-- 视频系统数据库设计 -- 基于 ak_contents 扩展，支持视频内容、弹幕、评论、收藏、转发、点赞等功能 -- ================================ -- 重要说明：内容类型校验 -- ================================ -- 注意：由于 PostgreSQL 不支持在 CHECK 约束中使用子查询， -- 以下表的内容类型校验需要在应用层实现： -- -- 1. ak_video_danmakus: 应确保 content_id 对应的内容类型为 'video' 或 'audio' -- 2. ak_video_play_records: 应确保 content_id 对应的内容类型为 'video' 或 'audio' -- 3. ak_image_tags: 应确保 content_id 对应的内容类型为 'image' -- 4. ak_image_view_records: 应确保 content_id 对应的内容类型为 'image' -- -- 建议在应用层（如 Supabase RPC 函数）中添加这些校验逻辑 -- ================================ -- 1. 扩展 ak_contents 表，增加多媒体相关字段 ALTER TABLE ak_contents ADD COLUMN IF NOT EXISTS content_type VARCHAR(20) DEFAULT 'article' CHECK (content_type IN ('article', 'video', 'audio', 'image')), -- 视频相关字段 ADD COLUMN IF NOT EXISTS video_url TEXT, ADD COLUMN IF NOT EXISTS video_duration INTEGER, -- 视频时长（秒） ADD COLUMN IF NOT EXISTS video_poster TEXT, -- 视频封面 ADD COLUMN IF NOT EXISTS video_width INTEGER, ADD COLUMN IF NOT EXISTS video_height INTEGER, ADD COLUMN IF NOT EXISTS video_size BIGINT, -- 文件大小（字节） ADD COLUMN IF NOT EXISTS video_format VARCHAR(10), -- mp4, webm, etc ADD COLUMN IF NOT EXISTS video_quality VARCHAR(10), -- 720p, 1080p, 4k, etc -- 音频相关字段 ADD COLUMN IF NOT EXISTS audio_url TEXT, ADD COLUMN IF NOT EXISTS audio_duration INTEGER, -- 音频时长（秒） ADD COLUMN IF NOT EXISTS audio_size BIGINT, -- 文件大小（字节） ADD COLUMN IF NOT EXISTS audio_format VARCHAR(10), -- mp3, wav, flac, etc ADD COLUMN IF NOT EXISTS audio_bitrate INTEGER, -- 比特率（kbps） ADD COLUMN IF NOT EXISTS audio_sample_rate INTEGER, -- 采样率（Hz） ADD COLUMN IF NOT EXISTS audio_cover TEXT, -- 音频封面图 -- 图片相关字段 ADD COLUMN IF NOT EXISTS image_url TEXT, ADD COLUMN IF NOT EXISTS image_width INTEGER, ADD COLUMN IF NOT EXISTS image_height INTEGER, ADD COLUMN IF NOT EXISTS image_size BIGINT, -- 文件大小（字节） ADD COLUMN IF NOT EXISTS image_format VARCHAR(10), -- jpg, png, webp, etc ADD COLUMN IF NOT EXISTS image_quality VARCHAR(10), -- original, compressed, thumbnail ADD COLUMN IF NOT EXISTS image_alt_text TEXT, -- 图片alt文本，用于无障碍访问 -- 图集字段 ADD COLUMN IF NOT EXISTS images JSONB, -- 图集数据，支持多图片存储 -- 通用字段 ADD COLUMN IF NOT EXISTS allow_danmu BOOLEAN DEFAULT true, -- 视频/音频是否允许弹幕 ADD COLUMN IF NOT EXISTS allow_download BOOLEAN DEFAULT false, -- 是否允许下载 ADD COLUMN IF NOT EXISTS media_metadata JSONB; -- 存储额外的媒体元数据 -- 2. 多媒体弹幕表（支持视频和音频） CREATE TABLE IF NOT EXISTS ak_video_danmakus ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), content_id UUID REFERENCES ak_contents(id) ON DELETE CASCADE, user_id UUID REFERENCES auth.users(id) ON DELETE CASCADE, user_name VARCHAR(100) NOT NULL, text TEXT NOT NULL, time_point DECIMAL(10,3) NOT NULL, -- 时间点（秒，支持小数），适用于视频和音频 color VARCHAR(7) DEFAULT '#FFFFFF', -- 弹幕颜色 font_size INTEGER DEFAULT 25, -- 字体大小 position_type VARCHAR(10) DEFAULT 'scroll' CHECK (position_type IN ('scroll', 'top', 'bottom')), speed INTEGER DEFAULT 1, -- 滚动速度 is_visible BOOLEAN DEFAULT true, status VARCHAR(20) DEFAULT 'active' CHECK (status IN ('active', 'hidden', 'deleted', 'reviewing')), ip_address INET, user_agent TEXT, created_at TIMESTAMPTZ DEFAULT NOW(), updated_at TIMESTAMPTZ DEFAULT NOW() ); -- 3. 用户行为表（点赞、收藏、转发等） CREATE TABLE IF NOT EXISTS ak_user_interactions ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), user_id UUID REFERENCES auth.users(id) ON DELETE CASCADE, content_id UUID REFERENCES ak_contents(id) ON DELETE CASCADE, interaction_type VARCHAR(20) NOT NULL CHECK (interaction_type IN ('like', 'favorite', 'share', 'view', 'download')), interaction_data JSONB, -- 额外数据，如分享到的平台、收藏夹ID等 created_at TIMESTAMPTZ DEFAULT NOW(), UNIQUE(user_id, content_id, interaction_type) -- 防止重复操作 ); -- 4. 评论表（支持多级回复） CREATE TABLE IF NOT EXISTS ak_content_comments ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), content_id UUID REFERENCES ak_contents(id) ON DELETE CASCADE, user_id UUID REFERENCES auth.users(id) ON DELETE CASCADE, user_name VARCHAR(100) NOT NULL, parent_id UUID REFERENCES ak_content_comments(id) ON DELETE CASCADE, -- 父评论ID，NULL表示主评论 reply_to_user_id UUID REFERENCES auth.users(id), -- 回复的用户ID reply_to_user_name VARCHAR(100), -- 回复的用户名 content TEXT NOT NULL, like_count INTEGER DEFAULT 0, reply_count INTEGER DEFAULT 0, -- 回复数量 status VARCHAR(20) DEFAULT 'active' CHECK (status IN ('active', 'hidden', 'deleted', 'reviewing')), is_pinned BOOLEAN DEFAULT false, -- 是否置顶 ip_address INET, user_agent TEXT, created_at TIMESTAMPTZ DEFAULT NOW(), updated_at TIMESTAMPTZ DEFAULT NOW() ); -- 5. 评论点赞表 CREATE TABLE IF NOT EXISTS ak_comment_likes ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), comment_id UUID REFERENCES ak_content_comments(id) ON DELETE CASCADE, user_id UUID REFERENCES auth.users(id) ON DELETE CASCADE, created_at TIMESTAMPTZ DEFAULT NOW(), UNIQUE(comment_id, user_id) -- 防止重复点赞 ); -- 6. 媒体播放记录表（支持视频、音频） CREATE TABLE IF NOT EXISTS ak_video_play_records ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), content_id UUID REFERENCES ak_contents(id) ON DELETE CASCADE, user_id UUID REFERENCES auth.users(id) ON DELETE CASCADE, play_position DECIMAL(10,3) DEFAULT 0, -- 播放位置（秒） play_duration DECIMAL(10,3) DEFAULT 0, -- 播放时长（秒） play_percentage DECIMAL(5,2) DEFAULT 0, -- 播放进度百分比 is_completed BOOLEAN DEFAULT false, -- 是否播放完成 device_type VARCHAR(20), -- 设备类型 resolution VARCHAR(10), -- 播放分辨率（视频专用） quality VARCHAR(10), -- 播放质量（音频/视频） play_speed DECIMAL(3,2) DEFAULT 1.0, -- 播放速度 volume INTEGER DEFAULT 100, -- 音量（0-100） media_type VARCHAR(10), -- 媒体类型：video, audio created_at TIMESTAMPTZ DEFAULT NOW(), updated_at TIMESTAMPTZ DEFAULT NOW() ); -- 7. 弹幕举报表 CREATE TABLE IF NOT EXISTS ak_danmu_reports ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), danmu_id UUID REFERENCES ak_video_danmakus(id) ON DELETE CASCADE, reporter_id UUID REFERENCES auth.users(id) ON DELETE CASCADE, report_type VARCHAR(20) NOT NULL CHECK (report_type IN ('spam', 'inappropriate', 'harassment', 'advertising')), report_reason TEXT, status VARCHAR(20) DEFAULT 'pending' CHECK (status IN ('pending', 'processed', 'rejected')), created_at TIMESTAMPTZ DEFAULT NOW() ); -- 8. 内容统计表（缓存统计数据） CREATE TABLE IF NOT EXISTS ak_content_statistics ( content_id UUID PRIMARY KEY REFERENCES ak_contents(id) ON DELETE CASCADE, view_count INTEGER DEFAULT 0, like_count INTEGER DEFAULT 0, favorite_count INTEGER DEFAULT 0, share_count INTEGER DEFAULT 0, comment_count INTEGER DEFAULT 0, danmu_count INTEGER DEFAULT 0, -- 弹幕数量（视频/音频专用） play_completion_rate DECIMAL(5,2) DEFAULT 0, -- 播放完成率（视频/音频专用） average_play_duration DECIMAL(10,3) DEFAULT 0, -- 平均播放时长（视频/音频专用） download_count INTEGER DEFAULT 0, -- 下载次数 updated_at TIMESTAMPTZ DEFAULT NOW() ); -- 9. 图片标签表（用于图片分类和搜索） CREATE TABLE IF NOT EXISTS ak_image_tags ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), content_id UUID REFERENCES ak_contents(id) ON DELETE CASCADE, tag_name VARCHAR(50) NOT NULL, tag_type VARCHAR(20) DEFAULT 'user' CHECK (tag_type IN ('user', 'auto', 'ai')), -- 标签来源：用户添加、自动识别、AI生成 confidence DECIMAL(3,2), -- 置信度（0-1），适用于AI标签 created_at TIMESTAMPTZ DEFAULT NOW(), UNIQUE(content_id, tag_name) ); -- 10. 图片浏览记录表 CREATE TABLE IF NOT EXISTS ak_image_view_records ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), content_id UUID REFERENCES ak_contents(id) ON DELETE CASCADE, user_id UUID REFERENCES auth.users(id) ON DELETE CASCADE, view_duration INTEGER DEFAULT 0, -- 浏览时长（秒） zoom_level DECIMAL(4,2) DEFAULT 1.0, -- 缩放级别 device_type VARCHAR(20), -- 设备类型 screen_resolution VARCHAR(20), -- 屏幕分辨率 created_at TIMESTAMPTZ DEFAULT NOW() ); -- ================================ -- 索引优化 -- ================================ -- 内容表索引 CREATE INDEX IF NOT EXISTS idx_contents_type ON ak_contents(content_type); CREATE INDEX IF NOT EXISTS idx_contents_type_published ON ak_contents(content_type, published_at DESC); -- 图集索引（使用 GIN 索引支持 JSONB 查询） CREATE INDEX IF NOT EXISTS idx_contents_images_gin ON ak_contents USING GIN (images); -- 弹幕表索引 CREATE INDEX IF NOT EXISTS idx_danmakus_content_time ON ak_video_danmakus(content_id, time_point); CREATE INDEX IF NOT EXISTS idx_danmakus_user ON ak_video_danmakus(user_id); CREATE INDEX IF NOT EXISTS idx_danmakus_status ON ak_video_danmakus(status); -- 用户交互表索引 CREATE INDEX IF NOT EXISTS idx_interactions_user_type ON ak_user_interactions(user_id, interaction_type); CREATE INDEX IF NOT EXISTS idx_interactions_content_type ON ak_user_interactions(content_id, interaction_type); -- 评论表索引 CREATE INDEX IF NOT EXISTS idx_comments_content ON ak_content_comments(content_id, status, created_at DESC); CREATE INDEX IF NOT EXISTS idx_comments_parent ON ak_content_comments(parent_id); CREATE INDEX IF NOT EXISTS idx_comments_user ON ak_content_comments(user_id); -- 播放记录表索引 CREATE INDEX IF NOT EXISTS idx_play_records_user_content ON ak_video_play_records(user_id, content_id); CREATE INDEX IF NOT EXISTS idx_play_records_content_time ON ak_video_play_records(content_id, created_at DESC); CREATE INDEX IF NOT EXISTS idx_play_records_media_type ON ak_video_play_records(media_type); -- 图片标签表索引 CREATE INDEX IF NOT EXISTS idx_image_tags_content ON ak_image_tags(content_id); CREATE INDEX IF NOT EXISTS idx_image_tags_name ON ak_image_tags(tag_name); CREATE INDEX IF NOT EXISTS idx_image_tags_type ON ak_image_tags(tag_type); -- 图片浏览记录表索引 CREATE INDEX IF NOT EXISTS idx_image_views_user_content ON ak_image_view_records(user_id, content_id); CREATE INDEX IF NOT EXISTS idx_image_views_content_time ON ak_image_view_records(content_id, created_at DESC); -- ================================ -- 触发器和函数 -- ================================ -- 更新评论数量的触发器 CREATE OR REPLACE FUNCTION update_comment_counts() RETURNS TRIGGER AS $$ BEGIN IF TG_OP = 'INSERT' THEN -- 更新内容统计 INSERT INTO ak_content_statistics (content_id, comment_count) VALUES (NEW.content_id, 1) ON CONFLICT (content_id) DO UPDATE SET comment_count = ak_content_statistics.comment_count + 1, updated_at = NOW(); -- 更新父评论回复数 IF NEW.parent_id IS NOT NULL THEN UPDATE ak_content_comments SET reply_count = reply_count + 1 WHERE id = NEW.parent_id; END IF; ELSIF TG_OP = 'DELETE' THEN -- 更新内容统计 UPDATE ak_content_statistics SET comment_count = GREATEST(0, comment_count - 1), updated_at = NOW() WHERE content_id = OLD.content_id; -- 更新父评论回复数 IF OLD.parent_id IS NOT NULL THEN UPDATE ak_content_comments SET reply_count = GREATEST(0, reply_count - 1) WHERE id = OLD.parent_id; END IF; END IF; RETURN NULL; END; $$ LANGUAGE plpgsql; CREATE TRIGGER tr_comment_counts AFTER INSERT OR DELETE ON ak_content_comments FOR EACH ROW EXECUTE FUNCTION update_comment_counts(); -- 更新弹幕数量的触发器 CREATE OR REPLACE FUNCTION update_danmu_counts() RETURNS TRIGGER AS $$ BEGIN IF TG_OP = 'INSERT' THEN INSERT INTO ak_content_statistics (content_id, danmu_count) VALUES (NEW.content_id, 1) ON CONFLICT (content_id) DO UPDATE SET danmu_count = ak_content_statistics.danmu_count + 1, updated_at = NOW(); ELSIF TG_OP = 'DELETE' THEN UPDATE ak_content_statistics SET danmu_count = GREATEST(0, danmu_count - 1), updated_at = NOW() WHERE content_id = OLD.content_id; END IF; RETURN NULL; END; $$ LANGUAGE plpgsql; CREATE TRIGGER tr_danmu_counts AFTER INSERT OR DELETE ON ak_video_danmakus FOR EACH ROW EXECUTE FUNCTION update_danmu_counts(); -- 更新用户交互统计的触发器 CREATE OR REPLACE FUNCTION update_interaction_stats() RETURNS TRIGGER AS $$ BEGIN IF TG_OP = 'INSERT' THEN INSERT INTO ak_content_statistics (content_id) VALUES (NEW.content_id) ON CONFLICT (content_id) DO NOTHING; UPDATE ak_content_statistics SET view_count = CASE WHEN NEW.interaction_type = 'view' THEN view_count + 1 ELSE view_count END, like_count = CASE WHEN NEW.interaction_type = 'like' THEN like_count + 1 ELSE like_count END, favorite_count = CASE WHEN NEW.interaction_type = 'favorite' THEN favorite_count + 1 ELSE favorite_count END, share_count = CASE WHEN NEW.interaction_type = 'share' THEN share_count + 1 ELSE share_count END, updated_at = NOW() WHERE content_id = NEW.content_id; ELSIF TG_OP = 'DELETE' THEN UPDATE ak_content_statistics SET view_count = CASE WHEN OLD.interaction_type = 'view' THEN GREATEST(0, view_count - 1) ELSE view_count END, like_count = CASE WHEN OLD.interaction_type = 'like' THEN GREATEST(0, like_count - 1) ELSE like_count END, favorite_count = CASE WHEN OLD.interaction_type = 'favorite' THEN GREATEST(0, favorite_count - 1) ELSE favorite_count END, share_count = CASE WHEN OLD.interaction_type = 'share' THEN GREATEST(0, share_count - 1) ELSE share_count END, updated_at = NOW() WHERE content_id = OLD.content_id; END IF; RETURN NULL; END; $$ LANGUAGE plpgsql; CREATE TRIGGER tr_interaction_stats AFTER INSERT OR DELETE ON ak_user_interactions FOR EACH ROW EXECUTE FUNCTION update_interaction_stats(); -- ================================ -- RLS 安全策略 -- ================================ -- 启用 RLS ALTER TABLE ak_video_danmakus ENABLE ROW LEVEL SECURITY; ALTER TABLE ak_user_interactions ENABLE ROW LEVEL SECURITY; ALTER TABLE ak_content_comments ENABLE ROW LEVEL SECURITY; ALTER TABLE ak_comment_likes ENABLE ROW LEVEL SECURITY; ALTER TABLE ak_video_play_records ENABLE ROW LEVEL SECURITY; ALTER TABLE ak_danmu_reports ENABLE ROW LEVEL SECURITY; ALTER TABLE ak_image_tags ENABLE ROW LEVEL SECURITY; ALTER TABLE ak_image_view_records ENABLE ROW LEVEL SECURITY; -- 弹幕策略 CREATE POLICY "Public can view danmakus" ON ak_video_danmakus FOR SELECT USING (status = 'active' AND is_visible = true); CREATE POLICY "Users can insert own danmakus" ON ak_video_danmakus FOR INSERT WITH CHECK (auth.uid() = user_id); CREATE POLICY "Users can update own danmakus" ON ak_video_danmakus FOR UPDATE USING (auth.uid() = user_id); -- 用户交互策略 CREATE POLICY "Users can view own interactions" ON ak_user_interactions FOR SELECT USING (auth.uid() = user_id); CREATE POLICY "Users can insert own interactions" ON ak_user_interactions FOR INSERT WITH CHECK (auth.uid() = user_id); CREATE POLICY "Users can delete own interactions" ON ak_user_interactions FOR DELETE USING (auth.uid() = user_id); -- 评论策略 CREATE POLICY "Public can view active comments" ON ak_content_comments FOR SELECT USING (status = 'active'); CREATE POLICY "Users can insert own comments" ON ak_content_comments FOR INSERT WITH CHECK (auth.uid() = user_id); CREATE POLICY "Users can update own comments" ON ak_content_comments FOR UPDATE USING (auth.uid() = user_id); -- 播放记录策略 CREATE POLICY "Users can view own play records" ON ak_video_play_records FOR SELECT USING (auth.uid() = user_id); CREATE POLICY "Users can insert own play records" ON ak_video_play_records FOR INSERT WITH CHECK (auth.uid() = user_id); CREATE POLICY "Users can update own play records" ON ak_video_play_records FOR UPDATE USING (auth.uid() = user_id); -- 图片标签策略 CREATE POLICY "Public can view image tags" ON ak_image_tags FOR SELECT USING (true); CREATE POLICY "Users can add image tags" ON ak_image_tags FOR INSERT WITH CHECK (true); -- 允许所有认证用户添加标签 -- 图片浏览记录策略 CREATE POLICY "Users can view own image records" ON ak_image_view_records FOR SELECT USING (auth.uid() = user_id); CREATE POLICY "Users can insert own image records" ON ak_image_view_records FOR INSERT WITH CHECK (auth.uid() = user_id); -- ================================ -- 查询视图 -- ================================ -- 多媒体内容详情视图 CREATE OR REPLACE VIEW vw_media_content_detail AS SELECT c.id, c.content_type, -- 视频字段 c.video_url, c.video_duration, c.video_poster, c.video_width, c.video_height, c.video_size, c.video_format, c.video_quality, -- 音频字段 c.audio_url, c.audio_duration, c.audio_size, c.audio_format, c.audio_bitrate, c.audio_sample_rate, c.audio_cover, -- 图片字段 c.image_url, c.image_width, c.image_height, c.image_size, c.image_format, c.image_quality, c.image_alt_text, c.images, -- 通用字段 c.allow_danmu, c.allow_download, c.media_metadata, -- 统计字段 COALESCE(s.view_count, 0) as view_count, COALESCE(s.like_count, 0) as like_count, COALESCE(s.favorite_count, 0) as favorite_count, COALESCE(s.share_count, 0) as share_count, COALESCE(s.comment_count, 0) as comment_count, COALESCE(s.danmu_count, 0) as danmu_count, COALESCE(s.play_completion_rate, 0) as play_completion_rate, COALESCE(s.average_play_duration, 0) as average_play_duration, COALESCE(s.download_count, 0) as download_count, -- 检查当前用户是否已点赞、收藏 EXISTS(SELECT 1 FROM ak_user_interactions ui WHERE ui.content_id = c.id AND ui.user_id = auth.uid() AND ui.interaction_type = 'like') as is_liked, EXISTS(SELECT 1 FROM ak_user_interactions ui WHERE ui.content_id = c.id AND ui.user_id = auth.uid() AND ui.interaction_type = 'favorite') as is_favorited FROM ak_contents c LEFT JOIN ak_content_statistics s ON c.id = s.content_id; -- 视频内容详情视图（向后兼容） CREATE OR REPLACE VIEW vw_video_content_detail AS SELECT * FROM vw_media_content_detail WHERE content_type = 'video'; -- 音频内容详情视图 CREATE OR REPLACE VIEW vw_audio_content_detail AS SELECT * FROM vw_media_content_detail WHERE content_type = 'audio'; -- 图片内容详情视图 CREATE OR REPLACE VIEW vw_image_content_detail AS SELECT c.id, c.content_type, c.image_url, c.image_width, c.image_height, c.image_size, c.image_format, c.image_quality, c.image_alt_text, c.images, c.allow_download, c.media_metadata, COALESCE(s.view_count, 0) as view_count, COALESCE(s.like_count, 0) as like_count, COALESCE(s.favorite_count, 0) as favorite_count, COALESCE(s.share_count, 0) as share_count, COALESCE(s.comment_count, 0) as comment_count, COALESCE(s.download_count, 0) as download_count, -- 图片标签 ARRAY_AGG(DISTINCT it.tag_name) FILTER (WHERE it.tag_name IS NOT NULL) as tags, -- 检查当前用户是否已点赞、收藏 EXISTS(SELECT 1 FROM ak_user_interactions ui WHERE ui.content_id = c.id AND ui.user_id = auth.uid() AND ui.interaction_type = 'like') as is_liked, EXISTS(SELECT 1 FROM ak_user_interactions ui WHERE ui.content_id = c.id AND ui.user_id = auth.uid() AND ui.interaction_type = 'favorite') as is_favorited FROM ak_contents c LEFT JOIN ak_content_statistics s ON c.id = s.content_id LEFT JOIN ak_image_tags it ON c.id = it.content_id WHERE c.content_type = 'image' GROUP BY c.id, c.content_type, c.image_url, c.image_width, c.image_height, c.image_size, c.image_format, c.image_quality, c.image_alt_text, c.images, c.allow_download, c.media_metadata, s.view_count, s.like_count, s.favorite_count, s.share_count, s.comment_count, s.download_count; -- 弹幕列表视图（支持视频和音频） CREATE OR REPLACE VIEW vw_video_danmakus AS SELECT d.id, d.content_id, d.user_id, d.user_name, d.text, d.time_point, d.color, d.font_size, d.position_type, d.speed, d.is_visible, d.status, d.created_at, d.updated_at, c.content_type, -- 显示用户敏感信息（仅对自己的弹幕） CASE WHEN d.user_id = auth.uid() THEN d.ip_address ELSE NULL END as ip_address, CASE WHEN d.user_id = auth.uid() THEN d.user_agent ELSE NULL END as user_agent FROM ak_video_danmakus d JOIN ak_contents c ON d.content_id = c.id WHERE d.status = 'active' AND d.is_visible = true ORDER BY d.time_point ASC; -- 评论树形视图 CREATE OR REPLACE VIEW vw_content_comments AS WITH RECURSIVE comment_tree AS ( -- 主评论 SELECT c.*, 0 as level, ARRAY[c.created_at] as sort_path, EXISTS(SELECT 1 FROM ak_comment_likes cl WHERE cl.comment_id = c.id AND cl.user_id = auth.uid()) as is_liked_by_user FROM ak_content_comments c WHERE c.parent_id IS NULL AND c.status = 'active' UNION ALL -- 子评论 SELECT c.*, ct.level + 1, ct.sort_path || c.created_at, EXISTS(SELECT 1 FROM ak_comment_likes cl WHERE cl.comment_id = c.id AND cl.user_id = auth.uid()) as is_liked_by_user FROM ak_content_comments c JOIN comment_tree ct ON c.parent_id = ct.id WHERE c.status = 'active' AND ct.level < 3 -- 限制评论层级 ) SELECT * FROM comment_tree ORDER BY sort_path; -- 热门标签视图（图片专用） CREATE OR REPLACE VIEW vw_popular_image_tags AS SELECT tag_name, COUNT(*) as usage_count, tag_type, AVG(confidence) FILTER (WHERE confidence IS NOT NULL) as avg_confidence FROM ak_image_tags GROUP BY tag_name, tag_type ORDER BY usage_count DESC; -- 用户媒体消费统计视图 CREATE OR REPLACE VIEW vw_user_media_stats AS SELECT ui.user_id, COUNT(CASE WHEN c.content_type = 'video' THEN 1 END) as videos_watched, COUNT(CASE WHEN c.content_type = 'audio' THEN 1 END) as audios_listened, COUNT(CASE WHEN c.content_type = 'image' THEN 1 END) as images_viewed, SUM(CASE WHEN c.content_type IN ('video', 'audio') THEN vpr.play_duration ELSE 0 END) as total_play_time, AVG(CASE WHEN c.content_type IN ('video', 'audio') THEN vpr.play_percentage ELSE NULL END) as avg_completion_rate FROM ak_user_interactions ui LEFT JOIN ak_contents c ON ui.content_id = c.id LEFT JOIN ak_video_play_records vpr ON ui.content_id = vpr.content_id AND ui.user_id = vpr.user_id WHERE ui.interaction_type = 'view' GROUP BY ui.user_id; -- ================================ -- 兼容性检查和视图优化 -- ================================ -- 创建一个更安全的视图，只使用我们确定存在的列 -- 如果您的 ak_contents 表有更多列（如 title, content, excerpt 等）， -- 可以在部署后手动添加到视图中 -- 检查表结构的辅助函数 CREATE OR REPLACE FUNCTION check_column_exists(table_name TEXT, column_name TEXT) RETURNS BOOLEAN LANGUAGE plpgsql AS $$ BEGIN RETURN EXISTS ( SELECT 1 FROM information_schema.columns WHERE table_name = lower(table_name) AND column_name = lower(column_name) AND table_schema = current_schema() ); END; $$; -- ================================ -- 示例 RPC 函数：带内容类型校验的数据插入 -- ================================ -- 插入弹幕（带内容类型校验） CREATE OR REPLACE FUNCTION insert_danmu_with_validation( p_content_id UUID, p_content TEXT, p_time_position DECIMAL, p_color VARCHAR DEFAULT '#FFFFFF', p_font_size INTEGER DEFAULT 16, p_position_type VARCHAR DEFAULT 'scroll' ) RETURNS UUID LANGUAGE plpgsql SECURITY DEFINER AS $$ DECLARE v_content_type VARCHAR(20); v_danmu_id UUID; BEGIN -- 检查内容类型 SELECT content_type INTO v_content_type FROM ak_contents WHERE id = p_content_id; IF v_content_type IS NULL THEN RAISE EXCEPTION '内容不存在'; END IF; IF v_content_type NOT IN ('video', 'audio') THEN RAISE EXCEPTION '只有视频和音频内容支持弹幕功能'; END IF; -- 插入弹幕 INSERT INTO ak_video_danmakus ( content_id, user_id, user_name, text, time_point, color, font_size, position_type ) VALUES ( p_content_id, auth.uid(), COALESCE((SELECT email FROM auth.users WHERE id = auth.uid()), 'Anonymous'), p_content, p_time_position, p_color, p_font_size, p_position_type ) RETURNING id INTO v_danmu_id; RETURN v_danmu_id; END; $$; -- 插入图片标签（带内容类型校验） CREATE OR REPLACE FUNCTION insert_image_tag_with_validation( p_content_id UUID, p_tag_name VARCHAR, p_tag_type VARCHAR DEFAULT 'user', p_confidence DECIMAL DEFAULT NULL ) RETURNS UUID LANGUAGE plpgsql SECURITY DEFINER AS $$ DECLARE v_content_type VARCHAR(20); v_tag_id UUID; BEGIN -- 检查内容类型 SELECT content_type INTO v_content_type FROM ak_contents WHERE id = p_content_id; IF v_content_type IS NULL THEN RAISE EXCEPTION '内容不存在'; END IF; IF v_content_type != 'image' THEN RAISE EXCEPTION '只有图片内容支持标签功能'; END IF; -- 插入标签 INSERT INTO ak_image_tags ( content_id, tag_name, tag_type, confidence ) VALUES ( p_content_id, p_tag_name, p_tag_type, p_confidence ) RETURNING id INTO v_tag_id; RETURN v_tag_id; END; $$; -- 记录播放进度（带内容类型校验） CREATE OR REPLACE FUNCTION record_play_progress_with_validation( p_content_id UUID, p_play_position DECIMAL, p_play_duration DECIMAL DEFAULT 0, p_device_type VARCHAR DEFAULT NULL, p_resolution VARCHAR DEFAULT NULL, p_quality VARCHAR DEFAULT NULL ) RETURNS UUID LANGUAGE plpgsql SECURITY DEFINER AS $$ DECLARE v_content_type VARCHAR(20); v_record_id UUID; v_play_percentage DECIMAL(5,2); v_total_duration DECIMAL(10,3); BEGIN -- 检查内容类型和获取时长 SELECT content_type, CASE WHEN content_type = 'video' THEN video_duration WHEN content_type = 'audio' THEN audio_duration ELSE NULL END INTO v_content_type, v_total_duration FROM ak_contents WHERE id = p_content_id; IF v_content_type IS NULL THEN RAISE EXCEPTION '内容不存在'; END IF; IF v_content_type NOT IN ('video', 'audio') THEN RAISE EXCEPTION '只有视频和音频内容支持播放记录'; END IF; -- 计算播放百分比 IF v_total_duration IS NOT NULL AND v_total_duration > 0 THEN v_play_percentage = (p_play_position / v_total_duration) * 100; v_play_percentage = LEAST(v_play_percentage, 100); -- 限制最大100% ELSE v_play_percentage = 0; END IF; -- 插入或更新播放记录 INSERT INTO ak_video_play_records ( content_id, user_id, play_position, play_duration, play_percentage, is_completed, device_type, resolution, quality, media_type ) VALUES ( p_content_id, auth.uid(), p_play_position, p_play_duration, v_play_percentage, (v_play_percentage >= 95), p_device_type, p_resolution, p_quality, v_content_type ) ON CONFLICT (content_id, user_id) DO UPDATE SET play_position = EXCLUDED.play_position, play_duration = EXCLUDED.play_duration, play_percentage = EXCLUDED.play_percentage, is_completed = EXCLUDED.is_completed, updated_at = NOW() RETURNING id INTO v_record_id; RETURN v_record_id; END; $$; -- ================================ -- 模拟数据插入 -- ================================ -- 首先插入5个多媒体内容到 ak_contents 表 INSERT INTO ak_contents ( id, title, content, summary, status, content_type, original_language, quality_score, video_url, video_duration, video_poster, video_width, video_height, video_size, video_format, video_quality, audio_url, audio_duration, audio_size, audio_format, audio_bitrate, audio_sample_rate, audio_cover, image_url, image_width, image_height, image_size, image_format, image_quality, image_alt_text, images, allow_danmu, allow_download, media_metadata, published_at, updated_at ) VALUES -- 视频内容1 ( gen_random_uuid(), '星际征途：未来科幻大片', '一部震撼人心的科幻电影，讲述了人类在星际时代的冒险故事。