Question

I have a number of standard rails validations within my model:

validates_presence_of :url_string
validates_uniqueness_of :url_string
validates_presence_of :stream_source
validates_presence_of :width
validates_presence_of :height
validates_presence_of :name
validates_uniqueness_of :name
validates_presence_of :customer_name
validates_presence_of :iframe_background_color

If I don’t fill out one of these fields within my form then I am taken back to the form as expected but the odd thing is no error messages are displayed. I am using the code below to display the error messages:

<% @camera.errors.full_messages.each do |error| %>
  <p><%= error %></p>
<% end %

I also attempted to print out the @camera.errors object and this is what is shown:

#<ActiveModel::Errors:0x12db19bc @base=#<Camera id: 1, stream_source: "test", width: 640, height: 360, active: true, name: "test", url_string: "CAYD19Vp", customer_name: "test", iframe_background_color: "#FFFFFF", online: true, created_at: "2011-08-30 15:54:16", updated_at: "2011-09-06 15:52:48", audio: true, iframe_text_color: "#FF00FF", iframe_link_color: "#FF0000", notes: "Some notes!", offline_image_file_name: "Cake.jpg", offline_image_content_type: "image/jpeg", offline_image_file_size: 196591, offline_image_updated_at: "2011-09-06 12:12:38", pull_stream_url: "test", bitrate: "300-500", show_branding: false>, @messages={}>
#

As you can see the messages hash is empty. I tried setting the validation error message manually by doing the following:

validates_presence_of :name, :message => "No name present" 

but it did not populate the messages hash either.

Controller update action is shown below:

def update
  @camera = Camera.find(params[:id])
  if @camera.update_attributes(params[:camera])
    flash[:notice] = "Camera updated"
    redirect_to nwcadmin_camera_path
  else
    redirect_to :action => :edit
  end 
end 

I am using Ruby version ruby 1.9.2p290 and Rails version 3.1.0.

Any assistance would be great!

Thanks

Answer 1

I managed to get to the bottom of my problem. In the controller I was using:

redirect_to :action => :edit

I should have been using:

render :action => :edit

By using redirect_to I was hitting the edit action within the controller which was then getting a new camera object from the database rather than preserving the current camera object from the update action.