}

	var contents []ItemContent
	if err := tx.Find(&contents).Error; err != nil {
		t.Errorf("failed to find contents, got error: %v", err)
	}
	if len(contents) != 3 {
		t.Errorf("expected %d contents, got %d", 3, len(contents))
	}

	// test delete
	if err := tx.Model(&item).Association("Contents").Unscoped().Delete(&contents[0]); err != nil {
		t.Errorf("failed to delete Contents, got error: %v", err)
	}

	owner := TokenOwner{
		Name:  "user",
		Token: Token{Content: "token"},
	}
	o1, err := saveTokenOwner(&owner)
	if err != nil {
		t.Errorf("failed to save token owner, got error: %v", err)
	}
	if o1.Name != "user_name" {
		t.Errorf(`owner name should be "user_name", but got: "%s"`, o1.Name)
	}
	if o1.Token.Content != "token_encrypted" {
		t.Errorf(`token content should be "token_encrypted", but got: "%s"`, o1.Token.Content)

	Value  string
	Blogs  []*Blog `gorm:"many2many:blog_tags"`
}

func compareTags(tags []Tag, contents []string) bool {
	var tagContents []string
	for _, tag := range tags {
		tagContents = append(tagContents, tag.Value)
	}
	sort.Strings(tagContents)
	sort.Strings(contents)
	return reflect.DeepEqual(tagContents, contents)
}

func TestManyToManyWithMultiPrimaryKeys(t *testing.T) {