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32 lines
1.4 KiB
Go
32 lines
1.4 KiB
Go
-- # 书籍作者关联表
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--
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-- ## 基本信息
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--
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-- 模块：book
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-- 表名：book_author_relation
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-- 模型：model/book/book_author_relation.go
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-- 迁移接入：initialize/gorm_biz.go
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-- 删除策略：硬删表
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-- 职责：承载书籍与作者的多对多关系及展示顺序，保证同一本书下作者关联唯一。
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CREATE TABLE book_author_relation (
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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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book_id bigint NOT NULL,
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author_id bigint NOT NULL,
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author_sort integer NOT NULL DEFAULT 1 CHECK (author_sort > 0)
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);
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COMMENT ON TABLE book_author_relation IS '书籍作者关联表';
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COMMENT ON COLUMN book_author_relation.id IS '主键';
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COMMENT ON COLUMN book_author_relation.created_at IS '创建时间';
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COMMENT ON COLUMN book_author_relation.updated_at IS '更新时间';
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COMMENT ON COLUMN book_author_relation.book_id IS '关联书籍 ID';
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COMMENT ON COLUMN book_author_relation.author_id IS '关联作者 ID';
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COMMENT ON COLUMN book_author_relation.author_sort IS '作者展示顺序';
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CREATE UNIQUE INDEX uk_book_author_relation_book_id_author_id ON book_author_relation (book_id, author_id);
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CREATE INDEX idx_book_author_relation_author_id ON book_author_relation (author_id);
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CREATE INDEX idx_book_author_relation_book_id_author_sort ON book_author_relation (book_id, author_sort);
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