錯誤的參數數量（0代表3..6）

Question

我正在使用郵箱gem，我正在向用戶收件箱發送問題，以便他們可以查看和回答問題。我正在收到參數錯誤wrong number of arguments (0 for 3..6)。它指向行@message = current_user.send_message.new(:subject => "You have a question from #{@question.sender_id}",

我試圖使用發送消息實例，因爲代碼@message = current_user.messages.new(:subject => "You have a question from #{@question.sender_id}"的原始行將提交問題到通知表，但不連接到會話表。

問題控制器：

def create 
    @question = Question.new(params[:question]) 
    if @question.save 
    #Original code @message = Message.create 
    @message = current_user.send_message.new(:subject => "You have a question from #{@question.sender_id}", 
          #Original code :sender_id 
          :notification_id => @question.sender_id, 
          #Original code :recipient_id 
          :receiver_id => @question.recipient_id, 
          :body => @question.question) 

    @question.message = @message 
    @question.save 
    redirect_to questions_path, notice: 'Your question was saved successfully. Thanks!' 
    else 
    render :new, alert: 'Sorry. There was a problem saving your question.' 
    end 
end 

Answer 1

你所得到的錯誤，因爲send_message法（mailboxer寶石提供）要求3..6參數和你不發送任何參數給它。

另外，看着你的代碼，好像你正在試圖爲question保存message記錄。所以，你的@message應設置爲：

@message = current_user.message.new(:subject => "You have a question from #{@question.sender_id}", 
          #Original code :sender_id 
          :notification_id => @question.sender_id, 
          #Original code :recipient_id 
          :receiver_id => @question.recipient_id, 
          :body => @question.question) 
@question.message = @message 
@question.save 

注意我用current_user.message.new代替current_user.send_message.new。

EDIT

對於使用send_message，則至少需要傳遞3個參數：

send_message(recipient, "Body", "subject") 

其中recipient是接收消息的人。

我不知道你爲什麼在send_message（因爲它通常被稱爲create a new instance of a Class）之後鏈接new方法。

你可以叫send_message如下：

@message = current_user.send_message(@question.recipient_id, @question.question, "You have a question from #{@question.sender_id}")