added logging to translator.

Author: aitboudad

book/translation.rst

@@ -400,6 +400,14 @@ checks translation resources for several different locales:
 3. If the translation still isn't found, Symfony uses the ``fallback`` configuration
    parameter, which defaults to ``en`` (see `Configuration`_).
 
+.. versionadded:: 2.6
+    The ability to log missing translations was introduced in Symfony 2.6.
+
+.. note::
+
+    When Symfony doesn't find a translation in the given locale, it will 
+    add the missing translation to the log file.
+
 .. _book-translation-user-locale:
 
 Handling the User's Locale

reference/configuration/framework.rst

@@ -48,6 +48,10 @@ Configuration
 * `profiler`_
     * `collect`_
     * :ref:`enabled <profiler.enabled>`
+* `translator`_
+    * :ref:`enabled <translator.enabled>`
+    * `fallback`_
+    * `logging`_
 
 secret
 ~~~~~~
@@ -464,6 +468,37 @@ and activate the data collectors by hand::
 
     $profiler->enable();
 
+translator
+~~~~~~~~~~
+
+.. _translator.enabled:
+
+enabled
+.......
+
+**type**: ``boolean`` **default**: ``false``
+
+Whether or not to enable the ``translator`` service in the service container.
+
+fallback
+........
+
+**default**: ``en``
+
+This option is used when the translation key for the current locale wasn't found.
+
+For more details, see :doc:`/book/translation`.
+
+logging
+.......
+
+.. versionadded:: 2.6
+    The ``logging`` option was introduced in Symfony 2.6.
+
+**default**: ``true`` when the debug mode is enabled, ``false`` otherwise.
+
+Logging can be disabled by setting this key to ``false``.
+
 Full default Configuration
 --------------------------
 
@@ -581,6 +616,7 @@ Full default Configuration
             translator:
                 enabled:              false
                 fallback:             en
+                logging:              "%kernel.debug%"
 
             # validation configuration
             validation: