NestJS getting relationship info to graphql

Question

I'm trying to access a property from the many-to-many relationship model. But NestJS's GraphQL implementation won't let me. I've tried already IntersectionType, creating a custom type, ...

But everything gives me:

throw new TypeError();
                      ^
TypeError:
    at Reflect.getMetadata...

Example:

export class Model1{
  @Field(() => ID)
  @PrimaryKey
  @Column
  id: string;

  @BelongsToMany(() => Model2, () => Relation )
  others: (Game & { Relation : Relation })[];
}

export class Model2{
  @Field(() => ID)
  @PrimaryKey
  @Column
  id: string;

  @BelongsToMany(() => Model1, () => Relation )
  others: (Game & { Relation : Relation })[];
}

export class Relation {
  @ForeignKey(() => Model1)
  @Field({ nullable: true })
  @Column
  model1Id: string;

  @ForeignKey(() => Model2)
  @Field({ nullable: true })
  @Column
  model2Id: string;

  @Column
  some_property: string
}

How would you setup your graphql properties so I can access the some_property from the relation object? I can access it in code. But I can't seem to setup the graphql attributes so I can query them.