Fix support embedded pointer type struct, close #1450

embedded_struct_test.go

@@ -71,3 +71,21 @@ func TestSaveAndQueryEmbeddedStruct(t *testing.T) {
 		}
 	}
 }
+
+func TestEmbeddedPointerTypeStruct(t *testing.T) {
+	type HNPost struct {
+		*BasePost
+		Upvotes int32
+	}
+
+	DB.Create(&HNPost{BasePost: &BasePost{Title: "embedded_pointer_type"}})
+
+	var hnPost HNPost
+	if err := DB.First(&hnPost, "title = ?", "embedded_pointer_type").Error; err != nil {
+		t.Errorf("No error should happen when find embedded pointer type, but got %v", err)
+	}
+
+	if hnPost.Title != "embedded_pointer_type" {
+		t.Errorf("Should find correct value for embedded pointer type")
+	}
+}

scope.go

@@ -115,6 +115,9 @@ func (scope *Scope) Fields() []*Field {
 			if isStruct {
 				fieldValue := indirectScopeValue
 				for _, name := range structField.Names {
+					if fieldValue.Kind() == reflect.Ptr && fieldValue.IsNil() {
+						fieldValue.Set(reflect.New(fieldValue.Type().Elem()))
+					}
 					fieldValue = reflect.Indirect(fieldValue).FieldByName(name)
 				}
 				fields = append(fields, &Field{StructField: structField, Field: fieldValue, IsBlank: isBlank(fieldValue)})