Test mapping object types onto go primitives

codegen/testserver/gqlgen.yml

@@ -56,6 +56,8 @@ models:
     model: "github.com/99designs/gqlgen/codegen/testserver.MarshalPanic"
   Autobind:
     model: "github.com/99designs/gqlgen/codegen/testserver.Autobind"
+  Primitive:
+    model: "github.com/99designs/gqlgen/codegen/testserver.Primitive"
   MapStringInterfaceInput:
     model: "map[string]interface{}"
   MapStringInterfaceType:

codegen/testserver/models.go

@@ -84,3 +84,9 @@ const (
 	FallbackToStringEncodingB FallbackToStringEncoding = "B"
 	FallbackToStringEncodingC FallbackToStringEncoding = "C"
 )
+
+type Primitive int
+
+func (p Primitive) Squared() int {
+	return int(p) * int(p)
+}

codegen/testserver/primitive_objects.graphql

@@ -0,0 +1,8 @@
+extend type Query {
+    primitiveObject: [Primitive!]!
+}
+
+type Primitive {
+    value: Int!
+    squared: Int!
+}

codegen/testserver/primitive_objects_test.go

@@ -0,0 +1,40 @@
+package testserver
+
+import (
+	"context"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/99designs/gqlgen/client"
+	"github.com/99designs/gqlgen/handler"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPrimitiveObjects(t *testing.T) {
+	resolvers := &Stub{}
+	resolvers.QueryResolver.PrimitiveObject = func(ctx context.Context) (out []Primitive, e error) {
+		return []Primitive{2, 4}, nil
+	}
+
+	resolvers.PrimitiveResolver.Value = func(ctx context.Context, obj *Primitive) (i int, e error) {
+		return int(*obj), nil
+	}
+
+	srv := httptest.NewServer(handler.GraphQL(NewExecutableSchema(Config{Resolvers: resolvers})))
+	c := client.New(srv.URL)
+
+	t.Run("can fetch value", func(t *testing.T) {
+		var resp struct {
+			PrimitiveObject []struct {
+				Value   int
+				Squared int
+			}
+		}
+		c.MustPost(`query { primitiveObject { value, squared } }`, &resp)
+
+		assert.Equal(t, 2, resp.PrimitiveObject[0].Value)
+		assert.Equal(t, 4, resp.PrimitiveObject[0].Squared)
+		assert.Equal(t, 4, resp.PrimitiveObject[1].Value)
+		assert.Equal(t, 16, resp.PrimitiveObject[1].Squared)
+	})
+}