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Jointo（jointo）PostgreSQL 数据库设计文档

项目名称：Jointo（jointo）
数据库：PostgreSQL 14+
文档版本：v1.2
创建日期：2025-01-27

1. 设计原则

1.1 遵循 PostgreSQL 最佳实践

✅ 使用 BIGINT GENERATED ALWAYS AS IDENTITY 作为主键
✅ 使用 TIMESTAMPTZ 存储时间戳
✅ 使用 TEXT 而非 VARCHAR(n)
✅ 使用 NUMERIC 存储精确数值（时间、金额）
✅ 使用 JSONB 存储灵活配置数据
✅ 为所有外键创建索引
✅ 使用 NOT NULL 约束确保数据完整性
✅ 使用 CHECK 约束验证业务规则

1.2 规范化设计

第三范式（3NF）：消除数据冗余
关联表：多对多关系使用关联表
软删除：使用 deleted_at 而非物理删除
审计字段：created_at, updated_at, created_by, updated_by

1.3 扩展性考虑

JSONB 字段：存储灵活配置，便于扩展
版本控制：支持项目版本管理
多租户：支持未来 SaaS 扩展
分区策略：大表考虑时间分区

2. 核心实体关系图

┌─────────┐         ┌──────────────┐         ┌─────────────┐
│  Users  │────────<│ProjectMembers│>────────│  Projects   │
└─────────┘         └──────────────┘         └─────────────┘
     │                                              │
     │                                              │
     │                                              │
     │                                              ├──────────┐
     │                                              │          │
     │                                              ▼          │
     │                                        ┌──────────┐    │
     │                                        │Storyboards│    │
     │                                        └──────────┘    │
     │                                              │          │
     │                                              │          │
     │                    ┌─────────────────────────┼──────────┘
     │                    │                         │
     │                    ▼                         ▼
     │              ┌──────────┐            ┌──────────────┐
     │              │Resources │<───────────│Storyboard    │
     │              └──────────┘          │Resources     │
     │                    │                 └──────────────┘
     │                    │
     │                    │
     │              ┌──────────┐
     │              │  Videos  │
     │              └──────────┘
     │                    │
     │                    │
     │              ┌──────────┐
     │              │SoundEffects│
     │              └──────────┘
     │                    │
     │                    │
     │              ┌──────────┐
     │              │ Subtitles│
     │              └──────────┘
     │                    │
     │                    │
     │              ┌──────────┐
     │              │Voiceovers│
     │              └──────────┘
     │                    │
     │                    │
     │              ┌──────────┐
     │              │TimelineTracks│
     │              └──────────┘
     │                    │
     │                    │
     │              ┌──────────┐
     │              │ Scripts  │◄──────┐
     │              └──────────┘       │
     │                    │            │
     │                    │            │
     │              ┌──────────┐       │
     │              │Attachments│──────┘
     │              └──────────┘
     │                    │
     │                    │
     │              ┌──────────┐
     │              │TimelineItems│
     │              └──────────┘
     │
     │
     ├──────────┐
     │          │
     │          ▼
     │    ┌──────────┐
     │    │ AIJobs   │
     │    └──────────┘
     │
     │
     ├──────────┐
     │          │
     │          ▼
     │    ┌──────────┐
     │    │Comments  │
     │    └──────────┘
     │
     │
     └──────────┐
                │
                ▼
          ┌──────────┐
          │Notifications│
          └──────────┘

3. 数据表设计

3.1 用户与认证

3.1.1 users（用户表）

CREATE TABLE users (
    user_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    email TEXT NOT NULL,
    username TEXT NOT NULL,
    password_hash TEXT NOT NULL,
    avatar_url TEXT,
    subscription_tier TEXT NOT NULL DEFAULT 'free' CHECK (subscription_tier IN ('free', 'pro', 'enterprise')),
    subscription_expires_at TIMESTAMPTZ,
    ai_credits_remaining INTEGER NOT NULL DEFAULT 10,
    ai_credits_total INTEGER NOT NULL DEFAULT 10,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ,
    CONSTRAINT users_email_unique UNIQUE (email) NULLS NOT DISTINCT,
    CONSTRAINT users_username_unique UNIQUE (username) NULLS NOT DISTINCT
);

-- 索引
CREATE UNIQUE INDEX idx_users_email_lower ON users (LOWER(email)) WHERE deleted_at IS NULL;
CREATE INDEX idx_users_username_lower ON users (LOWER(username)) WHERE deleted_at IS NULL;
CREATE INDEX idx_users_subscription_tier ON users (subscription_tier) WHERE deleted_at IS NULL;
CREATE INDEX idx_users_created_at ON users (created_at) WHERE deleted_at IS NULL;

-- 更新时间触发器
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = now();
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER update_users_updated_at
    BEFORE UPDATE ON users
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

设计说明：

使用 BIGINT GENERATED ALWAYS AS IDENTITY 作为主键
邮箱和用户名使用 LOWER() 索引实现大小写不敏感
软删除使用 deleted_at
订阅信息存储在用户表中，便于快速查询
AI 积分系统支持按量付费

3.1.2 user_sessions（用户会话表）

CREATE TABLE user_sessions (
    session_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    user_id BIGINT NOT NULL REFERENCES users(user_id) ON DELETE CASCADE,
    token TEXT NOT NULL UNIQUE,
    refresh_token TEXT,
    expires_at TIMESTAMPTZ NOT NULL,
    ip_address INET,
    user_agent TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    last_used_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX idx_user_sessions_user_id ON user_sessions (user_id);
CREATE INDEX idx_user_sessions_token ON user_sessions (token);
CREATE INDEX idx_user_sessions_expires_at ON user_sessions (expires_at);

3.2 文件夹管理

3.2.1 folders（文件夹表）

CREATE TABLE folders (
    folder_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    name TEXT NOT NULL,
    description TEXT,
    parent_folder_id BIGINT REFERENCES folders(folder_id) ON DELETE CASCADE,
    owner_id BIGINT NOT NULL REFERENCES users(user_id) ON DELETE CASCADE,
    path TEXT, -- 缓存路径，如 "/folder1/folder2/folder3"
    level INTEGER NOT NULL DEFAULT 0 CHECK (level >= 0 AND level <= 10), -- 层级深度，限制最大10层
    sort_order INTEGER NOT NULL DEFAULT 0, -- 同级排序
    color TEXT, -- 文件夹颜色（十六进制）
    icon TEXT, -- 文件夹图标名称
    is_shared BOOLEAN NOT NULL DEFAULT false, -- 是否共享文件夹
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ,
    -- 确保同一父文件夹下名称唯一
    CONSTRAINT folders_name_unique UNIQUE (parent_folder_id, name) NULLS NOT DISTINCT
);

-- 索引
CREATE INDEX idx_folders_parent_folder_id ON folders (parent_folder_id) WHERE deleted_at IS NULL;
CREATE INDEX idx_folders_owner_id ON folders (owner_id) WHERE deleted_at IS NULL;
CREATE INDEX idx_folders_path ON folders (path) WHERE deleted_at IS NULL AND path IS NOT NULL;
CREATE INDEX idx_folders_level ON folders (level) WHERE deleted_at IS NULL;
CREATE INDEX idx_folders_sort_order ON folders (parent_folder_id, sort_order) WHERE deleted_at IS NULL;
CREATE INDEX idx_folders_is_shared ON folders (is_shared) WHERE deleted_at IS NULL AND is_shared = true;
-- 全文搜索索引
CREATE INDEX idx_folders_name_trgm ON folders USING GIN (name gin_trgm_ops) WHERE deleted_at IS NULL;

-- 触发器
CREATE TRIGGER update_folders_updated_at
    BEFORE UPDATE ON folders
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

-- 路径更新触发器
CREATE OR REPLACE FUNCTION update_folder_path()
RETURNS TRIGGER AS $$
DECLARE
    parent_path TEXT;
BEGIN
    -- 如果是根文件夹
    IF NEW.parent_folder_id IS NULL THEN
        NEW.path = '/' || NEW.name;
        NEW.level = 0;
    ELSE
        -- 获取父文件夹路径和层级
        SELECT f.path, f.level INTO parent_path, NEW.level
        FROM folders f
        WHERE f.folder_id = NEW.parent_folder_id;

        NEW.path = parent_path || '/' || NEW.name;
        NEW.level = NEW.level + 1;

        -- 检查层级限制
        IF NEW.level > 10 THEN
            RAISE EXCEPTION '文件夹层级不能超过10层';
        END IF;
    END IF;

    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER update_folder_path_trigger
    BEFORE INSERT OR UPDATE ON folders
    FOR EACH ROW
    EXECUTE FUNCTION update_folder_path();

设计说明：

使用邻接列表模式存储树形结构
path 字段缓存完整路径，提升查询性能
level 字段记录层级深度，限制最大10层
支持文件夹颜色和图标自定义
同一父文件夹下名称唯一约束

3.2.2 folder_members（文件夹成员表）

CREATE TABLE folder_members (
    folder_member_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    folder_id BIGINT NOT NULL REFERENCES folders(folder_id) ON DELETE CASCADE,
    user_id BIGINT NOT NULL REFERENCES users(user_id) ON DELETE CASCADE,
    role member_role NOT NULL DEFAULT 'viewer',
    inherited BOOLEAN NOT NULL DEFAULT false, -- 是否从父文件夹继承权限
    invited_by BIGINT REFERENCES users(user_id),
    joined_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT folder_members_unique UNIQUE (folder_id, user_id) NULLS NOT DISTINCT
);

