fix issue where time.Time is considered a GORM model

Author: dmacthedestroyer

gorm/utilities.go

@@ -12,6 +12,8 @@ import (
 	jgorm "github.com/jinzhu/gorm"
 	"github.com/jinzhu/inflection"
 
+	"time"
+
 	"github.com/infobloxopen/atlas-app-toolkit/rpc/resource"
 )
 
@@ -122,7 +124,7 @@ func indirectType(t reflect.Type) reflect.Type {
 func isModel(t reflect.Type) bool {
 	kind := t.Kind()
 	_, isValuer := reflect.Zero(t).Interface().(driver.Valuer)
-	if (kind == reflect.Struct || kind == reflect.Slice) && !isValuer {
+	if (kind == reflect.Struct || kind == reflect.Slice) && !isValuer && t != reflect.TypeOf(time.Time{}) {
 		return true
 	}
 	return false

gorm/utilities_test.go

@@ -2,8 +2,11 @@ package gorm
 
 import (
 	"context"
+	"reflect"
 	"testing"
 
+	"time"
+
 	"github.com/stretchr/testify/assert"
 )
 
@@ -46,3 +49,19 @@ func TestHandleFieldPath(t *testing.T) {
 		}
 	}
 }
+
+func TestIsModel(t *testing.T) {
+	for tName, tCase := range map[string]struct {
+		input reflect.Type
+		want  bool
+	}{
+		"time.Time":  {reflect.TypeOf(time.Time{}), false},
+		"*time.Time": {reflect.TypeOf(&time.Time{}), false},
+	} {
+		t.Run(tName, func(t *testing.T) {
+			if got, want := isModel(tCase.input), tCase.want; got != want {
+				t.Errorf("got %v; want %v", got, want)
+			}
+		})
+	}
+}