45 lines
2.1 KiB
SQL
45 lines
2.1 KiB
SQL
-- 创建公告表
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CREATE TABLE IF NOT EXISTS announcements (
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id BIGSERIAL PRIMARY KEY,
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title VARCHAR(200) NOT NULL,
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content TEXT NOT NULL,
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status VARCHAR(20) NOT NULL DEFAULT 'draft',
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targeting JSONB NOT NULL DEFAULT '{}'::jsonb,
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starts_at TIMESTAMPTZ DEFAULT NULL,
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ends_at TIMESTAMPTZ DEFAULT NULL,
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created_by BIGINT DEFAULT NULL REFERENCES users(id) ON DELETE SET NULL,
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updated_by BIGINT DEFAULT NULL REFERENCES users(id) ON DELETE SET NULL,
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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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);
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-- 公告已读表
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CREATE TABLE IF NOT EXISTS announcement_reads (
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id BIGSERIAL PRIMARY KEY,
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announcement_id BIGINT NOT NULL REFERENCES announcements(id) ON DELETE CASCADE,
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user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
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read_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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UNIQUE(announcement_id, user_id)
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);
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-- 索引
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CREATE INDEX IF NOT EXISTS idx_announcements_status ON announcements(status);
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CREATE INDEX IF NOT EXISTS idx_announcements_starts_at ON announcements(starts_at);
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CREATE INDEX IF NOT EXISTS idx_announcements_ends_at ON announcements(ends_at);
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CREATE INDEX IF NOT EXISTS idx_announcements_created_at ON announcements(created_at);
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CREATE INDEX IF NOT EXISTS idx_announcement_reads_announcement_id ON announcement_reads(announcement_id);
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CREATE INDEX IF NOT EXISTS idx_announcement_reads_user_id ON announcement_reads(user_id);
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CREATE INDEX IF NOT EXISTS idx_announcement_reads_read_at ON announcement_reads(read_at);
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COMMENT ON TABLE announcements IS '系统公告';
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COMMENT ON COLUMN announcements.status IS '状态: draft, active, archived';
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COMMENT ON COLUMN announcements.targeting IS '展示条件（JSON 规则）';
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COMMENT ON COLUMN announcements.starts_at IS '开始展示时间（为空表示立即生效）';
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COMMENT ON COLUMN announcements.ends_at IS '结束展示时间（为空表示永久生效）';
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COMMENT ON TABLE announcement_reads IS '公告已读记录';
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COMMENT ON COLUMN announcement_reads.read_at IS '用户首次已读时间';
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