Messages Controller中未定义的方法`stringify_keys' [英] Undefined method `stringify_keys' in Messages Controller

问题描述

我在尝试提交表单时遇到以下错误（表单显示1个用户想要发送其他用户时）

  MessageController中的NoMethodError＃创建
 
未定义的方法`stringify_keys'为：String 
 Rails.root：/ Users / fkhalid2008 / loand 
 
应用程序跟踪|框架跟踪|全跟踪
 app / controllers / messages_controller.rb：31：在`new'
 app / controllers / messages_controller.rb：31：在`create'
  

以下是Messages Controller的相关代码：

  def new 
 @message = Message.new 
 
 if params [：reply_to] 
 @reply_to = @ user.received_messages.find（params [：reply_to]）
除非@ reply_to.nil？ 
 @ message.to = @ reply_to.sender.login 
 @ message.subject =Re：#{@reply_to.subject}
 @ message.body =\\\
\ n * Original message * \\\
\\\
 #{@reply_to.body}
 end 
 end 
 end 
 
 def create 
 @message = Message.new（params [：message]）
 @ message.sender = @user 
 @ message.recipient = User.find_by_login（params [：message] [：to]）
 
 if @ message.save 
 flash [：notice] =发送消息
 redirect_to user_messages_path（@user）
 else 
 render：action => ：new 
 end 
 end 
  

我该如何解决这个问题？

更多支持代码如下：

消息>新视图（这是Form创建的地方）

 <％= form_for @message，：url => messages_path（：user_id => @user）do | f | ％GT; 
< br> 
< br /> 
< br /> 
< div class =field> 
< label>名称< / label> 
< input type =textname =nameid =contact_nameclass =required/> 
< / div> 
 
< div class =field> 
< label>电子邮件< / label> 
< input type =textname =emailid =contact_emailclass =required/> 
< / div> 
 
< div class =field> 
< label>主题< / label> 
< input type =textname =subjectid =contact_subjectclass =required/> 
< / div> 
 
< div class =field> 
< label>讯息< / label> 
< textarea name =messagerows =8cols =25id =contact_messageclass =required max_len，max_length = 1000 />< / textarea> 
< / div> 
< div class =btn> 
 <％= submit_tag'发送消息'％> 
< / div> 
 
<％end％> 
  

短信模式

  class Message< ActiveRecord :: Base 
 
 is_private_message 
 
 attr_accessor：to 
 
 end 
  

用户模型

  class User< ActiveRecord :: Base 
 $ b has_many：posts 
 has_one：profile 
 has_private_messages 
 $ b attr_accessible：电子邮件
 
 validates_presence_of：email 
 validates_uniqueness_of：email，：message =>嗯，这封电子邮件已经存在了
 validates_format_of：email，：with => /^([^\s]+)((?:[-a-z0-9]\.)[a-z]{2,})$/i，：message => 您好！请使用有效的电子邮件
 
 end 
  

POSTS> INDEX VIEW（这是Form链接的地方）

 < table class =table table -striped> 
< tbody> 
<％@ posts.each do | post | ％GT; 
< tr> 
< td>我是<％= post.title％>结婚<％= post.job％>在<％= post.location％>中，并寻找<％= post.salary％> ;.我的预算是<％= post.salary％>。< / td> 
< td> < button class =btndata-toggle =buttononClick =javascript：location.href ='/ messages / new'; />联系与LT; /按钮>< / TD> 
< td><％= time_ago_in_words（post.created_at）％>前< / TD> 
 <！ -   -  /。 
< td><％= link_to'显示'，发布％>< / td> 
< td><％= link_to'编辑'，edit_post_path（post）％>< / td> 
< td><％= link_to'Destroy'，post：：confirm => '你确定吗？'，：method => ：删除％>< / td> 
  - > 
< / tr> 
<％end％> 
< / tbody> 
< / table> 
  

开发日志

 在2012年4月22日星期一01:54:57 +0500开始POST/ messages127.0.0.1 
通过MessagesController处理＃以HTML格式创建
参数：{name=>faisal，commit=>Send Message，authenticity_token=" Qyww9hP6jLmqpQ + ua21FAk9vePju8Gpq39Gpaflf3wE =，utf8=" \342\234\\ ，邮件=>[e-mail]} 
用户负载（0.1ms）SELECT用户。* FROMusers限制1 
 
在17ms内完成500内部服务器错误
 
 NoMethodError（未定义方法`stringify_keys'为hello：String）：
 app / controllers / messages_controller.rb：31：在`new'
 app / controllers / messages_controller.rb：31：在`create'
  

解决方案

现在我明白了。

 <％= form_for @message，：url =>您已经以完全不一致的方式构建您的表单。 messages_path（：user_id => @user）do | f | ％GT; 
  

然后：

 < input type =textname =nameid =contact_nameclass =required/> 
  

是什么导致了这个文本字段与消息无关的情况。你是否在最后一个标记中看到 message 的提及？

解决方法很简单：使用助手。

而不是您的标记：

 < label>名称< / label> 
< input type =textname =nameid =contact_nameclass =required/> 
  

