42 lines
1.3 KiB
SQL
42 lines
1.3 KiB
SQL
CREATE TABLE posts (
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id SERIAL PRIMARY KEY,
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author_id INT NOT NULL REFERENCES users(id) ON DELETE RESTRICT,
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title VARCHAR(200) NOT NULL,
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slug VARCHAR(200) NOT NULL,
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summary VARCHAR(500),
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content_md TEXT NOT NULL,
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content_html TEXT,
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cover_image VARCHAR(500),
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status TEXT NOT NULL DEFAULT 'draft',
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published_at TIMESTAMPTZ,
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created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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deleted_at TIMESTAMPTZ,
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CONSTRAINT posts_status_check CHECK (status IN ('draft', 'published'))
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);
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CREATE INDEX idx_posts_status_published ON posts(status, published_at DESC) WHERE deleted_at IS NULL;
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CREATE INDEX idx_posts_slug ON posts(slug) WHERE deleted_at IS NULL;
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CREATE UNIQUE INDEX idx_posts_slug_unique ON posts(slug) WHERE deleted_at IS NULL;
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CREATE TABLE tags (
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id SERIAL PRIMARY KEY,
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name VARCHAR(50) UNIQUE NOT NULL
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);
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CREATE TABLE post_tags (
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post_id INT NOT NULL REFERENCES posts(id) ON DELETE CASCADE,
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tag_id INT NOT NULL REFERENCES tags(id) ON DELETE CASCADE,
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PRIMARY KEY (post_id, tag_id)
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);
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CREATE INDEX idx_post_tags_post ON post_tags(post_id);
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CREATE INDEX idx_post_tags_tag ON post_tags(tag_id);
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-- 为封面图添加索引
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CREATE INDEX idx_posts_cover ON posts(cover_image) WHERE cover_image IS NOT NULL; |