Improve compatibility when set model

gorm_test.go

@@ -404,20 +404,20 @@ func TestOrderAndPluck(t *testing.T) {
 	}
 
 	var ages1, ages2 []int64
-	db.Model(&[]User{}).Order("age desc").Pluck("age", &ages1).Order("age").Pluck("age", &ages2)
+	db.Model([]User{}).Order("age desc").Pluck("age", &ages1).Order("age").Pluck("age", &ages2)
 	if !reflect.DeepEqual(ages1, ages2) {
 		t.Errorf("The first order is the primary order")
 	}
 
 	var ages3, ages4 []int64
-	db.Model(&[]User{}).Order("age desc").Pluck("age", &ages3).Order("age", true).Pluck("age", &ages4)
+	db.Model(&User{}).Order("age desc").Pluck("age", &ages3).Order("age", true).Pluck("age", &ages4)
 	if reflect.DeepEqual(ages3, ages4) {
 		t.Errorf("Reorder should works well")
 	}
 
 	ages = []int64{}
 	var names []string
-	db.Model(&User{}).Order("name").Order("age desc").Pluck("age", &ages).Pluck("name", &names)
+	db.Model(User{}).Order("name").Order("age desc").Pluck("age", &ages).Pluck("name", &names)
 	if !(names[0] == "1" && names[2] == "3" && names[3] == "3" && ages[2] == 24 && ages[3] == 22) {
 		t.Errorf("Should be ordered correctly with multiple orders")
 	}

model.go

@@ -34,8 +34,7 @@ func (m *Model) primaryKeyValue() int64 {
 	if m.data == nil {
 		return -1
 	}
-
-	data := reflect.ValueOf(m.data).Elem()
+	data := reflect.Indirect(reflect.ValueOf(m.data))
 
 	switch data.Kind() {
 	case reflect.Array, reflect.Chan, reflect.Map, reflect.Ptr, reflect.Slice: