如何从选项中删除空格？

Question

删除空白<%= f.select :challenge_id, options_for_select(@current_user_challenges.collect { |current| [current.full_challenge, current.id] }) %> 选项的最佳做法是什么？

形式

#My Attempts:
@current_user_challenges = current_user.challenges.order(:created_at).where("user_id > 0")
@current_user_challenges = current_user.challenges.order(:created_at).reject!(&:blank?)
@current_user_challenges = current_user.challenges.order(:created_at).reject { |id| id.blank? }
@current_user_challenges = current_user.challenges.order(:created_at).select!{|val| !val.empty?}

challenges_controller

let menuTap = UITapGestureRecognizer(target: self, action: #selector(showMenuPanel(_:)))
        menuTap.minimumPressDuration = 0.0
        menuTap.numberOfTapsRequired = 2
        menuTap.delaysTouchesBegan = true
        self.view.isUserInteractionEnabled = true
        self.view!.addGestureRecognizer(menuTap)


func showMenuPanel(_ recognizer: UITapGestureRecognizer) {

        print("TESTPANEL")

    }

Answer 1

您可以使用present?检查

选择值

@current_user_challenges = 
  current_user.includes(:challenges).challenges.order(:created_at).select{ |challenge| challenge.full_challenge.present? }

另外，我建议您在模型级别添加presence validation

class Challenge
  validates :full_challenge, presence: true
end