Decorator factory should apply to nested objects

[abouroubi]

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

According to #688 and to the docs, a second argument can be sent to PartialType() to change the decorator applied to the parent class, for example changing from ObjectType() to InputType(), but if the parent class is composed of another ObjectType() this change doesn't apply to it, and the schema builder will fail.

@ObjectType()
class ClassA {
  @Field()
  email: string;

  @Field()
  b: ClassB;
}

@ObjectType()
class ClassB {
  @Field()
  firstName: string;

  @Field()
  lastName: string;
}


@InputType()
export class ClassAInput extends PartialType(ClassA, InputType) {}

This code sample will fail on app startup, with the error:

/Users/project_nestjs/node_modules/@nestjs/graphql/dist/schema-builder/factories/input-type.factory.js:19
                throw new cannot_determine_input_type_error_1.CannotDetermineInputTypeError(hostType, typeRef);
                      ^
Error: Cannot determine a GraphQL input type ("ClassB") for the "b". Make sure your class is decorated with an appropriate decorator.
    at InputTypeFactory.create (/Users/project_nestjs/node_modules/@nestjs/graphql/dist/schema-builder/factories/input-type.factory.js:19:23)
    at /Users/project_nestjs/node_modules/@nestjs/graphql/dist/schema-builder/factories/input-type-definition.factory.js:48:52
    at Array.forEach (<anonymous>)
    at /Users/project_nestjs/node_modules/@nestjs/graphql/dist/schema-builder/factories/input-type-definition.factory.js:46:33
    at resolveObjMapThunk (/Users/project_nestjs/node_modules/graphql/type/definition.js:504:40)
    at defineInputFieldMap (/Users/project_nestjs/node_modules/graphql/type/definition.js:1313:20)
    at GraphQLInputObjectType.getFields (/Users/project_nestjs/node_modules/graphql/type/definition.js:1276:27)
    at TypeFieldsAccessor.extractFromInputType (/Users/project_nestjs/node_modules/@nestjs/graphql/dist/schema-builder/services/type-fields.accessor.js:9:35)
    at /Users/project_nestjs/node_modules/@nestjs/graphql/dist/schema-builder/factories/input-type-definition.factory.js:64:66
    at resolveObjMapThunk (/Users/project_nestjs/node_modules/graphql/type/definition.js:504:40)

Minimum reproduction code

https://codesandbox.io/s/optimistic-flower-n5qhe9

Steps to reproduce

No response

Expected behavior

The entity to compile without error.

Package version

11.0.5

Graphql version

"graphql": "^16.3.0",

NestJS version

No response

Node.js version

No response

In which operating systems have you tested?

• macOS
• Windows
• Linux

Other

No response

[kamilmysliwiec]

Please provide a minimum reproduction repository (Git repository/StackBlitz/CodeSandbox project).

[abouroubi]

Yes of course, here is the link: https://codesandbox.io/s/optimistic-flower-n5qhe9

[mehdimoozeh]

@abouroubi Any news on this one?

[abouroubi]

No idea, I just stopped using the PartialType