Category

_form.html.erb

<%= simple_form_for(@category) do |f| %>
  <%= f.error_notification %>

  <div class="form-inputs">
    <%= f.input :name %>
    <%= f.input :description %>
    <%= f.input :parent %>
  </div>

  <div class="form-actions">
    <%= f.button :submit %>
  </div>
<% end %>

categories_controller.rb

class CategoriesController < ApplicationController
  # GET /categories
  # GET /categories.json
  def index
    @categories = Category.all

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @categories }
    end
  end

  # GET /categories/1
  # GET /categories/1.json
  def show
    @category = Category.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @category }
    end
  end

  # GET /categories/new
  # GET /categories/new.json
  def new
    @category = Category.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @category }
    end
  end

  # GET /categories/1/edit
  def edit
    @category = Category.find(params[:id])
  end

  # POST /categories
  # POST /categories.json
  def create
    @category = Category.new(params[:category])

    respond_to do |format|
      if @category.save
        format.html { redirect_to @category, notice: 'Category was successfully created.' }
        format.json { render json: @category, status: :created, location: @category }
      else
        format.html { render action: "new" }
        format.json { render json: @category.errors, status: :unprocessable_entity }
      end
    end
  end

  # PUT /categories/1
  # PUT /categories/1.json
  def update
    @category = Category.find(params[:id])

    respond_to do |format|
      if @category.update_attributes(params[:category])
        format.html { redirect_to @category, notice: 'Category was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @category.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /categories/1
  # DELETE /categories/1.json
  def destroy
    @category = Category.find(params[:id])
    @category.destroy

    respond_to do |format|
      format.html { redirect_to categories_url }
      format.json { head :no_content }
    end
  end
end

category.rb

class Category < ActiveRecord::Base
  attr_accessible :description, :name, :parent
end

ErreurDebug

NoMethodError in Categories#index

Showing /home/mon_beau_path_vers_mon_app/web/annuaire/app/views/categories/index.html.erb where line #17 raised:

undefined method `parent' for #<Category:0x0000000454e6e8>

Extracted source (around line #17):

14:   <tr>
15:     <td><%= category.name %></td>
16:     <td><%= category.description %></td>
17:     <td><%= category.parent %></td>
18:     <td><%= link_to 'Show', category %></td>
19:     <td><%= link_to 'Edit', edit_category_path(category) %></td>
20:     <td><%= link_to 'Destroy', category, method: :delete, data: { confirm: 'Are you sure?' } %></td>



app/views/categories/index.html.erb:17:in `block in _app_views_categories_index_html_erb___690230365758431318_33118580'
app/views/categories/index.html.erb:13:in `each'
app/views/categories/index.html.erb:13:in `_app_views_categories_index_html_erb___690230365758431318_33118580'
app/controllers/categories_controller.rb:7:in `index'

index.html.erb

<h1>Listing categories</h1>

<table>
  <tr>
    <th>Name</th>
    <th>Description</th>
    <th>Parent</th>
    <th></th>
    <th></th>
    <th></th>
  </tr>

<% @categories.each do |category| %>
  <tr>
    <td><%= category.name %></td>
    <td><%= category.description %></td>
    <td><%= category.parent %></td>
    <td><%= link_to 'Show', category %></td>
    <td><%= link_to 'Edit', edit_category_path(category) %></td>
    <td><%= link_to 'Destroy', category, method: :delete, data: { confirm: 'Are you sure?' } %></td>
  </tr>
<% end %>
</table>

<br />

<%= link_to 'New Category', new_category_path %>

routes.rb

Annuaire::Application.routes.draw do

  authenticated :user do
    root :to => 'home#index'
  end
  
  root :to => "home#index"
  devise_for :users
  resources :users, :categories

end