ruby-on-rails - User Helper Method - 抓取 ID 与当前用户 ID 不匹配的用户

Question

尝试编写具有 3 个基本条件的辅助方法。添加第三个尝试将当前用户排除在结果之外的结果会导致错误。

  def male_soccer_players
    return User.where(:gender => "male", :soccer => true, :id != current_user.id)
  end

错误是

app/controllers/application_controller.rb:12: syntax error, unexpected ')', expecting => 

Answer 1

为什么不创建一个范围？

scope :except, ->(user) { where.not(id: user) }

在你的情况下：

def male_soccer_players
  User.except(current_user).where(:gender => "male", :soccer => true)
end

或者，如果您愿意，如果您对可重用性感兴趣，您可以更进一步并创建其他范围：

scope :male, -> { where(gender: "male") }
scope :soccer_player, -> { where(soccer: true) }

def male_soccer_players
  User.male.soccer_player.except(current_user)
end

Answer 2

此 :id != current_user.id Rails中的问题.where仅通过哈希尝试

def male_soccer_players
  User.where(:gender => "male", :soccer => true).where('id != ?', current_user.id)
end

或者

def male_soccer_players
  User.where('gender = ? and soccer = ? and id != ?', "male", true, current_user.id)
end

Answer 3

尝试这个：

 def male_soccer_players
        return User.where(:gender => "male", :soccer => true).where("id not != ", current_user.id)
    end