Question

在Rails 4.0应用程序中，我有一个表单及其相应的创建操作。它们都很完美：

查看表单

<%= form_for @user_friendship, method: :post do |f| %>

    <div class="form form-actions">     

        <%= f.text_field :friend_id, value: @friend.id %>
        <%#= f.button :submit #=> This creates a User_friendship %>
        <%= f.button :submit %>
        <%= link_to "Cancel", profile_path(@friend.profile_name), class: 'btn' %>

    </div>

<% end %>

创建行动

def create
    if params[:friend_id]

        @friend = User.find_by_id(params[:user_friendship][:friend_id])

        logger.fatal "Here is the friend:"
        logger.fatal @friend.inspect

    else

    end

    if @friend

        @user_friendship = UserFriendship.request(current_user,@friend)

        logger.fatal @user_friendship.inspect

#       if @user_friendship.new_record?
#           flash[:error] = "There was a problem creating that friend request"
#       else
#           flash[:success] = "Friend request sent to " + @friend.first_name
#       end

        redirect_to profile_path(@friend.profile_name), status: 302


    else
        flash[:error] = "Friend required!"
        redirect_to root_path, status: 302
    end 
end

但是当我取消注释这些内容时：

    if @user_friendship.new_record?
            flash[:error] = "There was a problem creating that friend request"
    else
            flash[:success] = "Friend request sent to " + @friend.first_name
    end

我收到此错误消息：

NoMethodError in UserFriendshipsController#create
undefined method `new_record?' for #<Mail::Message:0x00000104aae768>

我不知道这个错误来自哪里（这是邮件的问题吗？）所以请告诉我是否需要发布更多信息。

我发现Mail::Message部分真的很奇怪......这个对象是什么？

模型

def self.request(user1, user2)
    friendship1 = []

    transaction do
        friendship1 = create!(user_id: user1.id, friend_id: user2.id, state: 'pending')
        friendship2 = create!(user_id: user2.id, friend_id: user1.id, state: 'requested') 
    end

    friendship1.send_request_email
end

def send_request_email
    UserNotifier.friend_requested(id).deliver
end

邮件收发器：

def friend_requested(user_friendship_id)


    user_friendship = UserFriendship.find(user_friendship_id)

    @user = user_friendship.user
    @friend = user_friendship.friend


    mail to: @friend.email,
         subject: @user.first_name + " wants to be your friend!"
end

Answer 1

好吧，您在UserFriendship.request调用中获取了一个Mail :: Message对象。这个对象有一个方法“new_record？” ？。可能不是。

Answer 2

@user_friendship被分配了从调用UserFriendship.request(...)返回的值。看来该方法返回一个邮件对象（您是在那里发送电子邮件通知作为方法的最后一行吗？）。尝试从该方法返回UserFriendship对象。

编辑：

更好的是，只需执行@user_friendship = UserFriendship.create(current_user, @friend)然后在after_create回调中发送电子邮件。

我的创建操作无法访问.new_record？方法

2 个答案: