How to define field with argument in ObjectType?

[waptik]

Hi! I'm new to typegraphql. I'm trying to migrate from SDL to typegraphql.
I have some complex type and need some help wit it:

I have some enum defined as follow

// enums.ts
...
export enum ImageFormat {
JPG='JPG',
GIF='GIF',
WEBP='WEBP'
}

export enum Role{
USER='USER',
ADMIN='ADMIN',
ROOT='ROOT'
}

registerEnumType(ImageFormat , { name: 'ImageFormat ' });
registerEnumType(Role, { name: 'Role' });

...

// end enums.ts

How do i achieve the following?

type User{
      id: String!
      name: String!
      roles: [Role]!
      isAdmin: Boolean!
      since: DateTime!
      type: String!
      description: String
      username: String
      "User's image"
      image(
        height: Int,
        format: ImageFormat
      ): String
    }

I am not able to properly define field argument like image(height: Int, format:ImageFormat): String

[MichalLytek]

Have you read the docs?
https://typegraphql.com/docs/resolvers.html#field-resolvers

[waptik]

I sure did. But it seem i misunderstood some stuffs over there.
What i did was a follow:

// User.ts
@ObjectType()
export class User {
...
@Field()
image(@Arg("height") height: number, @Arg("format") format: ImageFormat): string // was wrong
}

I did the above so that i could create a type resolver based on it, but i got the following error Unable to resolve signature of property decorator when called as an expression.ts(1240)

But i failed to notice this line:

Note that if a field name of a field resolver doesn't exist in the resolver object type, it will create a field in the schema with this name. This feature is useful when the field is purely calculable (eg. averageRating from ratings array) and to avoid polluting the class signature.

So meaning i just have to omit image() from User and move it to UserResolver as a FieldResolver. Correct me i am wrong.