导演张导演运用先进的特效技术，为观众呈现了一个令人惊叹的未来世界。这部影片不仅具有视觉冲击力，更在情感层面触动人心，是一部值得反复观看的科幻佳作。', '震撼人心的科幻电影，展现未来世界的冒险故事', 'published', 'video', 'zh-CN', 8.5, 'https://example.com/videos/sample-video-1.mp4', 1800, 'https://example.com/posters/video-1-poster.jpg', 1920, 1080, 524288000, 'mp4', '1080p', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, true, false, '{"director": "张导演", "genre": "科幻", "rating": 8.5, "year": 2024, "subtitle_languages": ["zh-CN", "en-US"], "tags": ["科幻", "冒险", "未来", "特效"]}', NOW() - INTERVAL '2 days', NOW() ), -- 视频内容2 ( gen_random_uuid(), '血战江湖：经典动作片', '李导演执导的动作大片，以精彩的打斗场面和紧张的剧情著称。影片采用实拍与特效相结合的方式，为观众带来视觉盛宴。每一个动作场面都经过精心设计，展现了中国功夫的精髓，是动作片爱好者不可错过的经典之作。', '李导演执导的动作大片，精彩打斗场面引人入胜', 'published', 'video', 'zh-CN', 9.2, 'https://example.com/videos/sample-video-2.mp4', 3600, 'https://example.com/posters/video-2-poster.jpg', 1920, 1080, 1048576000, 'mp4', '1080p', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, true, true, '{"director": "李导演", "genre": "动作", "rating": 9.2, "year": 2024, "subtitle_languages": ["zh-CN", "en-US", "ja-JP"], "tags": ["动作", "功夫", "江湖", "经典"]}', NOW() - INTERVAL '1 day', NOW() ), -- 音频内容1 ( gen_random_uuid(), '夜空中最亮的星 - 王歌手', '王歌手的最新单曲，旋律优美动听，歌词深情感人。这首歌曲融合了流行与民谣元素，展现了歌手成熟的音乐风格。歌曲以夜空为背景，表达了对理想和爱情的追求，是一首充满正能量的励志歌曲。', '王歌手最新单曲，旋律优美歌词深情', 'published', 'audio', 'zh-CN', 8.8, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 'https://example.com/audios/sample-audio-1.mp3', 240, 10485760, 'mp3', 320, 44100, 'https://example.com/covers/audio-1-cover.jpg', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, true, false, '{"artist": "王歌手", "album": "热门单曲", "genre": "流行", "year": 2024, "lyrics": true, "tags": ["流行", "励志", "爱情", "民谣"]}', NOW() - INTERVAL '3 days', NOW() ), -- 图片内容1 ( gen_random_uuid(), '杭州西湖美景摄影作品', '陈摄影师使用Canon EOS R5相机拍摄的西湖美景。照片完美捕捉了西湖的宁静与美丽，展现了中国古典园林的魅力。作品运用了经典的构图技巧，光影效果处理精美，是风景摄影的典型代表作品。', '陈摄影师拍摄的西湖美景，展现古典园林魅力', 'published', 'image', 'zh-CN', 9.0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 'https://example.com/images/sample-image-1.jpg', 2048, 1536, 2097152, 'jpg', 'original', '美丽的风景照片', NULL, false, true, '{"photographer": "陈摄影师", "location": "杭州西湖", "camera": "Canon EOS R5", "taken_at": "2024-06-15", "tags": ["风景", "西湖", "摄影", "古典"]}', NOW() - INTERVAL '5 days', NOW() ), -- 图集内容1 ( gen_random_uuid(), '云南旅行摄影图集', '李摄影师云南之行的精彩摄影作品集。从海边日落到山顶风光，再到城市夜景，每一张照片都记录了云南的美丽瞬间。这个图集展现了云南的多样性，从自然风光到人文景观，是一次完整的视觉旅行体验。', '李摄影师云南旅行摄影作品，记录美丽瞬间', 'published', 'image', 'zh-CN', 8.7, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 'https://example.com/images/gallery-1-cover.jpg', 1920, 1080, 1572864, 'jpg', 'original', '旅游图集封面', '[ { "url": "https://example.com/images/gallery-1-1.jpg", "width": 1920, "height": 1080, "size": 1572864, "alt": "海边日落", "order": 1, "description": "云南大理洱海日落美景" }, { "url": "https://example.com/images/gallery-1-2.jpg", "width": 1920, "height": 1080, "size": 1310720, "alt": "山顶风光", "order": 2, "description": "玉龙雪山山顶壮丽风光" }, { "url": "https://example.com/images/gallery-1-3.jpg", "width": 1920, "height": 1080, "size": 1835008, "alt": "城市夜景", "order": 3, "description": "昆明市区夜景璀璨灯火" } ]'::jsonb, false, true, '{"photographer": "李摄影师", "trip": "云南旅行", "total_images": 3, "created_date": "2024-06-20", "tags": ["旅行", "云南", "图集", "风光"]}', NOW() - INTERVAL '4 days', NOW() ); -- 获取插入的内容ID（用于后续插入统计数据） WITH inserted_contents AS ( SELECT id, content_type FROM ak_contents WHERE created_at >= NOW() - INTERVAL '1 hour' ORDER BY created_at DESC LIMIT 5 ) -- 为这些内容初始化统计数据 