If the option is true, the password is never written into the input field's value. If it is false, it is only written into the input field's value after submitting a form with errors.
The default value for "always_empty" is true.
The semantics of property paths are now:
(1) if a property path is set, it is _always_ respected (relative to the object
of the parent field)
(2) if no property path is set, the object of the parent field is _always_ ignored
Fact (2) allows us to set data into fields that is updated independently of the parent
field (like CSRF tokens, subforms with different objects etc.)
What is missing now is support for subfields that pass the object of the parent field
through to their own subfields. This functionality would be needed for GoogleMapFields,
DateRangeFields etc., which are compositions of individual fields that update the
parent object of the FieldGroup.
There are several alternatives for the latter functionality that should be discussed
in a RFC.
Original explanation from pull request:
I'm Using symfony2 with URL Rewriting to 'hide' index.php.
On form authentication, symfony2 redirect to http://host:port/index.php/login_path instead of http://host:port/login_path. I do understand that, in my case, redirect is set into one of :
FormAuthenticationEntryPoint with getUriForPath()
FormAuthenticationListener with getUriForPath()
Security/Firewal/ExceptionListener with getUri()
This path modify getUri and getUriForPath to :
remove default port from URI
remove script name if not initially present
Currently, ambiguities only arise for PHP files, as PhpFileLoader and AnnotationFileLoader would both claim support. Future conflicts may occur if the XML, YAML, or PHP loaders were to receive Directory and Glob loaders (as annotations have).
Since the "type" parameter is optional, loader resolution will default to awarding resolution to the first loader to claim support. A previous hack in PhpFileLoader to avoid an AnnotationFileLoader conflict was removed, so that should be the only lost backwards compatibility with this patch. Unit tests were also created for the various loader classes, although only the supports() method is being tested.
This implementation was proposed on the symfony-dev mailing list in response to Fabien's RFC for custom loader notation: http://groups.google.com/group/symfony-devs/browse_thread/thread/3104c1a9e45799d2/20fbe393c1afe088
Previously, HttpKernel performed request-stashing. By moving this to the Kernel class, the request is now available immediately after the kernel becomes aware of it. If the kernel is allowed to boot lazily (during the first call to handle()), this also allows an actual master Request to be available during booting.
The old "request" service definition (with a bogus class name) can be replaced with a factory-aware definition that retrieves the request directly from the kernel.
The original HttpKernel class can be deleted, as it's request-stashing will be moved to the Kernel class. FrameworkBundle's list of compiled classes must also be modified to respect this change.
To keep language consistent, three methods were changed in InputOption:
* `InputOption::acceptParameter()` -> `InputOption::acceptValue()`
* `InputOption::isParameterRequired()` -> InputOption::isValueRequired()`
* `InputOption::isParameterOptional()` -> `InputOption::isValueOptional()`
The InputDefinition::asXml() method was also modified to update the `accept_value` and `is_value_required` attributes.
