27 lines
1.2 KiB
MySQL
27 lines
1.2 KiB
MySQL
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-- 章节拆分为 chapter_sections：每段正文 + 配图独立存储，chapters 只保留封面图
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-- 执行顺序: 1) 本文件 2) python -m scripts.migrate_chapters_to_sections
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-- 执行方式: psql -U <user> -d <database> -f api/migrations/add_chapter_sections.sql
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-- ========== 1. 新建 chapter_sections 表 ==========
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CREATE TABLE IF NOT EXISTS chapter_sections (
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id VARCHAR NOT NULL PRIMARY KEY,
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chapter_id VARCHAR NOT NULL REFERENCES chapters(id) ON DELETE CASCADE,
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order_index INTEGER NOT NULL,
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content TEXT NOT NULL,
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image JSONB,
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updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
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);
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CREATE INDEX IF NOT EXISTS ix_chapter_sections_chapter_id ON chapter_sections(chapter_id);
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CREATE INDEX IF NOT EXISTS ix_chapter_sections_order ON chapter_sections(chapter_id, order_index);
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-- ========== 2. chapters 表增加 cover_image ==========
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DO $$
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BEGIN
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IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_schema = 'public' AND table_name = 'chapters' AND column_name = 'cover_image') THEN
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ALTER TABLE chapters ADD COLUMN cover_image JSONB;
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RAISE NOTICE '已添加 chapters.cover_image';
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END IF;
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END $$;
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-- ========== 3. 回填与删列由脚本 scripts.migrate_chapters_to_sections 完成 ==========
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