How to create more complex types in graphql using code first approach

Hello I’m trying to create field for mutation which is array of objects. Code looks like this:

import { Field, InputType } from '@nestjs/graphql';

type ChainToAddress = {
  chain: string;
  address: string;
};

@InputType()
export class CreateONSInput {
  @Field()
  ons: string;

  @Field(type => [ChainToAddress])
  chainAddressess: ChainToAddress;
}

Currently is throwing following error:

'ChainToAddress' only refers to a type, but is being used as a value here.

Any idea how to make it work, tried with interfaces / type but somehow not able to manage it

>Solution :

You need to create an InputType/ObjectType out of your nested interface to make it work.

@InputType()
class ChainToAddress {
  @Field()
  chain: string;
  @Field()
  address: string;
};

@InputType()
export class CreateONSInput {
  @Field()
  ons: string;

  @Field(type => [ChainToAddress])
  chainAddressess: ChainToAddress[];
}