pipe

things/nest-typeorm/src/utility/pipes.ts

 import { ValidationPipe } from '@nestjs/common';
+import { ClassConstructor, plainToClass } from 'class-transformer';
 
 export const CreatePipe = new ValidationPipe({
   transform: true,
-  transformOptions: { groups: ['c'] },
+  transformOptions: { groups: ['c'], enableImplicitConversion: true },
 });
 
 export const GetPipe = new ValidationPipe({
@@ -13,9 +14,28 @@ export const GetPipe = new ValidationPipe({
   skipUndefinedProperties: true,
 });
 
+export class ClassGetPipe<T> extends ValidationPipe {
+  constructor(private readonly classConstructor: ClassConstructor<T>) {
+    super({
+      transform: false,
+      skipMissingProperties: true,
+      skipNullProperties: true,
+      skipUndefinedProperties: true,
+    });
+  }
+
+  override async transform(value: any, metadata: any) {
+    const obj = await super.transform(value, metadata);
+    return plainToClass(this.classConstructor, obj, {
+      groups: ['r'],
+      enableImplicitConversion: true,
+    });
+  }
+}
+
 export const UpdatePipe = new ValidationPipe({
   transform: true,
-  transformOptions: { groups: ['u'] },
+  transformOptions: { groups: ['u'], enableImplicitConversion: true },
   skipMissingProperties: true,
   skipNullProperties: true,
   skipUndefinedProperties: true,