error

ActionController::RoutingError at /projects/com.test.tester/edit
No route matches {:controller=>"projects", :action=>"show", :format=>nil, :project_name=>#<Project id: 1, min_android_phone_app_version: 1, min_android_tablet_app_version: 1, min_android_iphone_app_version: 1, min_android_ipad_app_version: 1, min_app_version: 1, created_at: "2013-04-18 22:13:28", updated_at: "2013-04-18 22:13:28", project_name: "com.test.tester", creative_url: "">}


#<Class:0x007fbafdb101b0>#_app_views_projects__form_html_erb__3657852997696426320_70220593400580
app/views/projects/_form.html.erb, line 1
  1 <%= form_for(@project) do |f| %>
    2   <% if @project.errors.any? %>
    3     <div id="error_explanation">
    4       <h2><%= pluralize(@project.errors.count, "error") %> prohibited this project from being saved:</h2>
    5 
    6       <ul>

#<Class:0x007fbafdb101b0>#_app_views_projects_edit_html_erb___32833286902762729_70220595490880
app/views/projects/edit.html.erb, line 3
  1 <h1>Editing project</h1>
    2 
    3 <%= render 'form' %>
    4 
    5 <%= link_to 'Show', @project %> |
    6 <%= link_to 'Back', projects_path %>

Request info

Request parameters  
{"controller"=>"projects", "action"=>"edit", "project_name"=>"com.test.tester"}

Local Variables

local_assigns  
{}
output_buffer	
nil
_old_virtual_path	
nil
_old_output_buffer	
nil

project_controller

  def edit
    @projects = Project.all
    @project = Project.find_by_project_name(params[:project_name])
  end

  def show
    @projects = Project.all
    @project = Project.find_by_project_name(params[:project_name])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @project, root: false }
    end
  end

Project_model

class Project < ActiveRecord::Base
# ...

 def to_params
		 "#{project_name}"
 end
end

routes

 get    "/projects"                    => "projects#index", as: "projects"                     
  get    "/projects/new"                => "projects#new",   as: "new_project"
  post   "/projects"                    => "projects#create"
  get    "/projects/:project_name"      => "projects#show",  as: "project", :constraints => { :project_name => /com\.\w+\.\w+/ }
  get    "/projects/:project_name/edit" => "projects#edit",  as: "edit_project", :constraints => { :project_name => /com\.\w+\.\w+/ }
  put    "/projects/:project_name"      => "projects#update", :constraints => { :project_name => /com\.\w+\.\w+/ }
  delete "/projects/:project_name"      => "projects#destroy", :constraints => { :project_name => /com\.\w+\.\w+/ }

url

http://localhost:3000/projects/com.test.tester/edit