Placeholders

Placeholders allow to combining ordered set of blocks (templates or actions) and output them in different places of twig templates. This way, you can customize layouts without modifying the original twig templates.

The placeholder defined by a unique name and ordered items (templates and actions) to render.

The placeholder item defined by a unique name and template or action to render.

The placeholder item can have the following optional properties:

template or action - A path to the TWIG template or controller action that is used to render the item.
applicable - A boolean condition that indicates whether the item must be rendered or not.
acl - The ACL resource(s). Can be a string or array of strings. It can be used to restrict access to the item. If several ACL resources are provided, all of them must grant access for the item to receive the access.
data - Additional data to be passed to TWIG template or controller.

Each property can be a constant or an expression.

The following expressions are supported:

%parameter% - gets a parameter from the DI container
:math:`parameter` - gets a parameter from the context
AcmeClass::MY_CONST - gets a constant
AcmeClass::myMethod - calls the static method without parameters
AcmeClass::myMethod() - calls the static method without parameters
AcmeClass::myMethod(:math:`param1`, %param2%) - calls the static method with parameters
@service->myMethod - calls service’s method without parameters
@service->myMethod() - calls service’s method without parameters
@service->myMethod(:math:`param1`, %param2%) - calls service’s method with parameters
@service - gets the instance of a service

Also, it is possible to use parameters inside expressions, for example:

%acme.class_name%::myMethod() - calls the static method without parameters
Hello :math:`user_name`

Render Placeholders

To render a placeholder in a twig template, put

{% placeholder <placeholder_name> %}

Additional options can be passed to all placeholder child items using the with tag, for example,

{% placeholder <placeholder_name> with {'form' : form} %}

Placeholder Declaration in YAML

Placeholders with their items (templates and actions) can be defined in a bundle in Resource/oro/placeholders.yml

placeholders:
    items:                             # items to use in placeholders (templates or actions)
     <item_name>:                      # unique item name
        template: <template>           # path to the item template
     <another_item_name>:
        action: <action>               # controller action name (e.g., OroSearchBundle:Search:searchBar)

    placeholders:
      <placeholder_name>:
        items:
          <item_name>:
            order: 100                 # item sort order in placeholder
          <another_item_name>:
            order: 200
          <one_more_item_name>: ~      # item sort order is set to 0 when it is not defined explicitly

Override Placeholder Items

You can override the configuration defined in the placeholders.yml file in config/config.yml file at the application level.

oro_ui:
    placeholders:
        <placeholder_name>:
            items:
                <item_name>:
                    remove: true   # remove item from placeholder
        <another_placeholder_name>:
            items:
                <item_name>:
                    order: 200     # change item order in placeholder

Also, you can override the placeholders configuration in another placeholders.yml file defined in a bundle with a higher priority.

Find more examples in placeholders.yml files defined in OroPlatform bundles.