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Dynamic configuration

ConfigResolver

Dynamic configuration is handled by a ConfigResolver.

It exposes the hasParameter() and getParameter() methods. You can use them to check the different scopes available for a given namespace to find the appropriate parameter.

In order to work with the ConfigResolver, your dynamic settings must have the following name format: <namespace>.<scope>.parameter.name.

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parameters:
    # Internal configuration
    ezsettings.default.content.default_ttl: 60
    ezsettings.site_group.content.default_ttl: 3600
 
    # Here "myapp" is the namespace, followed by the SiteAccess name as the parameter scope
    # Parameter "my_param" will have a different value in site_group and admin_group
    myapp.site_group.my_param: value
    myapp.admin_group.my_param: another value
    # Defining a default value, for other SiteAccesses
    myapp.default.my_param: Default value

Inside a controller, in site_group SiteAccess, you can use the parameters in the following way (note that the same applies for hasParameter()):

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$configResolver = $this->getConfigResolver();
 
// ezsettings is the default namespace, so no need to specify it
// The following will resolve ezsettings.<siteaccessName>.content.default_ttl
// In the case of site_group, it will return 3600.
// Otherwise it will return the value for ezsettings.default.content.default_ttl (60)
$locationViewSetting = $configResolver->getParameter( 'content.default_ttl' );

// For you own namespace, you need to specify it, here as "myapp"
$myParamSetting = $configResolver->getParameter( 'my_param', 'myapp' );
// $myParamSetting's value will be 'value'
 
// You can also force the scope by naming it explicitly (here as "admin_group")
$myParamSettingAdmin = $configResolver->getParameter( 'my_param', 'myapp', 'admin_group' );
// $myParamSetting's value will be 'another value'

Tip

To learn more about scopes, see SiteAccess documentation.

Both getParameter() and hasParameter() can take three arguments:

  1. $paramName - the name of the parameter
  2. $namespace - your application namespace, myapp in the previous example. If null, the default namespace will be used, which is ezsettings by default.
  3. $scope - a SiteAccess name. If null, the current SiteAccess will be used.

Inject the ConfigResolver in your services

You can use the ConfigResolver in your own services whenever needed. To do this, inject the ezpublish.config.resolver service:

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services:
    App\Service:
        arguments: ['@ezpublish.config.resolver']

You can also use the autowire feature, by type hinting against ConfigResolverInterface.

Tip

For more information about dependency injection, see Service container.

Note

Do not store the retrieved config value unless you know what you are doing. SiteAccess can change during code execution, which means you might work on the wrong value.

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namespace App;

use eZ\Publish\Core\MVC\ConfigResolverInterface;
 
class Service
{
    /**
     * @var \eZ\Publish\Core\MVC\ConfigResolverInterface
     */
    private $configResolver;
 
    public function __construct( ConfigResolverInterface $configResolver )
    {
        $this->configResolver = $configResolver;
    }

    public function someMethodThatNeedConfig()
    {
        $configValue = $this->configResolver->getParameter('my_param', 'myapp');
    }
}