Decapi

Union types

Considering such query:

xxxxxxxxxx
 
{
  search(keyword: "car") {
    ... on Product {
      name
      price
    }
    ... on Category {
      name
      itemsCount
      avgProductPrice
    }
  }
}

Search field return union of Product and Category. To define such union we need to use @Union decorator

xxxxxxxxxx
 
import { ObjectType, Field, Union } from 'decapi'
​
@ObjectType()
class Product {
  @Field()
  name: string
  @Field()
  price: number
}
​
@ObjectType()
class Category {
  @Field()
  name: string
  @Field()
  itemsCount: number
  @Field()
  avgProductPrice: number
}
​
@Union({ types: [Product, Category] })
class SearchResult {}