if err := DB.Create(&user).Error; err != nil {
		t.Fatalf("errors happened when create: %v", err)
	}

	var user2 User
	DB.Preload("Pets.Toy").Find(&user2, "id = ?", user.ID)
	CheckUser(t, user2, user)

	DB.Delete(&pet)

	var user3 User
	DB.Preload(clause.Associations+"."+clause.Associations).Find(&user3, "id = ?", user.ID)
	if len(user3.Pets) != 0 {
		t.Fatalf("User.Pet[0] was deleted and should not exist.")
	}

		t.Fatalf("Failed to query smaller user, got error %v", err)
	}

	AssertObjEqual(t, user, simpleUser, "Name", "ID", "UpdatedAt", "CreatedAt")

	var simpleUser2 SimpleUser
	if err := DB.Model(&User{}).Select("id").First(&simpleUser2, user.ID).Error; err != nil {
		t.Fatalf("Failed to query smaller user, got error %v", err)
	}