使用带远程的ajax的Ruby表单:true给出了ActionController :: InvalidAuthenticityToken错误.经典提交没有

我正在为一个RoR网站写一个聊天页面.我把它全部用HTML编写,我试图用ajax实现它.有一个提交消息的表单.表单标签读取<%= form_for(@chat, remote: true, :authenticity_token => true) do |f| %>

我的整个观点:

  

    
        
    
    
        

        

            
[ . . . Communications . . . ]
        


        


            <% $chat_users.each do |user| %>
            <% user = User.find_by_username(user) %>
            <%= button_to user.username, flop_chat_path(user), :class => "select", :method => :get  %>
            <% end %>
        
        

            <% $messeges.each do |i| %>
                <% if i[1] == "from" %>
                
<%= i[0] %>
                

                <% else %>
                
<%= i[0] %>
                

                <%end%>
            <%end%>
        
        

            <%= form_for(@chat, remote: true, :authenticity_token => true) do |f| %>
            <%= f.text_field :content, id: "compose" %>
            

            

            <%= f.submit "Send Messege", id: "submit" %>
        <% end %>
        
    

控制器:

class ChatsController < ApplicationController
     $messeges = Array.new(10, " ")
def new
    $messeges = Array.new
    if $ruser != nil
    $messeges = Array.new
    Chat.all.each_with_index do |i, index|
        if i.recipient == current_user.id && i.sender == $ruser.id
            $messeges.push([i.content, "to"])
        end
        if i.recipient == $ruser.id && i.sender == current_user.id
            $messeges.push([i.content, "from"])
        end
    end
    end
    $chat_users = Array.new
    User.all.each do |user|
        if user != nil && current_user != nil
        if user.game_id == current_user.game_id && user.id != current_user.id
            $chat_users.push(user.username)
        end
        end
    end
    @chat = Chat.new
end

def create
    if $ruser != nil
    @chat = Chat.new(chat_params)
    @chat.recipient = $ruser.id
    @chat.sender = current_user.id
    @chat.save
    end
    redirect_to "/comms/new"
end

def flop
    $ruser = User.find(params[:id])
    $messeges = Array.new
    Chat.all.each_with_index do |i, index|
        if i.recipient == current_user.id && i.sender == $ruser.id
            $messeges.push([i.content, "to"])
        end
        if i.recipient == $ruser.id && i.sender == current_user.id
            $messeges.push([i.content, "from"])
        end
    end
    redirect_to "/comms/new"
end

private
    def chat_params
        params.require(:chat).permit(:content)
    end
end

另外,我<%= csrf_meta_tags %>在我的application.html.erb中

我在网上发现了一些关于人们在从ajax切换到html时遇到与rails 4相同错误的其他事情,但这似乎只是因为他们没有:authenticity_token => true包含参数.任何帮助是极大的赞赏.