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server/.ai-specs/sys-specs/business-table-spec.md
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# 业务表 SQL 规范
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## 适用范围
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- 当任务是新增/修改 `.ai-specs/doc-sql/*.md` 时,先读本文件。
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- 当前项目关系型数据库默认是 `PostgreSQL`,`doc-sql` 的 `建议 SQL` 默认输出 `PostgreSQL` 写法。
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- 涉及状态、类型、级别、来源、模式、分类等值域字段时,必须先读 `.ai-specs/sys-specs/business-dictionary-spec.md`,并先补 `.ai-specs/doc-dict/<dict-code>.md`。
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## 强制输出
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- 文档路径固定:`.ai-specs/doc-sql/<table_name>.md`
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- 文档结构固定只保留:`# 标题`、`## 基本信息`、`## 建议 SQL`
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- `## 基本信息` 固定顺序:`模块` → `表名` → `模型` → `迁移接入` → 按需补 `字典` 行 → `职责`
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- 有字典字段时,每个字典单独占一行:`- <字段中文名>字典:\`<dict-code>\``
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- `## 建议 SQL` 前的说明固定写为:`> 以下 SQL 以当前项目 PostgreSQL 为准,主要表达字段、约束和索引语义;实际落库以 \`GORM Model\` 和 \`initialize/gorm_biz.go\` 为准。`
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- `SQL` 代码块固定按这个顺序组织:`CREATE TABLE` → `COMMENT ON TABLE` → `COMMENT ON COLUMN` → `CREATE UNIQUE INDEX` / `CREATE INDEX`
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- 表名、字段名、索引名统一使用 `snake_case`
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- 唯一索引命名固定:`uk_<table_name>_<field>`
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- 普通索引命名固定:`idx_<table_name>_<field>`
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- 字典字段只存字典项 `Value`,禁止存 `Label`
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- 文档只写已确认字段、约束、索引;禁止再补 `字段设计`、`索引设计`、`关联关系`、`删除与兼容`、`自检` 等重复章节
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## PostgreSQL 写法
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- 主键自增优先写 `bigserial PRIMARY KEY`
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- 时间字段优先写 `timestamp with time zone`
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- 注释统一写 `COMMENT ON TABLE`、`COMMENT ON COLUMN`
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- 索引统一单独写 `CREATE UNIQUE INDEX`、`CREATE INDEX`
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- 禁止混入 `AUTO_INCREMENT`、反引号、`ENGINE=InnoDB`、行内 `COMMENT`、`UNIQUE KEY`、`KEY ...` 等 `MySQL` 方言
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## 输出模板
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````md
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# <表中文名>
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## 基本信息
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- 模块:<module>
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- 表名:`<table_name>`
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- 模型:`model/<module>/<file>.go`
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- 迁移接入:`initialize/gorm_biz.go`
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- <字段中文名>字典:`<dict-code>`
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- 职责:<一句话职责>
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## 建议 SQL
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> 以下 SQL 以当前项目 PostgreSQL 为准,主要表达字段、约束和索引语义;实际落库以 `GORM Model` 和 `initialize/gorm_biz.go` 为准。
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```sql
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CREATE TABLE <table_name> (
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id bigserial PRIMARY KEY,
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created_at timestamp with time zone NOT NULL DEFAULT CURRENT_TIMESTAMP,
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updated_at timestamp with time zone NOT NULL DEFAULT CURRENT_TIMESTAMP,
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<field_1> <type> <constraint>,
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<field_2> <type>
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);
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COMMENT ON TABLE <table_name> IS '<表中文名>';
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COMMENT ON COLUMN <table_name>.id IS '主键';
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COMMENT ON COLUMN <table_name>.created_at IS '创建时间';
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COMMENT ON COLUMN <table_name>.updated_at IS '更新时间';
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COMMENT ON COLUMN <table_name>.<field_1> IS '<字段说明>';
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COMMENT ON COLUMN <table_name>.<field_2> IS '<字段说明>';
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CREATE UNIQUE INDEX uk_<table_name>_<field_1> ON <table_name> (<field_1>);
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CREATE INDEX idx_<table_name>_<field_2> ON <table_name> (<field_2>);
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```
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````
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- 没有字典字段,就删除对应“字典”行
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- 没有唯一索引或普通索引,就删除对应 SQL 行
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- 如果字段默认值来自字典,直接写字典项 `Value`,例如 `DEFAULT 'enabled'`
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## 复刻目标
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- 只看本文件,应能直接写出类似 `.ai-specs/doc-sql/book_author.md` 的文档
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- 先定字典,再写 `doc-sql`,再进入 `Model`、迁移和业务代码
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