-- 索引
CREATE INDEX idx_folder_members_folder_id ON folder_members (folder_id);
CREATE INDEX idx_folder_members_user_id ON folder_members (user_id);
CREATE INDEX idx_folder_members_role ON folder_members (role);
CREATE INDEX idx_folder_members_inherited ON folder_members (inherited);

设计说明：

支持文件夹级别的协作权限
inherited 字段标记是否继承父文件夹权限
权限角色复用项目的 member_role 枚举

3.3 项目管理

3.3.1 projects（项目表）

CREATE TYPE project_type AS ENUM ('mine', 'collab');

CREATE TABLE projects (
    project_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    name TEXT NOT NULL,
    description TEXT,
    type project_type NOT NULL DEFAULT 'mine',
    owner_id BIGINT NOT NULL REFERENCES users(user_id) ON DELETE RESTRICT,
    folder_id BIGINT REFERENCES folders(folder_id) ON DELETE SET NULL, -- 所属文件夹
    thumbnail_url TEXT,
    settings JSONB NOT NULL DEFAULT '{}' CHECK (jsonb_typeof(settings) = 'object'),
    -- settings 结构: {"resolution": {"width": 1920, "height": 1080}, "frameRate": 30, "duration": 60, "exportFormat": "mp4", "exportQuality": "high"}
    status TEXT NOT NULL DEFAULT 'active' CHECK (status IN ('active', 'archived', 'deleted')),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ,
    -- 确保同一文件夹下项目名称唯一
    CONSTRAINT projects_name_unique UNIQUE (folder_id, name) NULLS NOT DISTINCT
);

-- 索引
CREATE INDEX idx_projects_owner_id ON projects (owner_id) WHERE deleted_at IS NULL;
CREATE INDEX idx_projects_folder_id ON projects (folder_id) WHERE deleted_at IS NULL AND folder_id IS NOT NULL;
CREATE INDEX idx_projects_type ON projects (type) WHERE deleted_at IS NULL;
CREATE INDEX idx_projects_status ON projects (status) WHERE deleted_at IS NULL;
CREATE INDEX idx_projects_created_at ON projects (created_at) WHERE deleted_at IS NULL;
CREATE INDEX idx_projects_updated_at ON projects (updated_at) WHERE deleted_at IS NULL;
-- JSONB 索引（用于查询设置）
CREATE INDEX idx_projects_settings_gin ON projects USING GIN (settings);
-- 全文搜索索引
CREATE INDEX idx_projects_name_trgm ON projects USING GIN (name gin_trgm_ops) WHERE deleted_at IS NULL;

-- 触发器
CREATE TRIGGER update_projects_updated_at
    BEFORE UPDATE ON projects
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

设计说明：

新增 folder_id 字段关联文件夹
项目可以不属于任何文件夹（根目录项目）
同一文件夹下项目名称唯一约束

设计说明：

使用 ENUM 类型定义项目类型
settings 使用 JSONB 存储灵活配置
使用 GIN 索引加速 JSONB 查询
软删除支持

3.3.2 project_members（项目成员表）

CREATE TYPE member_role AS ENUM ('owner', 'editor', 'viewer');

CREATE TABLE project_members (
    member_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    project_id BIGINT NOT NULL REFERENCES projects(project_id) ON DELETE CASCADE,
    user_id BIGINT NOT NULL REFERENCES users(user_id) ON DELETE CASCADE,
    role member_role NOT NULL DEFAULT 'viewer',
    invited_by BIGINT REFERENCES users(user_id),
    joined_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT project_members_unique UNIQUE (project_id, user_id) NULLS NOT DISTINCT
);

-- 索引
CREATE INDEX idx_project_members_project_id ON project_members (project_id);
CREATE INDEX idx_project_members_user_id ON project_members (user_id);
CREATE INDEX idx_project_members_role ON project_members (role);

设计说明：

使用 ENUM 定义角色类型
唯一约束确保用户不会重复加入同一项目
记录邀请人信息

3.3.3 project_versions（项目版本表）

CREATE TABLE project_versions (
    version_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    project_id BIGINT NOT NULL REFERENCES projects(project_id) ON DELETE CASCADE,
    version_number INTEGER NOT NULL,
    snapshot_data JSONB NOT NULL, -- 完整的项目快照数据
    created_by BIGINT NOT NULL REFERENCES users(user_id),
    note TEXT, -- 版本备注
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT project_versions_unique UNIQUE (project_id, version_number)
);

-- 索引
CREATE INDEX idx_project_versions_project_id ON project_versions (project_id);
CREATE INDEX idx_project_versions_created_at ON project_versions (created_at);
CREATE INDEX idx_project_versions_snapshot_gin ON project_versions USING GIN (snapshot_data);

设计说明：

版本号在项目内唯一
使用 JSONB 存储完整快照，便于恢复
GIN 索引支持快照数据查询

3.4 分镜管理

3.4.1 storyboards（分镜表）

CREATE TABLE storyboards (
    storyboard_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    project_id BIGINT NOT NULL REFERENCES projects(project_id) ON DELETE CASCADE,
    title TEXT NOT NULL,
    description TEXT NOT NULL,
    thumbnail_url TEXT,
    order_index INTEGER NOT NULL, -- 分镜顺序
    start_time NUMERIC(10, 3) NOT NULL DEFAULT 0, -- 开始时间（秒，支持毫秒）
    end_time NUMERIC(10, 3) NOT NULL, -- 结束时间（秒）
    transition_type TEXT, -- 转场类型
    transition_duration NUMERIC(5, 2), -- 转场时长（秒）
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT storyboards_order_unique UNIQUE (project_id, order_index) DEFERRABLE INITIALLY DEFERRED,
    CONSTRAINT storyboards_time_check CHECK (end_time > start_time)
);

-- 索引
CREATE INDEX idx_storyboards_project_id ON storyboards (project_id);
CREATE INDEX idx_storyboards_order ON storyboards (project_id, order_index);
CREATE INDEX idx_storyboards_time_range ON storyboards USING GIST (numrange(start_time, end_time));

-- 触发器
CREATE TRIGGER update_storyboards_updated_at
    BEFORE UPDATE ON storyboards
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

设计说明：

使用 NUMERIC(10, 3) 精确存储时间（支持毫秒）
使用 DEFERRABLE INITIALLY DEFERRED 处理顺序调整时的唯一约束冲突
使用 GiST 索引支持时间范围查询
转场信息存储在分镜表中

3.5 资源管理

3.5.1 project_resources（项目素材表）

CREATE TYPE resource_type AS ENUM ('character', 'scene', 'prop', 'real');

CREATE TABLE project_resources (
    project_resource_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    project_id BIGINT NOT NULL REFERENCES projects(project_id) ON DELETE CASCADE,
    name TEXT NOT NULL,
    type resource_type NOT NULL,

    -- 文件信息
    file_url TEXT NOT NULL,
    thumbnail_url TEXT,
    file_size BIGINT, -- 文件大小（字节）
    mime_type TEXT,
    width INTEGER, -- 图片宽度
    height INTEGER, -- 图片高度
    checksum TEXT NOT NULL, -- 文件校验和（SHA256）

    -- 来源（可选，后期扩展）
    source_resource_id BIGINT, -- 如果是从资源库复制的（后期扩展）

    -- AI 生成
    ai_job_id BIGINT REFERENCES ai_jobs(ai_job_id) ON DELETE SET NULL,
    metadata JSONB NOT NULL DEFAULT '{}', -- AI 生成参数等

    -- 审计
    created_by BIGINT NOT NULL REFERENCES users(user_id),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);

-- 索引
CREATE INDEX idx_project_resources_project_id ON project_resources (project_id) WHERE deleted_at IS NULL;
CREATE INDEX idx_project_resources_type ON project_resources (type) WHERE deleted_at IS NULL;
CREATE INDEX idx_project_resources_created_by ON project_resources (created_by) WHERE deleted_at IS NULL;
CREATE INDEX idx_project_resources_checksum ON project_resources (checksum);
CREATE INDEX idx_project_resources_ai_job_id ON project_resources (ai_job_id) WHERE ai_job_id IS NOT NULL;
CREATE INDEX idx_project_resources_metadata_gin ON project_resources USING GIN (metadata);
-- 全文搜索索引（资源名称）
CREATE INDEX idx_project_resources_name_trgm ON project_resources USING GIN (name gin_trgm_ops) WHERE deleted_at IS NULL;

-- 触发器
CREATE TRIGGER update_project_resources_updated_at
    BEFORE UPDATE ON project_resources
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

设计说明：

项目专属素材表，每个素材归属一个项目
使用 ENUM 定义资源类型：
- character（角色）：AI 生成或上传的角色素材
- scene（场景）：AI 生成或上传的场景素材
- prop（道具）：AI 生成或上传的道具素材
- real（实拍）：用户上传的实拍图片或视频
支持 AI 生成素材（关联 ai_job_id）
使用 checksum 支持去重
source_resource_id 字段预留，供后期资源库功能扩展

3.5.2 resources（系统资源库表 - 后期扩展）

-- 注意：此表暂不实现，保留设计供后期扩展
CREATE TABLE resources (
    resource_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    name TEXT NOT NULL,
    type resource_type NOT NULL,

    -- 文件信息
    file_url TEXT NOT NULL,
    thumbnail_url TEXT,
    file_size BIGINT,
    mime_type TEXT,
    width INTEGER,
    height INTEGER,
    checksum TEXT NOT NULL,

    -- 素材市场属性
    is_public BOOLEAN NOT NULL DEFAULT false, -- 是否公开到素材市场
    is_official BOOLEAN NOT NULL DEFAULT false, -- 是否官方资源
    price NUMERIC(10, 2), -- 价格
    download_count INTEGER NOT NULL DEFAULT 0, -- 下载次数
    rating NUMERIC(3, 2), -- 评分

    -- AI 生成
    ai_job_id BIGINT REFERENCES ai_jobs(ai_job_id),
    metadata JSONB NOT NULL DEFAULT '{}',

    -- 审计
    created_by BIGINT REFERENCES users(user_id),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);

-- 索引（后期实现）
CREATE INDEX idx_resources_type ON resources (type) WHERE deleted_at IS NULL;
CREATE INDEX idx_resources_is_public ON resources (is_public) WHERE deleted_at IS NULL AND is_public = true;
CREATE INDEX idx_resources_is_official ON resources (is_official) WHERE deleted_at IS NULL AND is_official = true;
CREATE INDEX idx_resources_rating ON resources (rating DESC) WHERE deleted_at IS NULL AND is_public = true;

设计说明：

系统资源库 + 素材市场功能
支持官方资源（is_official）和用户上传资源（is_public）
支持定价、评分、下载统计
前期开发暂不实现，保留表结构供后续扩展

3.5.3 storyboard_resources（分镜资源关联表）

CREATE TABLE storyboard_resources (
    storyboard_resource_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    storyboard_id BIGINT NOT NULL REFERENCES storyboards(storyboard_id) ON DELETE CASCADE,
    project_resource_id BIGINT NOT NULL REFERENCES project_resources(project_resource_id) ON DELETE CASCADE,
    resource_type resource_type NOT NULL, -- 冗余字段，便于查询
    display_order INTEGER NOT NULL DEFAULT 0, -- 显示顺序
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT storyboard_resources_unique UNIQUE (storyboard_id, project_resource_id) NULLS NOT DISTINCT
);

-- 索引
CREATE INDEX idx_storyboard_resources_storyboard_id ON storyboard_resources (storyboard_id);
CREATE INDEX idx_storyboard_resources_project_resource_id ON storyboard_resources (project_resource_id);
CREATE INDEX idx_storyboard_resources_type ON storyboard_resources (resource_type);

设计说明：

分镜与项目素材的多对多关联表
关联 project_resources 表（项目专属素材）
resource_type 冗余存储，避免 JOIN 查询
支持显示顺序

3.6 视频管理

3.6.1 videos（视频表）

CREATE TYPE video_generation_type AS ENUM ('img2video', 'text2video', 'keyframe', 'fusion', 'replace', 'real');

CREATE TABLE videos (
    video_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    project_id BIGINT NOT NULL REFERENCES projects(project_id) ON DELETE CASCADE,
    storyboard_id BIGINT REFERENCES storyboards(storyboard_id) ON DELETE SET NULL,
    name TEXT NOT NULL,
    type video_generation_type NOT NULL,
    video_url TEXT,
    thumbnail_url TEXT,
    duration NUMERIC(10, 3), -- 视频时长（秒）
    file_size BIGINT, -- 文件大小（字节）
    width INTEGER,
    height INTEGER,
    frame_rate NUMERIC(5, 2), -- 帧率
    start_time NUMERIC(10, 3) NOT NULL DEFAULT 0, -- 在分镜看板上的开始时间
    end_time NUMERIC(10, 3) NOT NULL, -- 在分镜看板上的结束时间
    metadata JSONB NOT NULL DEFAULT '{}', -- AI 生成参数、提示词等
    -- metadata 结构: {"prompt": "...", "model": "...", "parameters": {...}, "aiJobId": 123}
    status TEXT NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'processing', 'completed', 'failed')),
    ai_job_id BIGINT, -- 关联 AI 任务
    created_by BIGINT NOT NULL REFERENCES users(user_id),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT videos_time_check CHECK (end_time > start_time)
);

-- 索引
CREATE INDEX idx_videos_project_id ON videos (project_id);
CREATE INDEX idx_videos_storyboard_id ON videos (storyboard_id) WHERE storyboard_id IS NOT NULL;
CREATE INDEX idx_videos_type ON videos (type);
CREATE INDEX idx_videos_status ON videos (status);
CREATE INDEX idx_videos_time_range ON videos USING GIST (numrange(start_time, end_time));
CREATE INDEX idx_videos_created_by ON videos (created_by);
CREATE INDEX idx_videos_metadata_gin ON videos USING GIN (metadata);
CREATE INDEX idx_videos_ai_job_id ON videos (ai_job_id) WHERE ai_job_id IS NOT NULL;

-- 触发器
CREATE TRIGGER update_videos_updated_at
    BEFORE UPDATE ON videos
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

设计说明：

视频可以关联分镜，也可以独立存在
使用 numrange 和 GiST 索引支持时间范围查询
支持 AI 生成状态跟踪
元数据存储 AI 生成参数

3.7 音效管理

3.7.1 sound_effects（音效表）

CREATE TABLE sound_effects (
    sound_effect_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    project_id BIGINT NOT NULL REFERENCES projects(project_id) ON DELETE CASCADE,
    name TEXT NOT NULL,
    audio_url TEXT,
    duration NUMERIC(10, 3), -- 音效时长（秒）
    file_size BIGINT,
    start_time NUMERIC(10, 3) NOT NULL DEFAULT 0, -- 在分镜看板上的开始时间
    end_time NUMERIC(10, 3) NOT NULL, -- 在分镜看板上的结束时间
    volume INTEGER NOT NULL DEFAULT 100 CHECK (volume >= 0 AND volume <= 100), -- 音量 0-100
    fade_in NUMERIC(5, 2) DEFAULT 0, -- 淡入时长（秒）
    fade_out NUMERIC(5, 2) DEFAULT 0, -- 淡出时长（秒）
    metadata JSONB NOT NULL DEFAULT '{}', -- AI 生成参数等
    status TEXT NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'processing', 'completed', 'failed')),
    ai_job_id BIGINT,
    created_by BIGINT NOT NULL REFERENCES users(user_id),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT sound_effects_time_check CHECK (end_time > start_time)
);

-- 索引
CREATE INDEX idx_sound_effects_project_id ON sound_effects (project_id);
CREATE INDEX idx_sound_effects_time_range ON sound_effects USING GIST (numrange(start_time, end_time));
CREATE INDEX idx_sound_effects_status ON sound_effects (status);
CREATE INDEX idx_sound_effects_created_by ON sound_effects (created_by);

-- 触发器
CREATE TRIGGER update_sound_effects_updated_at
    BEFORE UPDATE ON sound_effects
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

3.8 字幕管理

3.8.1 subtitles（字幕表）

CREATE TABLE subtitles (
    subtitle_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    project_id BIGINT NOT NULL REFERENCES projects(project_id) ON DELETE CASCADE,
    text TEXT NOT NULL,
    start_time NUMERIC(10, 3) NOT NULL DEFAULT 0,
    end_time NUMERIC(10, 3) NOT NULL,
    style JSONB NOT NULL DEFAULT '{}', -- 样式配置
    -- style 结构: {"fontSize": 16, "color": "#FFFFFF", "position": "bottom", "backgroundColor": "#000000", "fontFamily": "Arial"}
    metadata JSONB NOT NULL DEFAULT '{}', -- AI 生成参数等
    status TEXT NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'processing', 'completed', 'failed')),
    ai_job_id BIGINT,
    created_by BIGINT NOT NULL REFERENCES users(user_id),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT subtitles_time_check CHECK (end_time > start_time)
);

-- 索引
CREATE INDEX idx_subtitles_project_id ON subtitles (project_id);
CREATE INDEX idx_subtitles_time_range ON subtitles USING GIST (numrange(start_time, end_time));
CREATE INDEX idx_subtitles_text_trgm ON subtitles USING GIN (text gin_trgm_ops); -- 全文搜索
CREATE INDEX idx_subtitles_status ON subtitles (status);

-- 触发器
CREATE TRIGGER update_subtitles_updated_at
    BEFORE UPDATE ON subtitles
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

3.9 配音管理

3.9.1 voiceovers（配音表）

CREATE TABLE voiceovers (
    voiceover_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    project_id BIGINT NOT NULL REFERENCES projects(project_id) ON DELETE CASCADE,
    text TEXT NOT NULL,
    audio_url TEXT,
    duration NUMERIC(10, 3), -- 配音时长（秒）
    file_size BIGINT,
    start_time NUMERIC(10, 3) NOT NULL DEFAULT 0,
    end_time NUMERIC(10, 3) NOT NULL,
    voice_type TEXT, -- 语音类型（如：male_01, female_01）
    voice_speed NUMERIC(3, 2) NOT NULL DEFAULT 1.0, -- 语速倍数
    volume INTEGER NOT NULL DEFAULT 100 CHECK (volume >= 0 AND volume <= 100),
    metadata JSONB NOT NULL DEFAULT '{}', -- AI 生成参数、语音克隆 ID 等
    status TEXT NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'processing', 'completed', 'failed')),
    ai_job_id BIGINT,
    created_by BIGINT NOT NULL REFERENCES users(user_id),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT voiceovers_time_check CHECK (end_time > start_time)
);

-- 索引
CREATE INDEX idx_voiceovers_project_id ON voiceovers (project_id);
CREATE INDEX idx_voiceovers_time_range ON voiceovers USING GIST (numrange(start_time, end_time));
CREATE INDEX idx_voiceovers_status ON voiceovers (status);
CREATE INDEX idx_voiceovers_voice_type ON voiceovers (voice_type) WHERE voice_type IS NOT NULL;

-- 触发器
CREATE TRIGGER update_voiceovers_updated_at
    BEFORE UPDATE ON voiceovers
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

3.10 分镜看板管理

3.10.1 timeline_tracks（分镜看板轨道表）

CREATE TYPE track_type AS ENUM ('storyboard', 'resource', 'video', 'sound', 'subtitle', 'voice');

