AssertAssociationCount(t, users, "Account", 2, "after delete")

	// Clear
	DB.Model(&users).Association("Account").Clear()
	AssertAssociationCount(t, users, "Account", 0, "After Clear")
}

func TestPolymorphicHasOneAssociation(t *testing.T) {
	pet := Pet{Name: "hasone", Toy: Toy{Name: "toy-has-one"}}

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