33 lines
1.6 KiB
MySQL
33 lines
1.6 KiB
MySQL
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-- 图片独立表：将原先挤在 chapter.cover_image / chapter_sections.image 的 JSON 拆成独立列
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-- 执行顺序: 1) 本文件 2) python -m api.scripts.run_memoir_images_migration
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-- 执行方式: psql -U <user> -d <database> -f api/migrations/add_memoir_images_table.sql
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-- ========== 1. 新建 memoir_images 表 ==========
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CREATE TABLE IF NOT EXISTS memoir_images (
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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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section_id VARCHAR NULL REFERENCES chapter_sections(id) ON DELETE CASCADE,
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order_index INTEGER NOT NULL DEFAULT 0,
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placeholder TEXT,
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description TEXT,
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status VARCHAR NOT NULL DEFAULT 'pending',
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prompt TEXT,
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url TEXT,
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storage_key TEXT,
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provider VARCHAR,
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style VARCHAR,
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size VARCHAR,
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error TEXT,
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retryable BOOLEAN,
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created_at TIMESTAMP WITH TIME ZONE,
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updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
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);
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COMMENT ON TABLE memoir_images IS '章节配图与封面：section_id 为空表示章节封面，非空表示该 section 的配图';
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COMMENT ON COLUMN memoir_images.order_index IS '章节内唯一：封面=0，段落配图=1,2,3,...（对应 section.order_index+1）';
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CREATE INDEX IF NOT EXISTS ix_memoir_images_chapter_id ON memoir_images(chapter_id);
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CREATE INDEX IF NOT EXISTS ix_memoir_images_section_id ON memoir_images(section_id);
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CREATE UNIQUE INDEX IF NOT EXISTS ix_memoir_images_chapter_cover ON memoir_images(chapter_id) WHERE section_id IS NULL;
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CREATE UNIQUE INDEX IF NOT EXISTS ix_memoir_images_section_unique ON memoir_images(section_id) WHERE section_id IS NOT NULL;
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