diff --git a/service_container/tags.rst b/service_container/tags.rst
index 75bd17607ec..34e2145853b 100644
--- a/service_container/tags.rst
+++ b/service_container/tags.rst
@@ -19,8 +19,7 @@ to be used for a specific purpose. Take the following example:
app.twig_extension:
class: AppBundle\Twig\AppExtension
public: false
- tags:
- - { name: twig.extension }
+ tags: [twig.extension]
.. code-block:: xml
@@ -148,13 +147,11 @@ For example, you may add the following transports as services:
app.smtp_transport:
class: \Swift_SmtpTransport
arguments: ['%mailer_host%']
- tags:
- - { name: app.mail_transport }
+ tags: [app.mail_transport]
app.sendmail_transport:
class: \Swift_SendmailTransport
- tags:
- - { name: app.mail_transport }
+ tags: [app.mail_transport]
.. code-block:: xml
@@ -341,6 +338,26 @@ To answer this, change the service declaration:
$definitionSendmail->addTag('app.mail_transport', array('alias' => 'bar'));
$container->setDefinition('app.sendmail_transport', $definitionSendmail);
+.. tip::
+
+ In YAML format, you may provide the tag as a simple string as long as you don't need to specify additional
+ attributes. The following definitions are equivalent.
+
+ .. code-block:: yaml
+
+ services:
+
+ # Compact syntax
+ app.sendmail_transport:
+ class: \Swift_SendmailTransport
+ tags: [app.mail_transport]
+
+ # Verbose syntax
+ app.sendmail_transport:
+ class: \Swift_SendmailTransport
+ tags:
+ - { name: app.mail_transport }
+
Notice that you've added a generic ``alias`` key to the tag. To actually
use this, update the compiler::
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