优化表单验证错误处理

tone-page-server/src/main.ts

@@ -1,11 +1,25 @@
 import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
-import { ValidationPipe } from '@nestjs/common';
+import { BadRequestException, ValidationPipe } from '@nestjs/common';
 import { ResponseInterceptor } from './common/interceptors/response.interceptor';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
-  app.useGlobalPipes(new ValidationPipe({ transform: true, whitelist: true }));
+  app.useGlobalPipes(new ValidationPipe({
+    transform: true,
+    whitelist: true,
+    stopAtFirstError: true,
+    exceptionFactory: (errors) => {
+      const error = errors[0];
+      const firstConstraint = error.constraints ? Object.values(error.constraints)[0] : '验证失败';
+
+      throw new BadRequestException({
+        message: firstConstraint,
+        error: 'Bad Request',
+        statusCode: 400
+      });
+    }
+  }));
   app.useGlobalInterceptors(new ResponseInterceptor());
   await app.listen(process.env.PORT ?? 3001);
 }