Couldn't find <Model> without an ID problem

Ruby
1

Hi all,

I’m new to ruby on rails. i’ve been following the Simply Rails 2 Book and got me going to creating my own application. I am having trouble trying to get a simple edit/update going. Everytime I hit submit, I get the following error:



Couldn't find Content without an ID

Request
Parameters:
{"format"=>"#<content:0x4d3daac>",
 "commit"=>"Update",
 "_method"=>"put",
 "authenticity_token"=>"axBSuIWVTMRB2CKcmMO59tqtOlMtXRSXQQ7xeHEMd78=",
 "content"=>{"title"=>"About Us",
 "verbiage"=>"The company was formed in 2008 by seven healthcare professionals involved in the areas of acute care hospital,
 rehab hospital,
 skilled nursing and rehab,
 out-patient clinics,
 and Home Health Care. Update"}}

I have a form: edit.html.erb


<h2>Edit content</h2>
<% form_for @content do |f| %>
<p>
  <%= f.label :title %><br/>
  <%= f.text_field :title %>
</p>
<p>
  <%= f.label :verbiage %><br/>
  <%= f.text_area :verbiage %><br/>
</p>

<%= f.submit "Update"%>
<% end %>

Here is my controller:


class ContentsController < ApplicationController
  layout 'subpages'
  
  def new
    @content = Content.new
  end
  

  def create
    @content = Content.new(params[:content])
    @content.save
  end

  def edit
    @content = Content.find(params[:id])
  end
  
  def update
      @content = Content.find(params[:id])
      @content.update_attributes(params[:content])
      redirect_to :action => "edit", :id => @content.id

  end

end

i’ve been trying to figure this out for 3 days but no luck. The solutions on the web and books seem to explain that I need to have id passed to the controller, but I thought form_for @content should already take care of that. I would appreciate all the help i can get. Thanks.

2

Nevermind…figured it out.

3

It is good etiquette to post your solution even if you found it yourself. That way if others have the same problem and find you post, they can see how you fixed it.

4

Here’s the solution:

I found out that I’m missing an “s” on my routes.rb. Instead of ‘map.resources’, I had ‘map.resource’