实现了AI助手

prisma/migrations/20250623095809_add_ai_conversations_json/migration.sql

@@ -0,0 +1,14 @@
+-- CreateTable
+CREATE TABLE "conversations" (
+    "id" TEXT NOT NULL,
+    "title" TEXT,
+    "messages" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "userId" TEXT NOT NULL,
+
+    CONSTRAINT "conversations_pkey" PRIMARY KEY ("id")
+);
+
+-- AddForeignKey
+ALTER TABLE "conversations" ADD CONSTRAINT "conversations_userId_fkey" FOREIGN KEY ("userId") REFERENCES "users"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/schema.prisma

@@ -22,8 +22,9 @@ model User {
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
   
-  orders    Order[]
-  cartItems CartItem[]
+  orders         Order[]
+  cartItems      CartItem[]
+  conversations  Conversation[]
   
   @@map("users")
 }
@@ -114,3 +115,16 @@ enum OrderStatus {
   DELIVERED
   CANCELLED
 }
+
+model Conversation {
+  id        String   @id @default(cuid())
+  title     String?  // 对话标题，可以根据第一个用户消息生成
+  messages  String   // 存储完整的消息历史的JSON数据
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  
+  userId    String
+  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  
+  @@map("conversations")
+}