SQL DDLからDrizzle ORMスキーマへのジェネレーター（PostgreSQL、MySQL、SQLite）

import {
  boolean,
  index,
  integer,
  jsonb,
  numeric,
  pgEnum,
  pgTable,
  serial,
  text,
  timestamp,
  uniqueIndex,
  uuid,
  varchar
} from 'drizzle-orm/pg-core';
import { relations } from 'drizzle-orm';
import { createSelectSchema, createInsertSchema } from 'drizzle-zod';

// Enums
export const userRoleEnum = pgEnum('user_role', ['CUSTOMER', 'ADMIN', 'VENDOR']);

export const orderStatusEnum = pgEnum('order_status', ['PENDING', 'PAID', 'PROCESSING', 'SHIPPED', 'DELIVERED', 'CANCELLED']);


// Tables
export const users = pgTable('users', {
  id: uuid('id').defaultRandom().primaryKey(),
  email: varchar('email', { length: 255 }).notNull().unique(),
  fullName: varchar('full_name', { length: 120 }),
  role: userRoleEnum('role').notNull().default('CUSTOMER'),
  isActive: boolean('is_active').notNull().default(true),
  metadata: jsonb('metadata'),
  createdAt: timestamp('created_at', { withTimezone: true, mode: 'date' }).notNull().defaultNow(),
  updatedAt: timestamp('updated_at', { withTimezone: true, mode: 'date' }).notNull().defaultNow(),
});

export const userProfiles = pgTable('user_profiles', {
  id: uuid('id').defaultRandom().primaryKey(),
  userId: uuid('user_id').notNull().unique().references(() => users.id, { onDelete: 'cascade' }),
  avatarUrl: varchar('avatar_url', { length: 500 }),
  phone: varchar('phone', { length: 30 }),
  shippingAddress: text('shipping_address'),
  taxIdentifier: varchar('tax_identifier', { length: 50 }),
});

export const products = pgTable('products', {
  id: serial('id').primaryKey(),
  sku: varchar('sku', { length: 64 }).notNull().unique(),
  title: varchar('title', { length: 200 }).notNull(),
  description: text('description'),
  price: numeric('price', { precision: 10, scale: 2 }).notNull().default(0.00),
  inventory: integer('inventory').notNull().default(0),
  isPublished: boolean('is_published').notNull().default(true),
  createdAt: timestamp('created_at', { withTimezone: true, mode: 'date' }).notNull().defaultNow(),
}, (table) => [
  index('idx_products_sku').on(table.sku)
]);

export const orders = pgTable('orders', {
  id: uuid('id').defaultRandom().primaryKey(),
  customerId: uuid('customer_id').notNull().references(() => users.id, { onDelete: 'restrict' }),
  orderNumber: varchar('order_number', { length: 64 }).notNull().unique(),
  status: orderStatusEnum('status').notNull().default('PENDING'),
  totalAmount: numeric('total_amount', { precision: 12, scale: 2 }).notNull().default(0.00),
  notes: text('notes'),
  createdAt: timestamp('created_at', { withTimezone: true, mode: 'date' }).notNull().defaultNow(),
}, (table) => [
  index('idx_orders_customer').on(table.customerId)
]);

export const orderItems = pgTable('order_items', {
  id: serial('id').primaryKey(),
  orderId: uuid('order_id').notNull().references(() => orders.id, { onDelete: 'cascade' }),
  productId: integer('product_id').notNull().references(() => products.id, { onDelete: 'restrict' }),
  quantity: integer('quantity').notNull().default(1),
  unitPrice: numeric('unit_price', { precision: 10, scale: 2 }).notNull(),
}, (table) => [
  uniqueIndex('uq_order_product').on(table.orderId, table.productId)
]);


// Relations
export const usersRelations = relations(users, ({ many }) => ({
  userProfileses: many(userProfiles),
  orderses: many(orders),
}));

export const userProfilesRelations = relations(userProfiles, ({ one }) => ({
  user: one(users, {
    fields: [userProfiles.userId],
    references: [users.id],
  }),
}));

export const productsRelations = relations(products, ({ many }) => ({
  orderItemses: many(orderItems),
}));

export const ordersRelations = relations(orders, ({ one, many }) => ({
  customer: one(users, {
    fields: [orders.customerId],
    references: [users.id],
  }),
  orderItemses: many(orderItems),
}));

export const orderItemsRelations = relations(orderItems, ({ one }) => ({
  order: one(orders, {
    fields: [orderItems.orderId],
    references: [orders.id],
  }),
  product: one(products, {
    fields: [orderItems.productId],
    references: [products.id],
  }),
}));


// TypeScript Inferred Types
export type User = typeof users.$inferSelect;
export type NewUser = typeof users.$inferInsert;
export type UserProfile = typeof userProfiles.$inferSelect;
export type NewUserProfile = typeof userProfiles.$inferInsert;
export type Product = typeof products.$inferSelect;
export type NewProduct = typeof products.$inferInsert;
export type Order = typeof orders.$inferSelect;
export type NewOrder = typeof orders.$inferInsert;
export type OrderItem = typeof orderItems.$inferSelect;
export type NewOrderItem = typeof orderItems.$inferInsert;

// Drizzle-Zod Schemas
export const selectUserSchema = createSelectSchema(users);
export const insertUserSchema = createInsertSchema(users);
export const selectUserProfileSchema = createSelectSchema(userProfiles);
export const insertUserProfileSchema = createInsertSchema(userProfiles);
export const selectProductSchema = createSelectSchema(products);
export const insertProductSchema = createInsertSchema(products);
export const selectOrderSchema = createSelectSchema(orders);
export const insertOrderSchema = createInsertSchema(orders);
export const selectOrderItemSchema = createSelectSchema(orderItems);
export const insertOrderItemSchema = createInsertSchema(orderItems);