鍵/值對應該是最後一個參數嗎？語法錯誤在用戶控制器Ruby on Rails的

Question

我已經在我的控制下

@user_party = UserParty.request(:start_date => params[:start_date], :start_time => params[:start_time]), current_user, @friend) 

但我得到的錯誤：語法錯誤，意外 ''，期待=> ... AMS [：START_TIME] CURRENT_USER，@friend）...^

我的全控制器

def create 
    if params[:user_party] && params[:user_].has_key?(:friend_id) 
     @friend = User.find(params[:user_party][:friend_id]) 
     @user_party = Userparty.request({:start_date => params[:start_date], :start_time => params[:start_time]}, current_user, @friend) 
      respond_to do |format| 
       if @user_party.new_record? 
        format.html do 
         flash[:error] = "There was a problem creating that friend request." 
         redirect_to user_path(@friend) 
        end 
        format.json {render json: @user_party.to_json} 

       else   
        format.html do 
         flash[:success] = "Userparty request sent" 
         redirect_to user_path(@friend) 
        end 
        format.json {render json: @user_party.to_json} 
       end 
      end 


    else 
     flash[:error] = "party required" 
     redirect_to root_path 
    end 
end 

和我user_party.rb是像這樣

def self.request(start_date, start_time, user1, user2) 
transaction do 

    party1 = UserParty.create!(start_date: start_date, start_time: start_time, user: user1, friend: user2, state: 'pending') 

    party2 = UserParty.create!(start_date: start_date, start_time: start_time, user: user2, friend: user1, state: 'requested') 


end 

結束

你會如何正確寫入？在此先感謝

Answer 1

你必須寫爲

@user_party = UserParty.request({:start_date => params[:start_date], :start_time => params[:start_time]}, current_user, @friend) 

可以傳遞鍵/值對作爲一個逗號分隔的列表

• ，而沒有其他類型的參數。

• 雖然還有其他類型的參數，但鍵/值對應該是最後一個參數。

所以：現在

def foo(options = {}) 
    p options 
end 

foo(1=>2, 2=>3) 
# => {1=>2, 2=>3} 

def bar(a,options = {}) 
    p options 
end 

bar(11, 1=>2, 2=>3) 
# => {1=>2, 2=>3} 

，而沒有上述情況持有 -

def bar(options = {},a) 
    p options 
end 
bar(1=>2,3=>4,12) 
# SyntaxError: (irb):12: syntax error, unexpected ')', expecting =>' 

在你原來的方法定義看，調用應該是：

Userparty.request(params[:start_date], params[:start_time]}, current_user, @friend)