10. Extra tools¶

10.1. Parameters parser¶

For each route defined the parameter parser allow you to find extra data in the current request, in the resource previously created by using the PropertyAccess component or by using the Expression Language component

10.1.1. Request¶

You need use the following syntax $var_name. It will try to find in the request the key named var_name $request->get(‘var_name’).

# routing.yml

app_user_index:
    path: /products
    methods: [GET]
    defaults:
        _controller: app.controller.user:indexAction
        _sylius:
            criteria: {name: $name}

10.1.2. Resource previously created¶

You need use the following syntax resource.attribute_name. It will try to find the value of the attribute name named attribute_name $accessor->getValue($resource, ‘attribute_name’)).

# routing.yml

app_user_index:
    path: /products
    methods: [POST]
    defaults:
        _controller: app.controller.user:indexAction
        _sylius:
            redirect:
                route: my_route
                parameters: {name: resource.name}

10.1.3. Expression Language component¶

You need use the following syntax expr:resource.my_expression.

# routing.yml

app_user_index:
    path: /customer/orders
    methods: [POST]
    defaults:
        _controller: app.controller.user:indexAction
        _sylius:
            method: findOrderByCustomer
            arguments: ['expr:service("security.context").getToken().getUser()']

Примечание

service: returns a given service (see the example above);
parameter: returns a specific parameter value, aka: expr:parameter("sylius.locale")

10.2. Event Dispatcher¶

The methods ResourceController:createAction, ResourceController:updateAction and ResourceController:deleteAction throw events before and after executing any actions on the current resource. The name of the events used the following pattern app_name.resource.(pre|post)_(create|update|delete).

First, you need to register event listeners, the following example show you how you can do that.

# services.xml

<service id="my_listener" class="MyBundle\MyEventListener">
    <tag name="kernel.event_listener" event="sylius.order.pre_create" method="onOrderPreCreate"/>
</service>

# services.yml

services:
    my_listener:
        class: MyBundle\MyEventListener
        tags:
            - { name: kernel.event_listener, event: sylius.order.pre_create, method: onOrderPreCreate }

After that, you need to create your listener

class MyEventListener
{
    public function onOrderPreCreate(ResourceEvent $event)
    {
        // You can get your resource like that
        $resource = $event->getSubject();

        // You can stop propagation too.
        $event->stop('my.message', array('%amount%' => $resource->getAmount()));
    }
}

Примечание

Caution: you can use subscribers too, you can get more informations there.