undefined method `render_component'

Solution
According to the issue here, in Rails 2.3 the render_component has been removed.

Install the render_component from:

script/plugin install git://github.com/lackac/render_component.git -r rails-edge

and restart your server, and it should be working.

Solution

1. Install the ActiveScaffold plugin:

   script/plugin install git://github.com/activescaffold/active_scaffold.git -r rails-2.2

2. In your layout (model or application for all models) add the following:

   <%= javascript_include_tag :defaults %>
   <%= active_scaffold_includes %>

3. In your controller file delete all the standard scaffolding code and add one line, so that your new controller should look like:

   class SomethingsController < ApplicationController
     active_scaffold :something
   end

4. To configure a RESTful scaffold add the following to your route.rb file:

   map.resources :somethings, :active_scaffold => true

5. Delete the views that were created from the standard rails scaffolding in the views/somethings folder (edit, show, index ...)
6. Restart your server

You should now have an active scaffold for your model.

Solution

1. Create a file called active_scaffold_overrides.css in ror_project/public/stylesheets
2. Copy the css code from ror_project/vendor/plugins/active_scaffold/frontends/default/stylesheets/stylesheet.css and paste it in to the file created in the previous step.
3. Create a directory my_images in ror_project/public/images/activescaffold to hold your images.
4. Copy to the new directory the images you want to use in the application.
5. In the active_scaffold_overrides.css file find the section named:

   /* Table :: Actions (Edit,Delete) .... */

   and for each action that you want to use an icon add (ie edit)

   .active_scaffold tr.record td.actions a.edit {
       display:     block;
       width:        16px;
       height:       16px;
       background: transparent url(../../../images/active_scaffold/my_images/image.png) no-repeat right 50%;
   }

6. In the application.rb, if you want the links to be the same for the whole application add:

   ActiveScaffold.set_defaults do |config|
       config.update.link.label =""
   end

7. in your layout/application.rhtml (create one if you don’t already have one), include

   <%= stylesheet_link_tag "active_scaffold_overrides" %>

8. Restart webrick/mongrel

You need to have to functionally test your controller when you are using ActiveScaffold. There are pieces of code that tell you how to do that on a normal ror application (ie without ActiveScaffold), like recipe 7.17 on the Rails Cookbook, or a fragment of code in an Active Scaffold application, but they don’t have the full details.

Solution

Here is an attempt to give some more detailed step by step instructions on how to do it.

1. The migration for the example customer model.

class CreateCustomers < ActiveRecord::Migration
  def self.up
    # Create customers table
    create_table  :customers do |t|
      t.column  :customer_code, :string, :null => false
      t.column  :created_at, :datetime
      t.column  :updated_at, :datetime
    end
  end
end

2. The customer model, with the extra function to display the customer code

class Customer < ActiveRecord::Base

  has_many    :numbers

  def to_label
    "#{customer_code}"
  end
end

3. The customer controller app/controllers/customers_controller.rb, using the Active Scaffold

class CustomersController < ApplicationController

  active_scaffold :customer do |config|
    config.list.columns = [:customer_code, :numbers, :created_at, :updated_at]
    config.columns[:customer_code].inplace_edit = true
 end

end

4. The fixtures YML file test/fixtures/customers.yml

first_customer:
  id:               1
  customer_code:    123
  created_at:       2007-09-26 11:17:07
  updated_at:       2007-09-26 11:17:07

second_customer:
  id:               2
  customer_code:    456
  created_at:       2007-09-26 11:17:13
  updated_at:       2007-09-26 11:17:13

5. And here are some functions to test some pages and a full CRUD test

require File.dirname(__FILE__) + '/../test_helper'
require 'customers_controller'

class CustomerControllerTest < Test::Unit::TestCase
  fixtures  :customers

  def setup
    @controller = CustomersController.new
    @request = ActionController::TestRequest.new
    @response = ActionController::TestResponse.new
  end

  def test_index
    get :index
    assert_response :success
    assert_template 'list'
  end

  def test_new
    get :new
    assert_response :success
    assert_template 'create_form'
  end

  def test_edit
    get :edit, :id => customers(:first_customer).id
    assert_response :success
    assert_template 'update_form'
  end

  def test_show
    get :show, :id => customers(:first_customer).id
    assert_response :success
    assert_template 'show'
  end

  def test_customer_controller_CRUD

    # CREATE
    # Get the number of records
    record_no = Customer.count
    # Create a new record
    post  :create, {"commit"=>"Create", :record=>{"customer_code"=>"890"}}
    # Assert that the record is not nil
    assert_not_nil  assigns("record")
    # Look that the number of records has been increased by 1
    assert_equal  record_no+1, Customer.count

    # UPDATE
    # Get the number of records
    record_no = Customer.count
    # Update a record
    new_customer_code = "987"
    put :update, {"commit"=>"Update",:id=>customers(:first_customer).id,
                                      :record=>{"customer_code"=>new_customer_code}}
    # Assert that the record is not nil
    assert_not_nil  assigns("record")
    # Look that the number of records has stayed the same
    assert_equal  record_no, Customer.count
    # Check that the update took place
    customer = Customer.find(customers(:first_customer).id)
    assert_equal  new_customer_code, customer.customer_code

    # DELETE
    # Get the number of records
    record_no = Customer.count
    # Delete a record
    delete  :destroy, :id => customers(:first_customer).id
    # Look that the number of records has been decreased by 1
    assert_equal  record_no-1, Customer.count
  end

end

i) if you want to affect the settings in all the application add the following to the top of your controllers/application.rb

ActiveSupport::CoreExtensions::Date::Conversions::DATE_FORMAT[:default] = ‘%d-%m-%Y’
ii) If you only want to affect the settings of the calendar in one specific controller, then add the same line only to the controller that you want:

ActiveSupport::CoreExtensions::Date::Conversions::DATE_FORMAT[:default] = '%d-%m-%Y'