t.Errorf("No error should returns, but got %v", err)
	}

	AssertEqual(t, p, p2)

	if err := DB.First(&p, "id = ?", p2.ID).Error; err != nil {
		t.Errorf("No error should happen when querying with customized type for primary key, got err %v", err)
	}

	AssertEqual(t, p, p2)
}

func TestStringPrimaryKeyForNumericValueStartingWithZero(t *testing.T) {
	type AddressByZipCode struct {