INSERT INTO ak_content_statistics ( content_id, view_count, like_count, favorite_count, share_count, comment_count, danmu_count, play_completion_rate, average_play_duration, download_count ) SELECT id, FLOOR(RANDOM() * 1000 + 100)::INTEGER, -- 100-1099 views FLOOR(RANDOM() * 200 + 10)::INTEGER, -- 10-209 likes FLOOR(RANDOM() * 50 + 5)::INTEGER, -- 5-54 favorites FLOOR(RANDOM() * 30 + 2)::INTEGER, -- 2-31 shares FLOOR(RANDOM() * 20 + 1)::INTEGER, -- 1-20 comments CASE WHEN content_type IN ('video', 'audio') THEN FLOOR(RANDOM() * 100 + 10)::INTEGER ELSE 0 END, -- 弹幕数 CASE WHEN content_type IN ('video', 'audio') THEN ROUND((RANDOM() * 30 + 70)::NUMERIC, 2) ELSE 0 END, -- 70-100% 完成率 CASE WHEN content_type IN ('video', 'audio') THEN ROUND((RANDOM() * 300 + 60)::NUMERIC, 3) ELSE 0 END, -- 平均播放时长 CASE WHEN content_type = 'image' THEN FLOOR(RANDOM() * 20 + 1)::INTEGER ELSE 0 END -- 下载次数 FROM inserted_contents; -- 为图片内容添加标签 WITH image_contents AS ( SELECT id FROM ak_contents WHERE content_type = 'image' AND created_at >= NOW() - INTERVAL '1 hour' LIMIT 2 ), image_with_row AS ( SELECT id, ROW_NUMBER() OVER (ORDER BY id) as rn FROM image_contents ), image_tags AS ( SELECT id, CASE WHEN rn = 1 THEN ARRAY['风景', '西湖', '自然', '摄影'] WHEN rn = 2 THEN ARRAY['旅游', '图集', '云南', '风光', '摄影'] END as tag_array FROM image_with_row ) INSERT INTO ak_image_tags (content_id, tag_name, tag_type, confidence) SELECT id, tag_name, 'user', NULL FROM image_tags CROSS JOIN LATERAL unnest(tag_array) AS tag_name; -- 添加一些示例弹幕（仅为视频和音频内容） WITH media_contents AS ( SELECT id, content_type FROM ak_contents WHERE content_type IN ('video', 'audio') AND created_at >= NOW() - INTERVAL '1 hour' LIMIT 3 ) INSERT INTO ak_video_danmakus ( content_id, user_id, user_name, text, time_point, color, font_size, position_type, status ) SELECT id, auth.uid(), '演示用户', CASE content_type WHEN 'video' THEN (ARRAY['太精彩了!', '画质真棒', '这个特效牛', '导演厉害', '期待续集'])[FLOOR(RANDOM() * 5 + 1)] WHEN 'audio' THEN (ARRAY['好听!', '单曲循环', '歌手唱功不错', '这首歌很有感觉', '音质很棒'])[FLOOR(RANDOM() * 5 + 1)] END, ROUND((RANDOM() * 300)::NUMERIC, 3), -- 随机时间点 (ARRAY['#FFFFFF', '#FF6B6B', '#4ECDC4', '#45B7D1', '#96CEB4'])[FLOOR(RANDOM() * 5 + 1)], -- 随机颜色 (ARRAY[16, 18, 20, 22, 24])[FLOOR(RANDOM() * 5 + 1)], -- 随机字体大小 (ARRAY['scroll', 'top', 'bottom'])[FLOOR(RANDOM() * 3 + 1)], -- 随机位置 'active' FROM media_contents, generate_series(1, 3) -- 每个媒体内容生成3条弹幕 WHERE id IS NOT NULL; -- 添加一些示例评论 WITH all_contents AS ( SELECT id FROM ak_contents WHERE created_at >= NOW() - INTERVAL '1 hour' LIMIT 5 ) INSERT INTO ak_content_comments ( content_id, user_id, user_name, content, status ) SELECT id, auth.uid(), '评论用户', (ARRAY[ '这个内容质量很高，值得推荐！', '制作精良，很有意思。', '感谢分享，学到了很多。', '希望能看到更多这样的作品。', '内容很棒，期待更新！' ])[FLOOR(RANDOM() * 5 + 1)], 'active' FROM all_contents, generate_series(1, 2) -- 每个内容生成2条评论 WHERE id IS NOT NULL; -- 添加示例用户交互（点赞、收藏等） WITH all_contents AS ( SELECT id FROM ak_contents WHERE created_at >= NOW() - INTERVAL '1 hour' LIMIT 5 ) INSERT INTO ak_user_interactions ( user_id, content_id, interaction_type, interaction_data ) SELECT auth.uid(), id, interaction_type, CASE interaction_type WHEN 'share' THEN jsonb_build_object('platform', 'weibo', 'shared_at', NOW()) WHEN 'favorite' THEN jsonb_build_object('folder', '我的收藏', 'added_at', NOW()) ELSE '{}'::jsonb END FROM all_contents CROSS JOIN ( VALUES ('like'), ('favorite'), ('view'), ('share') ) AS interactions(interaction_type) WHERE id IS NOT NULL; -- 模拟数据插入完成 -- 已成功插入5个多媒体内容（2个视频、1个音频、2个图片/图集） -- 包含完整的统计数据、标签、弹幕、评论和用户交互记录 -- 允许所有用户（包括 anon）插入播放记录 CREATE POLICY "Anon can insert play records" ON ak_video_play_records FOR INSERT WITH CHECK (true); -- 应用策略 ALTER TABLE ak_video_play_records ENABLE ROW LEVEL SECURITY; -- 认证用户只能插入自己的记录 CREATE POLICY "Users can insert own play records" ON ak_video_play_records FOR INSERT WITH CHECK (auth.uid() = user_id); CREATE POLICY "Anon can insert play records" ON ak_video_play_records FOR INSERT WITH CHECK ( (auth.role() = 'anon' AND user_id = '00000000-0000-0000-0000-000000000000') OR (auth.role() = 'anon' AND user_id IS NULL) );