CREATE TABLE timeline_tracks (
    track_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    project_id BIGINT NOT NULL REFERENCES projects(project_id) ON DELETE CASCADE,
    type track_type NOT NULL,
    name TEXT NOT NULL,
    display_order INTEGER NOT NULL DEFAULT 0, -- 显示顺序
    visible BOOLEAN NOT NULL DEFAULT true,
    locked BOOLEAN NOT NULL DEFAULT false,
    height INTEGER NOT NULL DEFAULT 60, -- 轨道高度（像素）
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT timeline_tracks_order_unique UNIQUE (project_id, display_order) DEFERRABLE INITIALLY DEFERRED
);

-- 索引
CREATE INDEX idx_timeline_tracks_project_id ON timeline_tracks (project_id);
CREATE INDEX idx_timeline_tracks_type ON timeline_tracks (type);
CREATE INDEX idx_timeline_tracks_order ON timeline_tracks (project_id, display_order);

-- 触发器
CREATE TRIGGER update_timeline_tracks_updated_at
    BEFORE UPDATE ON timeline_tracks
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

3.10.2 timeline_items（分镜看板项表）

CREATE TABLE timeline_items (
    timeline_item_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    track_id BIGINT NOT NULL REFERENCES timeline_tracks(track_id) ON DELETE CASCADE,
    item_type track_type NOT NULL,
    -- 关联到具体项的 ID（多态关联）
    storyboard_id BIGINT REFERENCES storyboards(storyboard_id) ON DELETE CASCADE,
    video_id BIGINT REFERENCES videos(video_id) ON DELETE CASCADE,
    sound_effect_id BIGINT REFERENCES sound_effects(sound_effect_id) ON DELETE CASCADE,
    subtitle_id BIGINT REFERENCES subtitles(subtitle_id) ON DELETE CASCADE,
    voiceover_id BIGINT REFERENCES voiceovers(voiceover_id) ON DELETE CASCADE,
    resource_id BIGINT REFERENCES resources(resource_id) ON DELETE CASCADE,
    -- 分镜看板上的位置
    start_time NUMERIC(10, 3) NOT NULL DEFAULT 0,
    end_time NUMERIC(10, 3) NOT NULL,
    display_order INTEGER NOT NULL DEFAULT 0, -- 同一轨道内的显示顺序
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT timeline_items_time_check CHECK (end_time > start_time),
    -- 确保只有一个关联项
    CONSTRAINT timeline_items_ref_check CHECK (
        (item_type = 'storyboard' AND storyboard_id IS NOT NULL AND video_id IS NULL AND sound_effect_id IS NULL AND subtitle_id IS NULL AND voiceover_id IS NULL AND resource_id IS NULL) OR
        (item_type = 'video' AND video_id IS NOT NULL AND storyboard_id IS NULL AND sound_effect_id IS NULL AND subtitle_id IS NULL AND voiceover_id IS NULL AND resource_id IS NULL) OR
        (item_type = 'sound' AND sound_effect_id IS NOT NULL AND storyboard_id IS NULL AND video_id IS NULL AND subtitle_id IS NULL AND voiceover_id IS NULL AND resource_id IS NULL) OR
        (item_type = 'subtitle' AND subtitle_id IS NOT NULL AND storyboard_id IS NULL AND video_id IS NULL AND sound_effect_id IS NULL AND voiceover_id IS NULL AND resource_id IS NULL) OR
        (item_type = 'voice' AND voiceover_id IS NOT NULL AND storyboard_id IS NULL AND video_id IS NULL AND sound_effect_id IS NULL AND subtitle_id IS NULL AND resource_id IS NULL) OR
        (item_type = 'resource' AND resource_id IS NOT NULL AND storyboard_id IS NULL AND video_id IS NULL AND sound_effect_id IS NULL AND subtitle_id IS NULL AND voiceover_id IS NULL)
    )
);

-- 索引
CREATE INDEX idx_timeline_items_track_id ON timeline_items (track_id);
CREATE INDEX idx_timeline_items_storyboard_id ON timeline_items (storyboard_id) WHERE storyboard_id IS NOT NULL;
CREATE INDEX idx_timeline_items_video_id ON timeline_items (video_id) WHERE video_id IS NOT NULL;
CREATE INDEX idx_timeline_items_sound_effect_id ON timeline_items (sound_effect_id) WHERE sound_effect_id IS NOT NULL;
CREATE INDEX idx_timeline_items_subtitle_id ON timeline_items (subtitle_id) WHERE subtitle_id IS NOT NULL;
CREATE INDEX idx_timeline_items_voiceover_id ON timeline_items (voiceover_id) WHERE voiceover_id IS NOT NULL;
CREATE INDEX idx_timeline_items_resource_id ON timeline_items (resource_id) WHERE resource_id IS NOT NULL;
CREATE INDEX idx_timeline_items_time_range ON timeline_items USING GIST (numrange(start_time, end_time));
CREATE INDEX idx_timeline_items_type ON timeline_items (item_type);

-- 触发器
CREATE TRIGGER update_timeline_items_updated_at
    BEFORE UPDATE ON timeline_items
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

设计说明：

使用多态关联（多个可空外键）实现不同类型项的关联
使用 CHECK 约束确保只有一个关联项非空
使用 GiST 索引支持时间范围查询

3.11 AI 任务管理

3.11.1 ai_jobs（AI 任务表）

CREATE TYPE ai_job_type AS ENUM ('image', 'video', 'sound', 'subtitle', 'voice', 'resource', 'storyboard_script', 'script_generation');
CREATE TYPE ai_job_status AS ENUM ('pending', 'processing', 'completed', 'failed', 'cancelled');

CREATE TABLE ai_jobs (
    ai_job_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    user_id BIGINT NOT NULL REFERENCES users(user_id) ON DELETE CASCADE,
    project_id BIGINT REFERENCES projects(project_id) ON DELETE SET NULL,
    storyboard_id BIGINT REFERENCES storyboards(storyboard_id) ON DELETE SET NULL,
    job_type ai_job_type NOT NULL,
    status ai_job_status NOT NULL DEFAULT 'pending',
    prompt TEXT NOT NULL,
    model TEXT, -- 使用的 AI 模型
    parameters JSONB NOT NULL DEFAULT '{}', -- AI 生成参数
    result JSONB, -- 生成结果（URL、ID 等）
    error_message TEXT,
    progress INTEGER NOT NULL DEFAULT 0 CHECK (progress >= 0 AND progress <= 100), -- 进度 0-100
    estimated_completion_at TIMESTAMPTZ,
    started_at TIMESTAMPTZ,
    completed_at TIMESTAMPTZ,
    cost NUMERIC(10, 4), -- 成本（元）
    credits_used INTEGER NOT NULL DEFAULT 0, -- 使用的积分
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

-- 索引
CREATE INDEX idx_ai_jobs_user_id ON ai_jobs (user_id);
CREATE INDEX idx_ai_jobs_project_id ON ai_jobs (project_id) WHERE project_id IS NOT NULL;
CREATE INDEX idx_ai_jobs_storyboard_id ON ai_jobs (storyboard_id) WHERE storyboard_id IS NOT NULL;
CREATE INDEX idx_ai_jobs_type ON ai_jobs (job_type);
CREATE INDEX idx_ai_jobs_status ON ai_jobs (status);
CREATE INDEX idx_ai_jobs_created_at ON ai_jobs (created_at);
CREATE INDEX idx_ai_jobs_status_created_at ON ai_jobs (status, created_at) WHERE status IN ('pending', 'processing');
CREATE INDEX idx_ai_jobs_parameters_gin ON ai_jobs USING GIN (parameters);
CREATE INDEX idx_ai_jobs_result_gin ON ai_jobs USING GIN (result) WHERE result IS NOT NULL;

-- 触发器
CREATE TRIGGER update_ai_jobs_updated_at
    BEFORE UPDATE ON ai_jobs
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

设计说明：

支持多种 AI 任务类型
跟踪任务状态和进度
记录成本和积分使用
支持结果和参数的 JSONB 查询

3.12 协作功能

3.12.1 comments（评论表）

CREATE TABLE comments (
    comment_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    project_id BIGINT NOT NULL REFERENCES projects(project_id) ON DELETE CASCADE,
    -- 多态关联：可以评论项目、分镜、视频等
    storyboard_id BIGINT REFERENCES storyboards(storyboard_id) ON DELETE CASCADE,
    video_id BIGINT REFERENCES videos(video_id) ON DELETE CASCADE,
    sound_effect_id BIGINT REFERENCES sound_effects(sound_effect_id) ON DELETE CASCADE,
    subtitle_id BIGINT REFERENCES subtitles(subtitle_id) ON DELETE CASCADE,
    voiceover_id BIGINT REFERENCES voiceovers(voiceover_id) ON DELETE CASCADE,
    timeline_item_id BIGINT REFERENCES timeline_items(timeline_item_id) ON DELETE CASCADE,
    -- 评论内容
    content TEXT NOT NULL,
    -- 父评论 ID（支持回复）
    parent_comment_id BIGINT REFERENCES comments(comment_id) ON DELETE CASCADE,
    -- 提及的用户（数组）
    mentioned_user_ids BIGINT[],
    -- 作者
    author_id BIGINT NOT NULL REFERENCES users(user_id) ON DELETE CASCADE,
    -- 位置信息（分镜看板上的位置）
    time_position NUMERIC(10, 3),
    -- 状态
    is_resolved BOOLEAN NOT NULL DEFAULT false,
    resolved_by BIGINT REFERENCES users(user_id),
    resolved_at TIMESTAMPTZ,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ,
    -- 确保只有一个关联项
    CONSTRAINT comments_ref_check CHECK (
        (storyboard_id IS NOT NULL AND video_id IS NULL AND sound_effect_id IS NULL AND subtitle_id IS NULL AND voiceover_id IS NULL AND timeline_item_id IS NULL) OR
        (video_id IS NOT NULL AND storyboard_id IS NULL AND sound_effect_id IS NULL AND subtitle_id IS NULL AND voiceover_id IS NULL AND timeline_item_id IS NULL) OR
        (sound_effect_id IS NOT NULL AND storyboard_id IS NULL AND video_id IS NULL AND subtitle_id IS NULL AND voiceover_id IS NULL AND timeline_item_id IS NULL) OR
        (subtitle_id IS NOT NULL AND storyboard_id IS NULL AND video_id IS NULL AND sound_effect_id IS NULL AND voiceover_id IS NULL AND timeline_item_id IS NULL) OR
        (voiceover_id IS NOT NULL AND storyboard_id IS NULL AND video_id IS NULL AND sound_effect_id IS NULL AND subtitle_id IS NULL AND timeline_item_id IS NULL) OR
        (timeline_item_id IS NOT NULL AND storyboard_id IS NULL AND video_id IS NULL AND sound_effect_id IS NULL AND subtitle_id IS NULL AND voiceover_id IS NULL) OR
        (storyboard_id IS NULL AND video_id IS NULL AND sound_effect_id IS NULL AND subtitle_id IS NULL AND voiceover_id IS NULL AND timeline_item_id IS NULL) -- 项目级评论
    )
);

-- 索引
CREATE INDEX idx_comments_project_id ON comments (project_id) WHERE deleted_at IS NULL;
CREATE INDEX idx_comments_storyboard_id ON comments (storyboard_id) WHERE storyboard_id IS NOT NULL AND deleted_at IS NULL;
CREATE INDEX idx_comments_video_id ON comments (video_id) WHERE video_id IS NOT NULL AND deleted_at IS NULL;
CREATE INDEX idx_comments_parent_comment_id ON comments (parent_comment_id) WHERE parent_comment_id IS NOT NULL;
CREATE INDEX idx_comments_author_id ON comments (author_id) WHERE deleted_at IS NULL;
CREATE INDEX idx_comments_created_at ON comments (created_at) WHERE deleted_at IS NULL;
CREATE INDEX idx_comments_mentioned_user_ids_gin ON comments USING GIN (mentioned_user_ids) WHERE mentioned_user_ids IS NOT NULL;

-- 触发器
CREATE TRIGGER update_comments_updated_at
    BEFORE UPDATE ON comments
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

设计说明：

支持多态关联（评论项目、分镜、视频等）
支持回复（父评论）
支持 @ 提及（数组存储）
支持分镜看板位置标记

3.12.2 notifications（通知表）

CREATE TYPE notification_type AS ENUM ('project', 'comment', 'mention', 'system', 'ai_job_completed', 'collaboration');

CREATE TABLE notifications (
    notification_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    user_id BIGINT NOT NULL REFERENCES users(user_id) ON DELETE CASCADE,
    type notification_type NOT NULL,
    title TEXT NOT NULL,
    content TEXT NOT NULL,
    -- 关联数据（JSONB）
    related_data JSONB,
    -- related_data 结构: {"projectId": 123, "commentId": 456, "aiJobId": 789, ...}
    is_read BOOLEAN NOT NULL DEFAULT false,
    read_at TIMESTAMPTZ,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

-- 索引
CREATE INDEX idx_notifications_user_id ON notifications (user_id);
CREATE INDEX idx_notifications_user_id_unread ON notifications (user_id, is_read) WHERE is_read = false;
CREATE INDEX idx_notifications_type ON notifications (type);
CREATE INDEX idx_notifications_created_at ON notifications (created_at);
CREATE INDEX idx_notifications_related_data_gin ON notifications USING GIN (related_data);

设计说明：

使用 ENUM 定义通知类型
使用 JSONB 存储关联数据，灵活支持不同类型
部分索引优化未读通知查询

3.13 模板与素材市场

3.13.1 templates（模板表）

CREATE TABLE templates (
    template_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    name TEXT NOT NULL,
    description TEXT,
    category TEXT NOT NULL, -- 'advertisement', 'promotion', 'short_video', 'tutorial'
    thumbnail_url TEXT,
    template_data JSONB NOT NULL, -- 模板数据（项目结构）
    is_public BOOLEAN NOT NULL DEFAULT false,
    is_official BOOLEAN NOT NULL DEFAULT false, -- 是否官方模板
    price NUMERIC(10, 2) NOT NULL DEFAULT 0,
    download_count INTEGER NOT NULL DEFAULT 0,
    rating NUMERIC(3, 2) NOT NULL DEFAULT 0 CHECK (rating >= 0 AND rating <= 5),
    rating_count INTEGER NOT NULL DEFAULT 0,
    created_by BIGINT REFERENCES users(user_id),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);

-- 索引
CREATE INDEX idx_templates_category ON templates (category) WHERE deleted_at IS NULL;
CREATE INDEX idx_templates_is_public ON templates (is_public) WHERE deleted_at IS NULL AND is_public = true;
CREATE INDEX idx_templates_is_official ON templates (is_official) WHERE deleted_at IS NULL AND is_official = true;
CREATE INDEX idx_templates_rating ON templates (rating DESC) WHERE deleted_at IS NULL AND is_public = true;
CREATE INDEX idx_templates_download_count ON templates (download_count DESC) WHERE deleted_at IS NULL AND is_public = true;
CREATE INDEX idx_templates_template_data_gin ON templates USING GIN (template_data);

3.13.2 template_purchases（模板购买记录表）

CREATE TABLE template_purchases (
    purchase_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    template_id BIGINT NOT NULL REFERENCES templates(template_id) ON DELETE RESTRICT,
    user_id BIGINT NOT NULL REFERENCES users(user_id) ON DELETE CASCADE,
    price NUMERIC(10, 2) NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT template_purchases_unique UNIQUE (template_id, user_id) NULLS NOT DISTINCT
);

CREATE INDEX idx_template_purchases_template_id ON template_purchases (template_id);
CREATE INDEX idx_template_purchases_user_id ON template_purchases (user_id);

3.14 导出任务

3.14.1 export_jobs（导出任务表）

CREATE TYPE export_format AS ENUM ('mp4', 'mov', 'avi', 'webm', 'json', 'pdf');
CREATE TYPE export_quality AS ENUM ('low', 'medium', 'high', 'ultra');
CREATE TYPE export_status AS ENUM ('pending', 'processing', 'completed', 'failed', 'cancelled');

CREATE TABLE export_jobs (
    export_job_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    project_id BIGINT NOT NULL REFERENCES projects(project_id) ON DELETE CASCADE,
    user_id BIGINT NOT NULL REFERENCES users(user_id) ON DELETE CASCADE,
    format export_format NOT NULL,
    quality export_quality NOT NULL DEFAULT 'high',
    resolution_width INTEGER,
    resolution_height INTEGER,
    include_watermark BOOLEAN NOT NULL DEFAULT false,
    status export_status NOT NULL DEFAULT 'pending',
    output_url TEXT, -- 导出文件 URL
    file_size BIGINT,
    progress INTEGER NOT NULL DEFAULT 0 CHECK (progress >= 0 AND progress <= 100),
    error_message TEXT,
    started_at TIMESTAMPTZ,
    completed_at TIMESTAMPTZ,
    expires_at TIMESTAMPTZ, -- 下载链接过期时间
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

-- 索引
CREATE INDEX idx_export_jobs_project_id ON export_jobs (project_id);
CREATE INDEX idx_export_jobs_user_id ON export_jobs (user_id);
CREATE INDEX idx_export_jobs_status ON export_jobs (status);
CREATE INDEX idx_export_jobs_status_created_at ON export_jobs (status, created_at) WHERE status IN ('pending', 'processing');
CREATE INDEX idx_export_jobs_expires_at ON export_jobs (expires_at) WHERE expires_at IS NOT NULL;

3.15 剧本管理

3.15.1 scripts（剧本表）

CREATE TYPE script_type AS ENUM ('text', 'file');
CREATE TYPE script_status AS ENUM ('draft', 'review', 'approved', 'archived');

CREATE TABLE scripts (
    script_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    project_id BIGINT NOT NULL REFERENCES projects(project_id) ON DELETE CASCADE,
    name TEXT NOT NULL,
    type script_type NOT NULL,

    -- 文本剧本字段
    content TEXT, -- 剧本文本内容（Markdown/纯文本）

    -- 文件剧本字段
    file_url TEXT,
    file_size BIGINT,
    mime_type TEXT,
    checksum TEXT, -- SHA256 校验和，配合 file_checksums 表去重
    storage_path TEXT,

    -- 元数据
    version INTEGER NOT NULL DEFAULT 1, -- 版本号
    word_count INTEGER DEFAULT 0, -- 字数统计
    scene_count INTEGER DEFAULT 0, -- 场景数量
    character_count INTEGER DEFAULT 0, -- 角色数量

    -- AI 生成相关
    ai_job_id BIGINT REFERENCES ai_jobs(ai_job_id) ON DELETE SET NULL,
    ai_prompt TEXT,

    -- 状态管理
    status script_status NOT NULL DEFAULT 'draft',

    -- 协作字段
    created_by BIGINT NOT NULL REFERENCES users(user_id),
    updated_by BIGINT REFERENCES users(user_id),
    approved_by BIGINT REFERENCES users(user_id),
    approved_at TIMESTAMPTZ,

    -- 审计字段
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ,

    -- 约束：content 和 file_url 二选一
    CONSTRAINT scripts_content_check CHECK (
        (type = 'text' AND content IS NOT NULL AND file_url IS NULL) OR
        (type = 'file' AND file_url IS NOT NULL AND content IS NULL)
    )
);

