DESKTOP-L8OUL9F\gfl0034
ce9c7a13aa
一方关注只记关注。双方互关时写入已有双向好友边；取消关注若不再互关只删好友边，不删消息。 Co-authored-by: Cursor <cursoragent@cursor.com>
12 lines
681 B
SQL
12 lines
681 B
SQL
-- One directed follow per pair. Mutual follows become friend edges in logic; unfollowing does not delete messages.
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CREATE TABLE IF NOT EXISTS t_user_follows (
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id BIGINT NOT NULL AUTO_INCREMENT COMMENT '行 id，表内自增',
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user_id BIGINT NOT NULL COMMENT '关注人 user_id',
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target_id BIGINT NOT NULL COMMENT '被关注人 user_id',
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created_at DATETIME(3) NOT NULL COMMENT '关注时间',
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PRIMARY KEY (id),
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UNIQUE KEY uk_user_target (user_id, target_id),
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KEY idx_target (target_id)
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) COMMENT='单向关注。双方互相关注时写入已有双向好友边；取消关注只删关注，不再互关时删好友边，不删消息';
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