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Marcos Lisboa
8,117 PointsNoMethodError in Devise::Session#new
I am creating a application for sending SMS online. I want to the sent messages list and the create new message form to be in one page. So i made some changes in app/controllers/messages_controller.rb:
# GET /messages.json
def index
@messages = current_user.messages.all
+ @message = current_user.messages.new
end
# GET /messages/1
@@ -38,14 +39,10 @@ def create
sms_text = sms_text + "\n" +"...Enviado de AngoRussia.com"
response = nexmo.send_message({:to => @message.phone_no, :from => 'AngoRussia', :text => sms_text})
if response.ok?
- format.html { redirect_to @message, notice: 'A sua mensagem foi enviada.' }
+ format.html { redirect_to messages_path, notice: 'A sua mensagem foi enviada.' }
else
- format.html { redirect_to @message, alert: 'Houve um erro. Por favor tente novamente.' }
+ format.html { redirect_to messages_path, alert: 'Houve um erro. Por favor tente novamente.' }
end
- format.json { render action: 'show', status: :created, location: @message }
- else
- format.html { render action: 'new' }
- format.json { render json: @message.errors, status: :unprocessable_entity }
end
else
format.html { redirect_to messages_path, alert: 'So pode mandar 2 mensagens a cada 24 horas.' }
Then in layout for app/views/layouts/application.html.erb
</fieldset>
</div>
</div>
+ <div class="span3">
+ <div class="well sidebar-nav pull-right">
+ <div id="message_composer">
+ <legend>Compor Mensagem</legend>
+ <%= simple_form_for(@message) do |f| %>
+ <%= f.error_notification %>
+ <div class="form-inputs">
+ <%= f.input :sender_name, :label => "Seu Nome" %>
+ <%= f.input :recepient, :label => "Nome do Recipiente" %>
+ <%= f.input :phone_no, :label => "Numero Telefonico do Recipiente" %>
+ <%= f.input :body, :label => "Texto" %>
+ </div>
+ <div class="form-actions">
+ <%= f.button :submit, :value => "Enviar", :class => "btn btn-small btn-success" %>
+ <%= link_to 'Voltar', messages_path, :class => "btn btn-small btn-warning" %>
+ </div>
+ <% end %>
+ </div>
+ </div><!--/.well -->
+ </div><!--/span-->
</div><!--/row-->
<br />
<br />
Now i am getting a Devise error:
The error apeared only after i logged out. Now i can't login anymore. Please help me fix this :(
4 Answers
Nick Fuller
9,027 PointsHi Marcos
In your controller within the index action you're trying to use a devise method called "current_user". Since you logged out, there is no current_user!
One solution is to wrap your UI within some logic
<% if user_signed_in? %>
<div class="span3">
<div class="well sidebar-nav pull-right">
<div id="message_composer">
<legend>Compor Mensagem</legend>
<%= simple_form_for(@message) do |f| %>
<%= f.error_notification %>
<div class="form-inputs">
<%= f.input :sender_name, :label => "Seu Nome" %>
<%= f.input :recepient, :label => "Nome do Recipiente" %>
<%= f.input :phone_no, :label => "Numero Telefonico do Recipiente" %>
<%= f.input :body, :label => "Texto" %>
</div>
<div class="form-actions">
<%= f.button :submit, :value => "Enviar", :class => "btn btn-small btn-success" %>
<%= link_to 'Voltar', messages_path, :class => "btn btn-small btn-warning" %>
</div>
<% end %>
</div>
</div><!--/.well -->
</div><!--/span-->
<% else %>
<p>Please login to send a message!</p>
<% end %>
Marcos Lisboa
8,117 PointsOk, but i had put in controller User == Null and made so that "if user_dont_exist" => "create_a_new_user". Isn't this a fix for that error?
Nick Fuller
9,027 PointsSo, I believe I understand what you're trying to do but it has a couple issues with it.
First, you need to refresh yourself on how classes work. Trying to check User == nil (remember null is not a concept in ruby, we use nil instead) will ALWAYS return false. When a user is logged in, they are operating as an instance of the User class, so even if someone is logged in User == nil, will still be false.
Now if I understand correctly, you're also trying to redirect the user to a different page if they aren't logged in?
Devise has a method for your controller to accomplish this goal. At the top of your controller you can wrap the method in a callback like so..
class MessagesController < ApplicationController
before_action :authenticate_user!, only: [:index, :create]
# ...
# rest of the controller code omitted
end
- just a side note, as of rails 4 they are changing the names of callbacks from "filter" to "action". So the below code above works in rails 4+. If this project you're working on is rails 3, then you need to use
before_filter :authenticate_user!, only: [:index, :create]
Now, if someone tries to reach the :index or :create action of the MessagesController and they are not signed in, they will be redirected to the user_root_path (if you've created this route) or the root_path.
I highly recommend you read some of the devise documentation on their github page. It's got a lot good information!
Marcos Lisboa
8,117 PointsThanks!