This is an example to show how to get graphql works with springboot

• graphql-spring-boot-starter
• graphql-java-tools

• GraphQL Java and SpringBoot
• GraphQL Java tools reference

Already have

• Query list
• Query with arguments
• Mutation
• Union type
• Field resolver
• Mutation with input type
• Fragment
• Nested query

To be added

• Defer

1. Download graphiql app

2. ./gradlew bootrun

3. Visit http://localhost:8081/graphql in GraphiQL

   Query all pets

   query {
        pets {
           ...on Bird {
             name
             type
             wings
             owner {
               name
             }
           }
         	...on Dog {
             name
             type
             license
             owner {
               name,
               address
             }
           }
       }
   }
   

   Query pet with specific id

   query {
     pet(id: 1) {
       ...on Bird {
             name
             type
             wings
             owner {
               name
             }
           }
       ...on Dog {
             name
             type
             license
             owner {
               name,
               address
             }
       }
     }
   }
   

   Update/create a dog

    mutation {
    	saveDog(id:-1, name: "XXX", age: 12, ownerId: 2, license: "dssd") {
            name
            type
       }
    }
   

   Create a pet with input type

   mutation {
     addPet(pet: {
       id: 99
       ownerId: 1
       name: "Mooo"
       type: DOG
       age: 10
       license: "555555"
     }) {
       ...on Dog {
         name
         type
       }
     }
   }
   

   Play with fragment

   query{
     pets {
       ...AllKindsOfPet
     }
   }
   
   fragment AllKindsOfPet on Pet {
     ...on Dog {
         type
       	name
       	owner {
           name
         }
     }
     ...on Bird {
       	type
         name
       	owner {
           name
         }
     }
   }
   

   Play with nested query

   query {
     pets {
       ...on Bird {
         name
         owner {
           identifier(type: PASSPORT)
         }
       }
     }
   }  
   

   Troubleshooting

   Q: Docs doesn't work in GraphiQL

   A: Click Edit HTTP Headers on right-top and add header Authorization