-- 索引
CREATE INDEX idx_scripts_project_id ON scripts (project_id) WHERE deleted_at IS NULL;
CREATE INDEX idx_scripts_type ON scripts (type) WHERE deleted_at IS NULL;
CREATE INDEX idx_scripts_status ON scripts (status) WHERE deleted_at IS NULL;
CREATE INDEX idx_scripts_created_by ON scripts (created_by) WHERE deleted_at IS NULL;
CREATE INDEX idx_scripts_ai_job_id ON scripts (ai_job_id) WHERE ai_job_id IS NOT NULL;
CREATE INDEX idx_scripts_checksum ON scripts (checksum) WHERE checksum IS NOT NULL;
-- 全文搜索索引（剧本名称和内容）
CREATE INDEX idx_scripts_name_trgm ON scripts USING GIN (name gin_trgm_ops) WHERE deleted_at IS NULL;
CREATE INDEX idx_scripts_content_trgm ON scripts USING GIN (content gin_trgm_ops) WHERE deleted_at IS NULL AND content IS NOT NULL;

-- 触发器
CREATE TRIGGER update_scripts_updated_at
    BEFORE UPDATE ON scripts
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

设计说明：

使用 ENUM 定义剧本类型（text, file）和状态
支持文本和文件两种剧本形式
文件剧本支持格式：TXT、DOC、DOCX、PDF、RTF、Markdown
文件剧本直接存储文件信息（file_url, file_size, checksum 等）
checksum 字段配合 file_checksums 表实现去重
与 videos、project_resources 表保持一致的设计模式
使用 CHECK 约束确保 content 和 file_url 二选一
支持版本号、字数统计等元数据
支持 AI 生成剧本的关联
支持审批流程（draft -> review -> approved -> archived）
全文搜索支持剧本名称和内容

3.15.2 script_versions（剧本版本历史表）

CREATE TABLE script_versions (
    version_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    script_id BIGINT NOT NULL REFERENCES scripts(script_id) ON DELETE CASCADE,
    version_number INTEGER NOT NULL,
    content_snapshot TEXT, -- 内容快照
    change_summary TEXT, -- 变更摘要
    word_count INTEGER DEFAULT 0,
    scene_count INTEGER DEFAULT 0,
    character_count INTEGER DEFAULT 0,
    created_by BIGINT NOT NULL REFERENCES users(user_id),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT script_versions_unique UNIQUE (script_id, version_number)
);

-- 索引
CREATE INDEX idx_script_versions_script_id ON script_versions (script_id);
CREATE INDEX idx_script_versions_created_at ON script_versions (created_at);
CREATE INDEX idx_script_versions_created_by ON script_versions (created_by);

设计说明：

记录剧本的每个版本快照
版本号在剧本内唯一
保存变更摘要，便于追溯
支持版本对比和回滚

3.15.3 script_characters（剧本角色表）

注意：此表设计已过时。最新的剧本管理表设计（使用 UUID v7 和 SMALLINT 枚举）请参考剧本管理服务文档。

CREATE TYPE character_role_type AS ENUM ('main', 'supporting', 'extra');

CREATE TABLE script_characters (
    character_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    script_id BIGINT NOT NULL REFERENCES scripts(script_id) ON DELETE CASCADE,
    name TEXT NOT NULL, -- 角色名
    description TEXT, -- 角色描述
    character_image_url VARCHAR(500), -- 角色形象图片地址
    role_type character_role_type NOT NULL DEFAULT 'supporting',
    line_count INTEGER DEFAULT 0, -- 台词数量
    appearance_count INTEGER DEFAULT 0, -- 出场次数
    metadata JSONB NOT NULL DEFAULT '{}', -- 额外元数据（性格、背景等）
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT script_characters_name_unique UNIQUE (script_id, name) NULLS NOT DISTINCT
);

-- 索引
CREATE INDEX idx_script_characters_script_id ON script_characters (script_id);
CREATE INDEX idx_script_characters_role_type ON script_characters (role_type);
CREATE INDEX idx_script_characters_name_trgm ON script_characters USING GIN (name gin_trgm_ops);

-- 触发器
CREATE TRIGGER update_script_characters_updated_at
    BEFORE UPDATE ON script_characters
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

设计说明：

管理剧本中的角色信息
支持角色类型分类（主角、配角、群演）
统计台词数量和出场次数
同一剧本内角色名称唯一

3.15.4 script_scenes（剧本场景表）

注意：此表设计已过时。最新的剧本管理表设计（使用 UUID v7 和 SMALLINT 枚举）请参考剧本管理服务文档。

CREATE TYPE time_of_day_type AS ENUM ('dawn', 'morning', 'noon', 'afternoon', 'dusk', 'night');

CREATE TABLE script_scenes (
    scene_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    script_id BIGINT NOT NULL REFERENCES scripts(script_id) ON DELETE CASCADE,
    scene_number INTEGER NOT NULL, -- 场景编号
    title TEXT NOT NULL, -- 场景标题
    location TEXT, -- 场景地点
    time_of_day time_of_day_type, -- 时间（白天/夜晚）
    description TEXT, -- 场景描述
    duration_estimate NUMERIC(10, 3), -- 预估时长（秒）
    order_index INTEGER NOT NULL, -- 排序
    metadata JSONB NOT NULL DEFAULT '{}', -- 额外元数据
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    CONSTRAINT script_scenes_order_unique UNIQUE (script_id, order_index) DEFERRABLE INITIALLY DEFERRED
);

-- 索引
CREATE INDEX idx_script_scenes_script_id ON script_scenes (script_id);
CREATE INDEX idx_script_scenes_order ON script_scenes (script_id, order_index);
CREATE INDEX idx_script_scenes_scene_number ON script_scenes (script_id, scene_number);

-- 触发器
CREATE TRIGGER update_script_scenes_updated_at
    BEFORE UPDATE ON script_scenes
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

设计说明：

管理剧本中的场景信息
支持场景编号和排序
记录场景地点、时间、描述
预估场景时长，便于制作规划

3.16 附件管理

3.16.1 attachments（附件表）

CREATE TYPE attachment_category AS ENUM ('document', 'image');

CREATE TABLE attachments (
    attachment_id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    name TEXT NOT NULL, -- 文件名
    original_name TEXT NOT NULL, -- 原始文件名
    file_url TEXT NOT NULL, -- 文件URL
    file_size BIGINT NOT NULL, -- 文件大小（字节）
    mime_type TEXT NOT NULL, -- MIME类型

    -- 文件类型分类
    category attachment_category NOT NULL,

    -- 文件元数据
    extension TEXT, -- 文件扩展名 (.pdf, .docx, .txt, .jpg, .png)
    checksum TEXT NOT NULL, -- 文件校验和（SHA256）

    -- 关联信息（一对多）
    project_id BIGINT REFERENCES projects(project_id) ON DELETE CASCADE,

    -- 访问控制
    is_public BOOLEAN NOT NULL DEFAULT false, -- 是否公开
    access_count INTEGER NOT NULL DEFAULT 0, -- 访问次数
    download_count INTEGER NOT NULL DEFAULT 0, -- 下载次数

    -- 存储信息
    storage_provider TEXT, -- 存储提供商（MinIO/S3/OSS）
    storage_path TEXT, -- 存储路径

    -- 审计字段
    uploaded_by BIGINT NOT NULL REFERENCES users(user_id),
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ,
    expires_at TIMESTAMPTZ -- 过期时间（临时文件）
);

-- 索引
CREATE INDEX idx_attachments_project_id ON attachments (project_id) WHERE deleted_at IS NULL AND project_id IS NOT NULL;
CREATE INDEX idx_attachments_category ON attachments (category) WHERE deleted_at IS NULL;
CREATE INDEX idx_attachments_uploaded_by ON attachments (uploaded_by) WHERE deleted_at IS NULL;
CREATE INDEX idx_attachments_created_at ON attachments (created_at) WHERE deleted_at IS NULL;
CREATE INDEX idx_attachments_expires_at ON attachments (expires_at) WHERE expires_at IS NOT NULL;
CREATE INDEX idx_attachments_checksum ON attachments (checksum);
-- 全文搜索索引（文件名）
CREATE INDEX idx_attachments_name_trgm ON attachments USING GIN (name gin_trgm_ops) WHERE deleted_at IS NULL;
CREATE INDEX idx_attachments_original_name_trgm ON attachments USING GIN (original_name gin_trgm_ops) WHERE deleted_at IS NULL;

-- 触发器
CREATE TRIGGER update_attachments_updated_at
    BEFORE UPDATE ON attachments
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

设计说明：

专注于文档类附件管理
分类简化为 document（文档）和 image（图片，用于头像、封面等）
支持一对多关联（project_id, script_id）
checksum 必填，支持去重
移除 user_id 关联（改为业务表存储，见下文）
记录访问和下载次数
支持临时文件（expires_at）

3.16.2 file_checksums（文件去重表）

CREATE TABLE file_checksums (
    checksum TEXT PRIMARY KEY,
    file_url TEXT NOT NULL,
    file_size BIGINT NOT NULL,
    mime_type TEXT NOT NULL,
    storage_provider TEXT,
    storage_path TEXT NOT NULL,
    reference_count INTEGER NOT NULL DEFAULT 1,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    last_accessed_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX idx_file_checksums_file_url ON file_checksums (file_url);
CREATE INDEX idx_file_checksums_reference_count ON file_checksums (reference_count);
CREATE INDEX idx_file_checksums_last_accessed ON file_checksums (last_accessed_at);

