37 lines
1.2 KiB
SQL
37 lines
1.2 KiB
SQL
-- 迁移写作风格从项目级别到用户级别
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-- 将 writing_styles 表的 project_id 字段改为 user_id
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-- 步骤1: 添加新的 user_id 字段
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ALTER TABLE writing_styles ADD COLUMN user_id VARCHAR(255);
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-- 步骤2: 将现有数据从 project_id 映射到 user_id
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-- 通过 projects 表关联，将项目的用户ID填充到风格的 user_id
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UPDATE writing_styles ws
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SET user_id = (
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SELECT p.user_id
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FROM projects p
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WHERE p.id = ws.project_id
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)
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WHERE ws.project_id IS NOT NULL;
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-- 步骤3: 添加外键约束
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ALTER TABLE writing_styles
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ADD CONSTRAINT fk_writing_styles_user
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FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE;
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-- 步骤4: 删除旧的 project_id 外键约束
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ALTER TABLE writing_styles DROP CONSTRAINT IF EXISTS writing_styles_project_id_fkey;
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-- 步骤5: 删除 project_id 列
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ALTER TABLE writing_styles DROP COLUMN project_id;
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-- 步骤6: 更新注释
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COMMENT ON COLUMN writing_styles.user_id IS '所属用户ID（NULL表示全局预设风格）';
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-- 验证迁移结果
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SELECT
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COUNT(*) as total_styles,
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COUNT(user_id) as user_styles,
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COUNT(*) FILTER (WHERE user_id IS NULL) as preset_styles
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FROM writing_styles;
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