t.Fatalf("errors happened when create: %v", err)
	}

	// Count
	AssertAssociationCount(t, users, "Team", 6, "")

	// Find
	var teams []User
	if DB.Model(&users).Association("Team").Find(&teams); len(teams) != 6 {
		t.Errorf("teams count should be %v, but got %v", 6, len(teams))
	}

	// Append
	DB.Model(&users).Association("Team").Append(
		&User{Name: "pet-slice-append-1"},