[GraphQL] Query Lists of Multiple Types using a Union in GraphQL

Posted 2022-08-08 answer1215

Unions are used when we want a GraphQL field or list to handle multiple types of data. With a Union Type, we can define a field that could resolve completely different types of data. In this lesson, we will write a query that obtains a list of different pet types

 

 

Unit type, we cannot use common field in query, I have to write in fragment:

# Write your query or mutation here
query 
  familyPets 
    __typename,
    ... on Cat 
      name
    ,
    ... on Dog 
      name