设计说明：

全局文件去重表
跨所有表（attachments, project_resources, videos 等）去重
记录引用计数，便于清理无引用文件
记录最后访问时间，便于清理过期文件

3.16.3 业务表新增字段（一对一关联）

users 表新增字段：

ALTER TABLE users ADD COLUMN avatar_id BIGINT REFERENCES attachments(attachment_id) ON DELETE SET NULL;
CREATE INDEX idx_users_avatar_id ON users (avatar_id) WHERE avatar_id IS NOT NULL;

projects 表新增字段：

ALTER TABLE projects ADD COLUMN cover_image_id BIGINT REFERENCES attachments(attachment_id) ON DELETE SET NULL;
CREATE INDEX idx_projects_cover_image_id ON projects (cover_image_id) WHERE cover_image_id IS NOT NULL;

storyboards 表新增字段：

ALTER TABLE storyboards ADD COLUMN thumbnail_id BIGINT REFERENCES attachments(attachment_id) ON DELETE SET NULL;
CREATE INDEX idx_storyboards_thumbnail_id ON storyboards (thumbnail_id) WHERE thumbnail_id IS NOT NULL;

设计说明：

一对一关系使用业务表存储附件ID
避免在 attachments 表中使用多态关联
语义清晰：users.avatar_id 明确表示"这是我的头像"
查询性能好：不需要 JOIN attachments 表即可获取ID

4. 索引设计

4.1 索引策略总结

主键索引：自动创建 B-tree 索引
外键索引：所有外键列都创建索引（PostgreSQL 不自动创建）
唯一索引：唯一约束自动创建索引
查询索引：根据常见查询模式创建索引
部分索引：对软删除数据使用 WHERE deleted_at IS NULL
复合索引：多列查询使用复合索引
GIN 索引：JSONB、数组、全文搜索
GiST 索引：范围查询（时间范围）

4.2 需要安装的扩展

-- 全文搜索（模糊搜索）
CREATE EXTENSION IF NOT EXISTS pg_trgm;

-- 如果需要向量搜索（AI 推荐）
-- CREATE EXTENSION IF NOT EXISTS vector;

5. 约束与触发器

5.1 常用约束

NOT NULL：必填字段
CHECK：业务规则验证（时间范围、数值范围等）
UNIQUE：唯一性约束
FOREIGN KEY：外键约束，指定 ON DELETE 行为
ENUM：枚举类型约束

5.2 触发器

updated_at 自动更新：所有表都有 updated_at 字段，通过触发器自动更新
软删除：通过 deleted_at 实现软删除
路径自动更新：文件夹路径和层级自动计算

5.3 文件夹权限检查函数

-- 检查用户是否有文件夹权限（包含继承权限）
CREATE OR REPLACE FUNCTION check_folder_permission(
    p_user_id BIGINT,
    p_folder_id BIGINT,
    p_required_role member_role DEFAULT 'viewer'
)
RETURNS BOOLEAN AS $$
DECLARE
    v_user_role member_role;
    v_folder_owner_id BIGINT;
    v_parent_folder_id BIGINT;
    v_role_priority INTEGER;
    v_required_priority INTEGER;
BEGIN
    -- 检查是否是文件夹所有者
    SELECT owner_id INTO v_folder_owner_id
    FROM folders
    WHERE folder_id = p_folder_id AND deleted_at IS NULL;

    IF v_folder_owner_id = p_user_id THEN
        RETURN true;
    END IF;

    -- 检查直接权限
    SELECT role INTO v_user_role
    FROM folder_members
    WHERE folder_id = p_folder_id AND user_id = p_user_id;

    -- 如果没有直接权限，检查继承权限
    IF v_user_role IS NULL THEN
        SELECT parent_folder_id INTO v_parent_folder_id
        FROM folders
        WHERE folder_id = p_folder_id;

        -- 递归检查父文件夹权限
        IF v_parent_folder_id IS NOT NULL THEN
            RETURN check_folder_permission(p_user_id, v_parent_folder_id, p_required_role);
        END IF;

        RETURN false;
    END IF;

    -- 角色优先级比较
    v_role_priority := CASE v_user_role
        WHEN 'owner' THEN 3
        WHEN 'editor' THEN 2
        WHEN 'viewer' THEN 1
        ELSE 0
    END;

    v_required_priority := CASE p_required_role
        WHEN 'owner' THEN 3
        WHEN 'editor' THEN 2
        WHEN 'viewer' THEN 1
        ELSE 0
    END;

    RETURN v_role_priority >= v_required_priority;
END;
$$ LANGUAGE plpgsql STABLE;

-- 检查用户是否有项目权限（包含文件夹继承权限）
CREATE OR REPLACE FUNCTION check_project_permission(
    p_user_id BIGINT,
    p_project_id BIGINT,
    p_required_role member_role DEFAULT 'viewer'
)
RETURNS BOOLEAN AS $$
DECLARE
    v_user_role member_role;
    v_project_owner_id BIGINT;
    v_folder_id BIGINT;
    v_role_priority INTEGER;
    v_required_priority INTEGER;
BEGIN
    -- 检查是否是项目所有者
    SELECT owner_id, folder_id INTO v_project_owner_id, v_folder_id
    FROM projects
    WHERE project_id = p_project_id AND deleted_at IS NULL;

    IF v_project_owner_id = p_user_id THEN
        RETURN true;
    END IF;

    -- 检查项目直接权限
    SELECT role INTO v_user_role
    FROM project_members
    WHERE project_id = p_project_id AND user_id = p_user_id;

    IF v_user_role IS NOT NULL THEN
        v_role_priority := CASE v_user_role
            WHEN 'owner' THEN 3
            WHEN 'editor' THEN 2
            WHEN 'viewer' THEN 1
            ELSE 0
        END;

        v_required_priority := CASE p_required_role
            WHEN 'owner' THEN 3
            WHEN 'editor' THEN 2
            WHEN 'viewer' THEN 1
            ELSE 0
        END;

        IF v_role_priority >= v_required_priority THEN
            RETURN true;
        END IF;
    END IF;

    -- 如果项目在文件夹中，检查文件夹权限
    IF v_folder_id IS NOT NULL THEN
        RETURN check_folder_permission(p_user_id, v_folder_id, p_required_role);
    END IF;

    RETURN false;
END;
$$ LANGUAGE plpgsql STABLE;

-- 获取用户可访问的文件夹列表（递归CTE）
CREATE OR REPLACE FUNCTION get_user_accessible_folders(p_user_id BIGINT)
RETURNS TABLE(folder_id BIGINT, name TEXT, path TEXT, level INTEGER) AS $$
BEGIN
    RETURN QUERY
    WITH RECURSIVE accessible_folders AS (
        -- 用户拥有的根文件夹
        SELECT f.folder_id, f.name, f.path, f.level, f.parent_folder_id
        FROM folders f
        WHERE f.owner_id = p_user_id
          AND f.deleted_at IS NULL
          AND f.parent_folder_id IS NULL

        UNION ALL

        -- 用户有权限的根文件夹
        SELECT f.folder_id, f.name, f.path, f.level, f.parent_folder_id
        FROM folders f
        INNER JOIN folder_members fm ON f.folder_id = fm.folder_id
        WHERE fm.user_id = p_user_id
          AND f.deleted_at IS NULL
          AND f.parent_folder_id IS NULL

        UNION ALL

        -- 递归获取子文件夹
        SELECT f.folder_id, f.name, f.path, f.level, f.parent_folder_id
        FROM folders f
        INNER JOIN accessible_folders af ON f.parent_folder_id = af.folder_id
        WHERE f.deleted_at IS NULL
    )
    SELECT af.folder_id, af.name, af.path, af.level
    FROM accessible_folders af
    ORDER BY af.path;
END;
$$ LANGUAGE plpgsql STABLE;

-- 防止循环引用的检查函数
CREATE OR REPLACE FUNCTION check_folder_cycle(
    p_folder_id BIGINT,
    p_new_parent_id BIGINT
)
RETURNS BOOLEAN AS $$
DECLARE
    v_current_id BIGINT;
BEGIN
    -- 如果新父文件夹为空，不会产生循环
    IF p_new_parent_id IS NULL THEN
        RETURN false;
    END IF;

    -- 不能将文件夹移动到自己
    IF p_folder_id = p_new_parent_id THEN
        RETURN true;
    END IF;

    -- 检查新父文件夹的祖先链中是否包含当前文件夹
    v_current_id := p_new_parent_id;

    WHILE v_current_id IS NOT NULL LOOP
        IF v_current_id = p_folder_id THEN
            RETURN true; -- 发现循环
        END IF;

        SELECT parent_folder_id INTO v_current_id
        FROM folders
        WHERE folder_id = v_current_id;
    END LOOP;

    RETURN false; -- 无循环
END;
$$ LANGUAGE plpgsql STABLE;

5.3 示例：项目成员权限检查函数

-- 检查用户是否有项目权限
CREATE OR REPLACE FUNCTION check_project_permission(
    p_user_id BIGINT,
    p_project_id BIGINT,
    p_required_role member_role DEFAULT 'viewer'
)
RETURNS BOOLEAN AS $$
DECLARE
    v_user_role member_role;
    v_role_priority INTEGER;
    v_required_priority INTEGER;
BEGIN
    -- 获取用户角色
    SELECT role INTO v_user_role
    FROM project_members
    WHERE project_id = p_project_id AND user_id = p_user_id;

    -- 如果是项目所有者，直接返回 true
    SELECT owner_id INTO v_user_role
    FROM projects
    WHERE project_id = p_project_id;

    IF v_user_role = p_user_id THEN
        RETURN true;
    END IF;

    -- 角色优先级：owner > editor > viewer
    v_role_priority := CASE v_user_role
        WHEN 'owner' THEN 3
        WHEN 'editor' THEN 2
        WHEN 'viewer' THEN 1
        ELSE 0
    END;

    v_required_priority := CASE p_required_role
        WHEN 'owner' THEN 3
        WHEN 'editor' THEN 2
        WHEN 'viewer' THEN 1
        ELSE 0
    END;

    RETURN v_role_priority >= v_required_priority;
END;
$$ LANGUAGE plpgsql STABLE;

6. 性能优化策略

6.1 分区策略

对于大表，考虑按时间分区：

-- 示例：AI 任务表按时间分区（如果数据量很大）
CREATE TABLE ai_jobs (
    -- ... 字段定义
) PARTITION BY RANGE (created_at);

CREATE TABLE ai_jobs_2024_q1 PARTITION OF ai_jobs
    FOR VALUES FROM ('2024-01-01') TO ('2024-04-01');
CREATE TABLE ai_jobs_2024_q2 PARTITION OF ai_jobs
    FOR VALUES FROM ('2024-04-01') TO ('2024-07-01');
-- ...

