Fix serverless save when name empty (#6720)

- fix serverless function error on save when name empty
- remove useless unique constraint on serverless function names

packages/twenty-server/src/engine/metadata-modules/serverless-function/dtos/update-serverless-function.input.ts

@@ -23,7 +23,6 @@ export class UpdateServerlessFunctionInput {
   description?: string;
 
   @IsString()
-  @IsNotEmpty()
   @Field()
   code: string;
 }

packages/twenty-server/src/engine/metadata-modules/serverless-function/serverless-function.entity.ts

@@ -17,7 +17,6 @@ export enum ServerlessFunctionRuntime {
 }
 
 @Entity('serverlessFunction')
-@Unique('IndexOnNameAndWorkspaceIdUnique', ['name', 'workspaceId'])
 export class ServerlessFunctionEntity {
   @PrimaryGeneratedColumn('uuid')
   id: string;

packages/twenty-server/src/engine/metadata-modules/serverless-function/serverless-function.service.ts

@@ -240,18 +240,6 @@ export class ServerlessFunctionService extends TypeOrmQueryService<ServerlessFun
     code: FileUpload | string,
     workspaceId: string,
   ) {
-    const existingServerlessFunction =
-      await this.serverlessFunctionRepository.findOne({
-        where: { name: serverlessFunctionInput.name, workspaceId },
-      });
-
-    if (existingServerlessFunction) {
-      throw new ServerlessFunctionException(
-        `Function already exists`,
-        ServerlessFunctionExceptionCode.SERVERLESS_FUNCTION_ALREADY_EXIST,
-      );
-    }
-
     let typescriptCode: string;
 
     if (typeof code === 'string') {