t.Fatalf("Failed to add column, got %v", err)
	}

	if !DB.Table("column_structs").Migrator().HasColumn(&NewColumnStruct{}, "NewName") {
		t.Fatalf("Failed to find added column")
	}

	if err := DB.Table("column_structs").Migrator().DropColumn(&NewColumnStruct{}, "NewName"); err != nil {
		t.Fatalf("Failed to add column, got %v", err)
	}

		Name: "treadmill 2",
	})

	if DB.Model(&hamster).Association("PreferredToy").Count() != 1 {
		t.Errorf("Hamster's toys should be added with Append")
	}

	if DB.Model(&hamster).Association("OtherToy").Count() != 1 {
		t.Errorf("Hamster's toys should be added with Append")
	}

	DB.Model(&hamster).Association("PreferredToy").Clear()

	if DB.Model(&hamster2).Association("PreferredToy").Count() != 0 {