数据库迁移

migrations/000004_drop_legacy_user_order.down.sql

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+-- 000004_drop_legacy_user_order.down.sql
+-- 说明：回滚时恢复 legacy 用户/订单表（与历史 000001_init_schema 一致）。
+
+BEGIN;
+
+-- 恢复用户表
+CREATE TABLE IF NOT EXISTS tb_user (
+    id SERIAL PRIMARY KEY,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    deleted_at TIMESTAMP,
+
+    -- 基本信息
+    username VARCHAR(50) NOT NULL,
+    email VARCHAR(100) NOT NULL,
+    password VARCHAR(255) NOT NULL,
+
+    -- 状态字段
+    status VARCHAR(20) NOT NULL DEFAULT 'active',
+
+    -- 元数据
+    last_login_at TIMESTAMP,
+
+    -- 唯一约束
+    CONSTRAINT uk_user_username UNIQUE (username),
+    CONSTRAINT uk_user_email UNIQUE (email)
+);
+
+-- 恢复订单表
+CREATE TABLE IF NOT EXISTS tb_order (
+    id SERIAL PRIMARY KEY,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    deleted_at TIMESTAMP,
+
+    -- 业务唯一键
+    order_id VARCHAR(50) NOT NULL,
+
+    -- 关联关系（注意：无数据库外键约束，在代码中管理）
+    user_id INTEGER NOT NULL,
+
+    -- 订单信息
+    amount BIGINT NOT NULL,
+    status VARCHAR(20) NOT NULL DEFAULT 'pending',
+    remark VARCHAR(500),
+
+    -- 时间字段
+    paid_at TIMESTAMP,
+    completed_at TIMESTAMP,
+
+    -- 唯一约束
+    CONSTRAINT uk_order_order_id UNIQUE (order_id)
+);
+
+-- 索引恢复
+CREATE INDEX IF NOT EXISTS idx_user_deleted_at ON tb_user(deleted_at);
+CREATE INDEX IF NOT EXISTS idx_user_status ON tb_user(status);
+CREATE INDEX IF NOT EXISTS idx_user_created_at ON tb_user(created_at);
+
+CREATE INDEX IF NOT EXISTS idx_order_deleted_at ON tb_order(deleted_at);
+CREATE INDEX IF NOT EXISTS idx_order_user_id ON tb_order(user_id);
+CREATE INDEX IF NOT EXISTS idx_order_status ON tb_order(status);
+CREATE INDEX IF NOT EXISTS idx_order_created_at ON tb_order(created_at);
+
+-- 注释恢复
+COMMENT ON TABLE tb_user IS '用户表';
+COMMENT ON COLUMN tb_user.username IS '用户名（唯一）';
+COMMENT ON COLUMN tb_user.email IS '邮箱（唯一）';
+COMMENT ON COLUMN tb_user.password IS '密码（bcrypt 哈希）';
+COMMENT ON COLUMN tb_user.status IS '用户状态：active, inactive, suspended';
+COMMENT ON COLUMN tb_user.deleted_at IS '软删除时间';
+
+COMMENT ON TABLE tb_order IS '订单表';
+COMMENT ON COLUMN tb_order.order_id IS '订单号（业务唯一键）';
+COMMENT ON COLUMN tb_order.user_id IS '用户 ID（在代码中维护关联，无数据库外键）';
+COMMENT ON COLUMN tb_order.amount IS '金额（分）';
+COMMENT ON COLUMN tb_order.status IS '订单状态：pending, paid, processing, completed, cancelled';
+COMMENT ON COLUMN tb_order.deleted_at IS '软删除时间';
+
+COMMIT;
+
+-- 占位，避免空事务报错
+SELECT 1;