使用助手：

 <％= f.label：name％> 
<％= f.text_field：name％> 
  

您的字段将被正确命名（例如 message [name] ），你会在你的控制器中得到 params [：message] 。当然，您可以手动制作，但练习表明这不是最好的决定。

为其他字段重复此步骤。

I am getting the following error when I try to submit a form (the form shows up when 1 user wants to message another user)

NoMethodError in MessagesController#create

undefined method `stringify_keys' for "":String
Rails.root: /Users/fkhalid2008/loand

Application Trace | Framework Trace | Full Trace
app/controllers/messages_controller.rb:31:in `new'
app/controllers/messages_controller.rb:31:in `create'

Here is the relevant code from Messages Controller:

def new
  @message = Message.new

  if params[:reply_to]
    @reply_to = @user.received_messages.find(params[:reply_to])
    unless @reply_to.nil?
      @message.to = @reply_to.sender.login
      @message.subject = "Re: #{@reply_to.subject}"
      @message.body = "\n\n*Original message*\n\n #{@reply_to.body}"
    end
  end
end

def create
  @message = Message.new(params[:message])
  @message.sender = @user
  @message.recipient = User.find_by_login(params[:message][:to])

  if @message.save
    flash[:notice] = "Message sent"
    redirect_to user_messages_path(@user)
  else
    render :action => :new
  end
end

How do I fix this?

More supporting code is below:

MESSAGES>NEW VIEW (This is where Form is being created)

<%= form_for @message, :url => messages_path(:user_id => @user) do |f| %>
<br>
<br />
<br />
<div class="field">
<label>Name</label>
<input type="text" name="name" id="contact_name" class="required" />
</div>

<div class="field">
<label>Email</label>
<input type="text" name="email" id="contact_email" class="required" />
</div>

<div class="field">
<label>Subject</label>
<input type="text" name="subject" id="contact_subject" class="required" />
</div>

<div class="field">
<label>Message</label>
<textarea name="message" rows="8" cols="25" id="contact_message" class="required max_len", max_length=1000 /></textarea>
</div>
<div class="btn">
<%= submit_tag 'Send Message' %>
</div>

<% end %>

MESSAGE MODEL

class Message < ActiveRecord::Base

is_private_message

attr_accessor :to

end

USER MODEL

class User < ActiveRecord::Base

has_many :posts  
has_one :profile
has_private_messages

attr_accessible :email

validates_presence_of :email
validates_uniqueness_of :email, :message =>"Hmm, that email's already taken"
validates_format_of :email, :with => /^([^\s]+)((?:[-a-z0-9]\.)[a-z]{2,})$/i, :message => "Hi! Please use a valid email"

end

POSTS>INDEX VIEW (This is where Form is being linked to)

<table class="table table-striped">
<tbody>
<% @posts.each do |post| %>
<tr>
<td>I am a <%= post.title %> getting married in <%= post.job %> in <%= post.location %>, and looking for a <%= post.salary %>. My budget is <%= post.salary %>.</td>
<td> <button class="btn" data-toggle="button" onClick="javascript:location.href = '/messages/new';" />Contact</button></td>
<td><%= time_ago_in_words(post.created_at) %> ago.</td>
<!--/. 
<td><%= link_to 'Show', post %></td>
<td><%= link_to 'Edit', edit_post_path(post) %></td>
<td><%= link_to 'Destroy', post, :confirm => 'Are you sure?', :method => :delete %></td>
-->
</tr>
<% end %>
</tbody>
</table>

DEVELOPMENT LOG

Started POST "/messages" for 127.0.0.1 at Sun Apr 22 01:54:57 +0500 2012
Processing by MessagesController#create as HTML
Parameters: {"name"=>"faisal", "commit"=>"Send Message", "authenticity_token"=>"Qyww9hP6jLmqpQ+ua21FAk9vePju8Gpq39Gpaflf3wE=", "utf8"=>"\342\234\223", "subject"=>"testing", "message"=>"hello", "email"=>"[e-mail]"}
User Load (0.1ms)  SELECT "users".* FROM "users" LIMIT 1

Completed 500 Internal Server Error in 17ms

NoMethodError (undefined method `stringify_keys' for "hello":String):
app/controllers/messages_controller.rb:31:in `new'
app/controllers/messages_controller.rb:31:in `create'

解决方案

Now I see. You've built you form in a completely inconsistent way:

<%= form_for @message, :url => messages_path(:user_id => @user) do |f| %>

and then:

<input type="text" name="name" id="contact_name" class="required" />

what leads you to the situation where this text field has nothing to do with the message. Do you see any mention of message within the last tag?

Solution is simple: use helpers.

Instead of your markup:

<label>Name</label>
<input type="text" name="name" id="contact_name" class="required" />

use helpers:

<%= f.label :name %>
<%= f.text_field :name %>

And your fields will become properly named (like message[name]) and you'll get in your controller proper params[:message]. Of course, you can make it manually but practice shows that it isn't the best decision.

Repeat this step for every of your other fields.

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