I need to direct modify the $sf_content what is the best workaround?

问题

Situation: only main page is accessible by default, all other pages needs a logged in user. When a module is loaded without user, a login template should be displayed, and no module. In other words, the $sf_content must be emptied in layout.php which is not 100% ok since there is logic in the layout. Is there elegant way for that? I dont think a helper is OK either....

回答1:

Check out security filters, this is one standard way security is designed in symfony. You even can implement your own SecurityFilter class with the functionality you want.

http://symfony.com/legacy/doc/reference/1_4/en/12-Filters#chapter_12_security

回答2:

It is done by default for you by the sfBasicSecurityFilter filter. You just need a good configuration. Read this part of the Jobeet tutorial. You should use sfDoctrineGuardPlugin (or sfGuardPlugin if you using propell) for user authentication.

回答3:

To complete my comments above: There are different ways to override the layout. You could use the methods:

 setLayout($name) 
 //or using foward, which forwards current action to a new one (without browser redirection)    
 forward($module, $action);

inside your action class. In case you wand to modify the layout inside a filter, you can use something simular to this:

class yourFilter extends sfFilter {

    public function execute($filterChain) {
        if($yourConditionForOverrideTheDefaultLayout) {
            //here the syntax to change the layout from the filer   
            $actionStack = $this->getContext()->getActionStack();
            $actionStack->getFirstEntry()->getActionInstance()->setLayout('yourLayout');
        }
        $filterChain->execute();
    }
}

To avoid unnecessary duplication in the layout file you can work with Fragments and Partials.

来源：https://stackoverflow.com/questions/14182070/i-need-to-direct-modify-the-sf-content-what-is-the-best-workaround