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    <p>When you call <code>$this-&gt;get("your.service")</code> you are asking the dependency injection container to load that service. You are requesting that it loads one of your controllers which extends Symfony's controller class which extends <a href="http://api.symfony.com/2.0/Symfony/Component/DependencyInjection/ContainerAware.html">ContainerAware</a>. The error you are getting is because the loaded controller is likely trying to access a service like "request" using <code>$this-&gt;container-&gt;get("request")</code> but <code>$this-&gt;container</code> is not set.</p> <p>ContainerAware has a method <code>setContainer</code> which you can actually run when your service is setup by using the <code>calls:</code> argument in services.yml:</p> <pre><code>services: cj.businessbundle.purchase: class: CJ\BusinessBundle\Controller\PurchaseController calls: - [setContainer, [@service_container]] </code></pre> <p>Symfony2 does this for the loaded controller (PurchaseOrderController) but not if you just load a controller class yourself.</p> <p>It would be much better practice to extract the newAction (or the required logic) from PurchaseController as a service itself rather than setting the whole controller as a service. This way both Purchase and PurchaseOrder controllers can call the service to create a new purchase (or whatever newAction does) and you are not loading a whole controller everytime. Check out the <a href="https://github.com/FriendsOfSymfony/FOSUserBundle/blob/master/Model/UserManager.php">FOS user bundle user manager</a> for a good example of a service or <a href="http://symfony.com/doc/2.1/book/service_container.html#what-is-a-service">http://symfony.com/doc/2.1/book/service_container.html#what-is-a-service</a></p>
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    1. CO+1 Nice one @Luke
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    2. CO@Luke Thanks a ton man. Hey can you point something that will have me build an ajax form. Like a purchase order form I want to have add option to add new items to it. like add new item button would add fields to form via ajax
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    3. COThe symfony2 docs have a section on collections and using jQuery (in their example) to add new tags to a task http://symfony.com/doc/2.1/cookbook/form/form_collections.html. Not sure if thats what you mean
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