6.2 物化视图

对于复杂查询，使用物化视图：

-- 项目统计信息物化视图
CREATE MATERIALIZED VIEW project_statistics AS
SELECT
    p.project_id,
    p.name,
    COUNT(DISTINCT s.storyboard_id) AS storyboard_count,
    COUNT(DISTINCT v.video_id) AS video_count,
    COUNT(DISTINCT se.sound_effect_id) AS sound_effect_count,
    COUNT(DISTINCT st.subtitle_id) AS subtitle_count,
    COUNT(DISTINCT vo.voiceover_id) AS voiceover_count,
    COUNT(DISTINCT pm.user_id) AS member_count
FROM projects p
LEFT JOIN storyboards s ON s.project_id = p.project_id
LEFT JOIN videos v ON v.project_id = p.project_id
LEFT JOIN sound_effects se ON se.project_id = p.project_id
LEFT JOIN subtitles st ON st.project_id = p.project_id
LEFT JOIN voiceovers vo ON vo.project_id = p.project_id
LEFT JOIN project_members pm ON pm.project_id = p.project_id
WHERE p.deleted_at IS NULL
GROUP BY p.project_id, p.name;

CREATE UNIQUE INDEX ON project_statistics (project_id);

-- 定期刷新（通过定时任务）
-- REFRESH MATERIALIZED VIEW CONCURRENTLY project_statistics;

6.3 连接池配置

使用 PgBouncer 或 pgpool-II 进行连接池管理
配置合理的连接数限制

6.4 查询优化建议

避免 N+1 查询：使用 JOIN 或批量查询
使用 EXPLAIN ANALYZE：分析查询计划
合理使用索引：避免过度索引
批量操作：使用 COPY 或批量 INSERT

7. 数据迁移策略

7.1 使用 Alembic（Python）或 Flyway（Java）

推荐使用 Alembic 进行数据库迁移管理。

7.2 迁移脚本示例

-- migrations/001_initial_schema.sql
-- 创建所有表、索引、约束

-- migrations/002_add_ai_jobs.sql
-- 添加 AI 任务表

-- migrations/003_add_comments.sql
-- 添加评论功能

7.3 数据迁移注意事项

向后兼容：新字段使用 DEFAULT 或 NULL
分步迁移：大表迁移分步进行
回滚方案：准备回滚脚本
测试环境：先在测试环境验证

8. 安全考虑

8.1 行级安全（RLS）

-- 启用行级安全
ALTER TABLE projects ENABLE ROW LEVEL SECURITY;

-- 项目访问策略
CREATE POLICY project_access_policy ON projects
    FOR SELECT
    USING (
        owner_id = current_setting('app.current_user_id')::BIGINT
        OR project_id IN (
            SELECT project_id FROM project_members
            WHERE user_id = current_setting('app.current_user_id')::BIGINT
        )
    );

8.2 数据加密

传输加密：使用 SSL/TLS
存储加密：敏感字段加密存储
密码哈希：使用 pgcrypto 扩展

9. 监控与维护

9.1 慢查询监控

-- 启用慢查询日志
ALTER SYSTEM SET log_min_duration_statement = 1000; -- 记录超过 1 秒的查询

9.2 统计信息

-- 更新统计信息
ANALYZE;

-- 查看表大小
SELECT
    schemaname,
    tablename,
    pg_size_pretty(pg_total_relation_size(schemaname||'.'||tablename)) AS size
FROM pg_tables
WHERE schemaname = 'public'
ORDER BY pg_total_relation_size(schemaname||'.'||tablename) DESC;

9.3 定期维护

VACUUM：清理死元组
REINDEX：重建索引
ANALYZE：更新统计信息

10. 总结

10.1 设计亮点

✅ 规范化设计：遵循 3NF，减少冗余
✅ 灵活扩展：JSONB 存储灵活配置
✅ 性能优化：合理的索引策略
✅ 关联完整：所有关联关系都有外键约束
✅ 软删除：支持数据恢复
✅ 审计追踪：记录创建和更新时间
✅ 多态关联：支持灵活的关联关系

10.2 后续优化方向

分区：大表按时间分区
缓存：Redis 缓存热点数据
读写分离：主从复制
分库分表：如果数据量极大

10.3 剧本和附件模块设计亮点

✅ 灵活的剧本类型：支持文本和附件两种形式，满足不同输入方式
✅ 完整的版本管理：剧本版本历史表支持版本追溯和回滚
✅ 结构化剧本数据：角色表和场景表支持剧本的结构化管理
✅ 通用附件系统：附件表可复用于多种场景（剧本、合同、参考文档等）
✅ AI 生成支持：剧本表关联 AI 任务，支持 AI 辅助创作
✅ 审批流程：剧本状态管理支持草稿、审核、批准流程
✅ 全文搜索：剧本内容、角色名、场景信息均支持全文搜索
✅ 文件安全：附件表支持校验和、访问控制、过期时间

文档版本：v1.2
最后更新：2025-01-27
变更记录：

v1.2 (2025-01-27)

重构资源管理架构：
- 新增 project_resources 表（项目专属素材）
- 保留 resources 表设计（系统资源库+素材市场，后期扩展）
- 更新 storyboard_resources 关联到 project_resources
优化附件管理：
- 简化 attachments 表分类（document, image）
- 移除 user_id 关联，改为业务表存储（users.avatar_id, projects.cover_image_id, storyboards.thumbnail_id）
- 新增 script_id 关联
- checksum 字段改为必填
新增 file_checksums 表（全局文件去重）
新增业务表字段：
- users.avatar_id
- projects.cover_image_id
- storyboards.thumbnail_id

v1.1 (2025-01-27)

新增剧本管理模块（scripts、script_versions、script_characters、script_scenes）
新增附件管理模块（attachments）
更新 AI 任务类型，新增 script_generation
更新核心实体关系图

v1.0 (2025-01-27)

初始版本
完整的数据库设计文档

下一步：根据本文档创建 Alembic 迁移脚本，初始化数据库

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Jointo（jointo）PostgreSQL 数据库设计文档

目录

1. 设计原则

1.1 遵循 PostgreSQL 最佳实践

1.2 规范化设计

1.3 扩展性考虑

2. 核心实体关系图

3. 数据表设计

3.1 用户与认证

3.1.1 users（用户表）

3.1.2 user_sessions（用户会话表）

3.2 文件夹管理

3.2.1 folders（文件夹表）

3.2.2 folder_members（文件夹成员表）

3.3 项目管理

3.3.1 projects（项目表）

3.3.2 project_members（项目成员表）

3.3.3 project_versions（项目版本表）

3.4 分镜管理

3.4.1 storyboards（分镜表）

3.5 资源管理

3.5.1 project_resources（项目素材表）

3.5.2 resources（系统资源库表 - 后期扩展）

3.5.3 storyboard_resources（分镜资源关联表）

3.6 视频管理

3.6.1 videos（视频表）

3.7 音效管理

3.7.1 sound_effects（音效表）

3.8 字幕管理

3.8.1 subtitles（字幕表）

3.9 配音管理

3.9.1 voiceovers（配音表）

3.10 分镜看板管理

3.10.1 timeline_tracks（分镜看板轨道表）

3.10.2 timeline_items（分镜看板项表）

3.11 AI 任务管理

3.11.1 ai_jobs（AI 任务表）

3.12 协作功能

3.12.1 comments（评论表）

3.12.2 notifications（通知表）

3.13 模板与素材市场

3.13.1 templates（模板表）

3.13.2 template_purchases（模板购买记录表）

3.14 导出任务

3.14.1 export_jobs（导出任务表）

3.15 剧本管理

3.15.1 scripts（剧本表）

3.15.2 script_versions（剧本版本历史表）

3.15.3 script_characters（剧本角色表）

3.15.4 script_scenes（剧本场景表）

3.16 附件管理

3.16.1 attachments（附件表）

3.16.2 file_checksums（文件去重表）

3.16.3 业务表新增字段（一对一关联）

4. 索引设计

4.1 索引策略总结

4.2 需要安装的扩展

5. 约束与触发器

5.1 常用约束

5.2 触发器

5.3 文件夹权限检查函数

5.3 示例：项目成员权限检查函数

6. 性能优化策略

6.1 分区策略

6.2 物化视图

6.3 连接池配置

6.4 查询优化建议

7. 数据迁移策略

7.1 使用 Alembic（Python）或 Flyway（Java）

7.2 迁移脚本示例

7.3 数据迁移注意事项

8. 安全考虑

8.1 行级安全（RLS）

8.2 数据加密

9. 监控与维护

9.1 慢查询监控

9.2 统计信息

9.3 定期维护

10. 总结

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