Graphql - Query returns null - graphql

Question

I am using the graphql-java-annotations library for java to retrieve data from my spring backend.
<dependency>
<groupId>io.github.graphql-java</groupId>
<artifactId>graphql-java-annotations</artifactId>
<version>7.1</version>
</dependency>
When I call the query it always return null.
This is my Provider class:
GraphQLAnnotations graphqlAnnotations = new GraphQLAnnotations();
GraphQLSchema graphQLSchema = newSchema()
.query(graphqlAnnotations.object(QueryTest.class))
.build();
this.graphQL = GraphQL.newGraphQL(graphQLSchema).build();
This is the query:
#GraphQLName("queryTest")
public class QueryTest {
#GraphQLField
public static Test byId(final DataFetchingEnvironment env, #GraphQLName("id") Long id) {
return new Test();
}
}
And finally the Test.class
#GraphQLName("Test")
public class Test {
private String id;
private String name;
public Test() {
this("0");
}
public Test(String id) {
this.setName("Name" + id);
this.setId(id);
}
#GraphQLField
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
#GraphQLField
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
}
This is my call:
{
"query" : "query queryTest { byId(id: 2) { getId } }",
"operationName" : "queryTest"
}
And this is the result i get:
{
"data": {
"byId": null
}
}
I debugged into the graphql execution and found out that schema contains TestClass and Test. So type and query are known. With this configuration I don't have a fetcher or a resolver.

Answer 1

Found the solution:
I had to change my Provider class in order to create the schema correctly via the AnnotationsSchemaCreator Builder:
GraphQLSchema graphQLSchema = AnnotationsSchemaCreator.newAnnotationsSchema()
.query(QueryTest.class)
.typeFunction(new ZonedDateTimeFunction())
.build();
this.graphQL = GraphQL.newGraphQL(graphQLSchema).build();