data in json ruby on rails and Extjs

Markror2009 Markror2009 wrote:

Hi all, I start to use ruby on rails with Extjs, in a controller i put this code respond_to do |format|    format.html    format.ext_json { render :json => Collection.find(:all).to_ext_json(:class => Collection) } end and in view i put this code

<div id="collection-grid"></div> <%= ext_datastore_for 'Collection' %> <% javascript_tag do -%>   var collection_column_model = new Ext.grid.ColumnModel([     {id: 'id', header: "#", width: 20, dataIndex: 'id'},     {header: 'name', dataIndex: 'collection[name]'},     {header: 'description', dataIndex: 'collection[description]'}   ]); <% end -%> <%= ext_grid_for 'Collection', :element => 'collection-grid' %>

in the browser i have grid but without data. any one can help me for this. Thank's

I write this mini-tutorial to you: We will using the convencional way.

Requirements: nifty-generators (install using gem install nifty-generators)

1. Create the application: rails contacts 2. Create the database: rake db:create 3. Create layout using nifty_layout: script/generate nifty_layout 4. Create our Contact using nifty_scaffold: script/generate nifty_scaffold name:string phone:string email:string 5. Create the table contacts: rake db:migrate

In config/initializers/new_rails_defaults.rb change following:

  ActiveRecord::Base.include_root_in_json = true


  ActiveRecord::Base.include_root_in_json = false

Open your layout in app/views/layout/application.html.erb and add the follow:

    <%= stylesheet_link_tag '/ext/resources/css/ext-all' %>     <%= javascript_include_tag '/ext/adapter/ext/ext-base' %>     <%= javascript_include_tag '/ext/ext-all' %>

I'm assume your ext folder is in public.

Now open your contacts_controller and change the action index to:

def index   @contacts = Contact.all

  respond_to do |format|     format.html     format.json { render :json => @contacts.to_json }   end end

Open the app/views/contacts/index.html.erb and change to:

<div id="grid"></div> <script>   function index(){     var store = new{       url: '/contacts.json',       id: 'store',       idProperty: 'id',       fields: [ 'id', 'name', 'email', 'phone']     });


    var grid = new Ext.grid.GridPanel({       title: 'Contacts',       width: 400,       height: 300,       frame: true,       renderTo: 'grid',       store: store,       columns: [         { header: 'NAME', dataIndex: 'name', sortable: true },         { header: 'EMAIL', dataIndex: 'email', sortable: true },         { header: 'PHONE', dataIndex: 'phone', sortable: true }       ]     });   }

  Ext.onReady(index()); </script

Run your server by script/server and fun.

Atc., Kirk Patrick