Fix for custom type registration

core/src/main/groovy/org/grails/gorm/graphql/entity/dsl/helpers/Typed.groovy

@@ -53,7 +53,7 @@ trait Typed<T> {
             graphQLType = typeManager.getEnumType(type, nullable)
         }
         else if (typeManager.hasType(type)) {
-            graphQLType = (GraphQLInputType)typeManager.getType(type, nullable)
+            graphQLType = typeManager.getType(type, nullable)
         }
         else {
             PersistentEntity entity = mappingContext?.getPersistentEntity(type.name)

examples/grails-test-app/grails-app/domain/grails/test/app/Artist.groovy

@@ -0,0 +1,17 @@
+package grails.test.app
+
+import grails.test.app.pogo.Painting
+import org.grails.gorm.graphql.entity.dsl.GraphQLMapping
+
+class Artist {
+
+    String name
+
+    static graphql = GraphQLMapping.build {
+        add('paintings', [Painting]) {
+            dataFetcher {
+                return [new Painting(name: 'test', artistName: 'Picasso', heightCm: 60, widthCm: 120)]
+            }
+        }
+    }
+}

examples/grails-test-app/src/integration-test/groovy/grails/test/app/ArtistIntegrationSpec.groovy

@@ -0,0 +1,50 @@
+package grails.test.app
+
+import grails.gorm.transactions.Rollback
+import grails.testing.mixin.integration.Integration
+import org.grails.gorm.graphql.plugin.testing.GraphQLSpec
+import org.hibernate.SessionFactory
+import spock.lang.Specification
+
+@Integration
+@Rollback
+class ArtistIntegrationSpec extends Specification implements GraphQLSpec {
+
+    SessionFactory sessionFactory
+
+    void "test listing artists and paintings"() {
+        given:
+        def a = new Artist(name: "Picasso").save(flush: true, failOnError: true)
+        sessionFactory.currentSession.flush()
+        sessionFactory.currentSession.transaction.commit()
+
+        when:
+        def resp = graphQL.graphql("""
+            {
+              artistList {
+                id
+                name
+                paintings {
+                  name
+                  heightCm
+                  widthCm
+                }
+              }
+            }
+        """)
+        def json = resp.body()
+        println json.toString()
+        def artists = json.data.artistList
+        def artist = artists[0]
+
+        then:
+        artists.size() == 1
+        artist.id == a.id
+        artist.name == "Picasso"
+        artist.paintings.size() == 1
+        artist.paintings[0].name == "test"
+        artist.paintings[0].heightCm == 60
+        artist.paintings[0].widthCm == 120
+    }
+
+}

examples/grails-test-app/src/main/groovy/grails/test/app/GraphQLCustomizer.groovy

@@ -1,5 +1,9 @@
 package grails.test.app
 
+import grails.test.app.pogo.Painting
+import grails.test.app.pogo.Profile
+import graphql.schema.GraphQLObjectType
+import graphql.schema.GraphQLOutputType
 import org.grails.gorm.graphql.binding.manager.GraphQLDataBinderManager
 import org.grails.gorm.graphql.fetcher.GraphQLDataFetcherType
 import org.grails.gorm.graphql.interceptor.impl.BaseGraphQLFetcherInterceptor
@@ -14,6 +18,9 @@ import org.grails.gorm.graphql.fetcher.impl.EntityDataFetcher
 import org.grails.gorm.graphql.fetcher.impl.SingleEntityDataFetcher
 import org.grails.gorm.graphql.fetcher.impl.SoftDeleteEntityDataFetcher
 import org.grails.gorm.graphql.fetcher.manager.GraphQLDataFetcherManager
+import org.grails.gorm.graphql.types.GraphQLTypeManager
+
+import static graphql.schema.GraphQLFieldDefinition.newFieldDefinition
 
 
 @CompileStatic
@@ -57,4 +64,27 @@ class GraphQLCustomizer extends GraphQLPostProcessor {
         binderManager.registerDataBinder(User, new UserDataBinder())
         binderManager.registerDataBinder(Role, new RoleDataBinder())
     }
+
+    @Override
+    void doWith(GraphQLTypeManager typeManager) {
+        GraphQLOutputType stringType = (GraphQLOutputType)typeManager.getType(String)
+        GraphQLOutputType intType = (GraphQLOutputType)typeManager.getType(Integer)
+        GraphQLObjectType.Builder builder = GraphQLObjectType.newObject()
+                .name('Painting')
+                .field(newFieldDefinition()
+                        .name('name')
+                        .type(stringType))
+                .field(newFieldDefinition()
+                        .name('artistName')
+                        .type(stringType))
+                .field(newFieldDefinition()
+                        .name('heightCm')
+                        .type(intType))
+                .field(newFieldDefinition()
+                        .name('widthCm')
+                        .type(intType))
+
+
+        typeManager.registerType(Painting, builder.build())
+    }
 }

examples/grails-test-app/src/main/groovy/grails/test/app/pogo/Painting.groovy

@@ -0,0 +1,10 @@
+package grails.test.app.pogo
+
+class Painting {
+
+    String name
+    String artistName
+    Integer heightCm
+    Integer widthCm
+
+}