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41 lines
1.8 KiB
Go
41 lines
1.8 KiB
Go
-- # 书籍章节表
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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_chapter
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-- 模型：model/book/book_chapter.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：承载书籍章节发布单元、章节文件地址和阅读锚点基础信息，保证同一本书内章节编号稳定且唯一。
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CREATE TABLE book_chapter (
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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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title varchar(255) NOT NULL,
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chapter_no integer NOT NULL CHECK (chapter_no > 0),
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is_readable boolean NOT NULL DEFAULT false,
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content_file_url varchar(500) NOT NULL,
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total_lines integer NOT NULL DEFAULT 0 CHECK (total_lines >= 0),
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is_enabled boolean NOT NULL DEFAULT true,
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CHECK (NOT is_readable OR total_lines > 0)
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);
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COMMENT ON TABLE book_chapter IS '书籍章节表';
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COMMENT ON COLUMN book_chapter.id IS '主键';
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COMMENT ON COLUMN book_chapter.created_at IS '创建时间';
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COMMENT ON COLUMN book_chapter.updated_at IS '更新时间';
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COMMENT ON COLUMN book_chapter.book_id IS '所属书籍 ID';
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COMMENT ON COLUMN book_chapter.title IS '章节标题';
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COMMENT ON COLUMN book_chapter.chapter_no IS '同书内章节顺序编号';
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COMMENT ON COLUMN book_chapter.is_readable IS '是否对 app 端开放阅读';
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COMMENT ON COLUMN book_chapter.content_file_url IS '章节内容文件 URL';
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COMMENT ON COLUMN book_chapter.total_lines IS '章节正文总行数';
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COMMENT ON COLUMN book_chapter.is_enabled IS '章节是否启用';
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CREATE UNIQUE INDEX uk_book_chapter_book_id_chapter_no ON book_chapter (book_id, chapter_no);
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CREATE INDEX idx_book_chapter_book_id_is_enabled_is_readable ON book_chapter (book_id, is_enabled, is_readable);
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CREATE INDEX idx_book_chapter_created_at ON book_chapter (created_at);
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