Ref阵列的TypeGraphQL和Typegoose

Question

我很难找到资源，这说明了如何使用TypeGraphQL和Typegoose来处理对对象的一系列引用。

鉴于以下模式：

@ObjectType({description: "Blog Tag Model"})
export class BlogTag {

  @Field(() => ID)
  id: number;

  @Field(_type => String)
  @Property({required: true, unique: true, index: true, trim: true })
  name: string;
}

@ObjectType({ description: "Blog post model" })
export class BlogPost {

  @Field(() => ID)
  id: number;

  @Field()
  @Property({required: true})
  title: string;

  @Field()
  @Property({required: true})
  description: string;

  @Field(_type => [BlogTag], {nullable: false})
  @Property({default: [], ref: 'BlogTag'})
  tags: Ref<BlogTag>[];
}


@InputType({ description: "Blog post input" })
export class BlogPostInput implements Partial<BlogPost>{

  @Field()
  @Property()
  title: string;

  @Field()
  @Property()
  description: string;

  // Here is the problem / question
  @Field(_type => [BlogTag], {nullable: false})
  @Property({ref: BlogTag})
  tags: Ref<BlogTag>[];   
}

这是为此代码获得的错误：

CannotDetermineGraphQLTypeError: Cannot determine GraphQL input type for 'tags' of 'BlogPostInput' class. Is the value, that is used as its TS type or explicit type, decorated with
a proper decorator or is it a proper input value?

我想要实现的是给BlogPost模型提供存储BlogTag模型的引用/ObejctID数组的可能性。

我是这个框架的新手，我不知道这是否是一个很好的实践。如何创建接受ID数组的InputType？

Answer 1

您需要使用BlogTagInput创建一个单独的@InputType，或者检查FAQ以找到一些方便的、但“做好准备”的解决方法：

https://typegraphql.com/docs/faq.html#situations-frequently-arise-where-inputtype-and-objecttype-have-exactly-the-same-shape-how-can-i-share-the-definitions