Previously it would crash when given a container with an unresolved
parameter. This change will instead show the parameter name on the
final diagram, instead of the class name.
* 2.4:
unified return null usages
[Validator] added Japanese translation
Textarea value should default to empty string instead of null.
Fix doc blocks
[Process] Fix#10681, process are failing on Windows Server 2003
updated doc
[Security] fix DBAL connection typehint
[HttpFoundation] status 201 is allowed to have a body
unified return null usages
Conflicts:
src/Symfony/Component/DependencyInjection/ContainerBuilder.php
src/Symfony/Component/DomCrawler/Crawler.php
src/Symfony/Component/Security/Core/Authentication/Provider/PreAuthenticatedAuthenticationProvider.php
* 2.3:
Textarea value should default to empty string instead of null.
Fix doc blocks
[Process] Fix#10681, process are failing on Windows Server 2003
[Security] fix DBAL connection typehint
[HttpFoundation] status 201 is allowed to have a body
unified return null usages
Conflicts:
src/Symfony/Component/Console/Helper/DescriptorHelper.php
src/Symfony/Component/DependencyInjection/ContainerBuilder.php
src/Symfony/Component/Finder/Tests/Iterator/RecursiveDirectoryIteratorTest.php
src/Symfony/Component/Form/Extension/Core/DataTransformer/IntegerToLocalizedStringTransformer.php
src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php
* 2.4:
made types consistent with those defined in Hack
made {@inheritdoc} annotations consistent across the board
made {@inheritdoc} annotations consistent across the board
fixed types in phpdocs
[Debug] Fixed ClassNotFoundFatalErrorHandler on windows.
made phpdoc types consistent with those defined in Hack
Add support Thai translations
[Validator] Add missing czech translations
made types consistent with those defined in Hack
removed extra/unsupported arguments
[HttpKernel] fixed an error message
[TwigBundle] removed undefined argument
[Translation] Make IcuDatFileLoader/IcuResFileLoader::load invalid resource compatible with HHVM.
Conflicts:
src/Symfony/Component/Console/Helper/TableHelper.php
src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
src/Symfony/Component/Form/FormError.php
src/Symfony/Component/HttpKernel/Debug/TraceableEventDispatcher.php
src/Symfony/Component/Process/ProcessPipes.php
src/Symfony/Component/PropertyAccess/PropertyAccessor.php
src/Symfony/Component/Security/Acl/Dbal/MutableAclProvider.php
src/Symfony/Component/Security/Http/RememberMe/TokenBasedRememberMeServices.php
src/Symfony/Component/Translation/Dumper/FileDumper.php
src/Symfony/Component/Validator/ConstraintViolation.php
src/Symfony/Component/Validator/Constraints/EmailValidator.php
src/Symfony/Component/Validator/ExecutionContextInterface.php
src/Symfony/Component/Validator/Mapping/BlackholeMetadataFactory.php
* 2.3:
made {@inheritdoc} annotations consistent across the board
fixed types in phpdocs
made phpdoc types consistent with those defined in Hack
Add support Thai translations
made types consistent with those defined in Hack
removed extra/unsupported arguments
[HttpKernel] fixed an error message
[TwigBundle] removed undefined argument
[Translation] Make IcuDatFileLoader/IcuResFileLoader::load invalid resource compatible with HHVM.
Conflicts:
src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Fixtures/php/lazy_service.php
src/Symfony/Bundle/FrameworkBundle/Command/ContainerDebugCommand.php
src/Symfony/Bundle/FrameworkBundle/Templating/Loader/FilesystemLoader.php
src/Symfony/Bundle/WebProfilerBundle/EventListener/WebDebugToolbarListener.php
src/Symfony/Component/Config/Definition/ReferenceDumper.php
src/Symfony/Component/Console/Helper/DescriptorHelper.php
src/Symfony/Component/Debug/ErrorHandler.php
src/Symfony/Component/Finder/Tests/Iterator/RecursiveDirectoryIteratorTest.php
src/Symfony/Component/Form/Extension/Core/DataTransformer/IntegerToLocalizedStringTransformer.php
src/Symfony/Component/Form/Tests/Extension/Core/DataMapper/PropertyPathMapperTest.php
src/Symfony/Component/HttpFoundation/Response.php
src/Symfony/Component/HttpFoundation/StreamedResponse.php
src/Symfony/Component/HttpKernel/Debug/TraceableEventDispatcher.php
src/Symfony/Component/HttpKernel/EventListener/ProfilerListener.php
src/Symfony/Component/HttpKernel/Fragment/FragmentHandler.php
src/Symfony/Component/HttpKernel/Fragment/RoutableFragmentRenderer.php
src/Symfony/Component/HttpKernel/Kernel.php
src/Symfony/Component/HttpKernel/Tests/Fixtures/KernelForTest.php
src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
src/Symfony/Component/Security/Core/Authorization/AccessDecisionManager.php
src/Symfony/Component/Stopwatch/StopwatchPeriod.php
src/Symfony/Component/Translation/TranslatorInterface.php
src/Symfony/Component/Validator/ConstraintValidatorFactory.php
* 2.4:
added missing unit test
fixed too greedy replacements
fixed protocol-relative URLs
added override power to server parameters provided on request method
made parsing controllers more robust
Fixed YamlFileLoader imports path
* 2.3:
added missing unit test
fixed too greedy replacements
fixed protocol-relative URLs
added override power to server parameters provided on request method
made parsing controllers more robust
Fixed YamlFileLoader imports path
Conflicts:
src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php
YamlFileLoader used the resource name as the current directory during import, which can cause a failed import when using a relative path. Using the $path variable output from the locator is consistent with other loaders and fixes the bug.
* 2.4:
[Form][2.3] Fixes empty file-inputs getting treated as extra field.
changed some PHPUnit assertions to more specific ones
fixed Kernel::stripComments() normalizing new-lines
added a BC comment
Update FileLoader to fix issue #10339
bumped Symfony version to 2.3.12
updated VERSION for 2.3.11
update CONTRIBUTORS for 2.3.11
updated CHANGELOG for 2.3.11
Throw exception when unable to normalize embedded object
Fixed evaluation of short circuit operators
Follow-up to #10312: Fixed minor performance related issues in Yaml\Inline.
[2.4][HttpKernel] Fix issue #10209 When the profiler has `only_exception` option activated and a subrequest throw an exception, the parent profile cannot be found.
* 2.3:
changed some PHPUnit assertions to more specific ones
fixed Kernel::stripComments() normalizing new-lines
added a BC comment
Update FileLoader to fix issue #10339
* 2.4:
[Security] fixed pre/post authentication checks
fixed missing use statements
Updated lithuanian validator translation: changed vartotojas to naudotojas as it is more proper term.
Fixed CSS
[Intl] Added round support for ROUND_CEILING, ROUND_FLOOR, ROUND_DOWN, ROUND_UP
[HttpFoundation] Throw proper exception when invalid data is passed to JsonResponse class
addressed == -> === suggestion
Fixed#9020 - Added support for collections in service#parameters
fixes PSR-0 issues in tests
adjusted behavior to always copy override on url files
Skips test that need full lib-intl.
* 2.3:
[Security] fixed pre/post authentication checks
Updated lithuanian validator translation: changed vartotojas to naudotojas as it is more proper term.
Fixed CSS
[HttpFoundation] Throw proper exception when invalid data is passed to JsonResponse class
addressed == -> === suggestion
Fixed#9020 - Added support for collections in service#parameters
fixes PSR-0 issues in tests
adjusted behavior to always copy override on url files
Skips test that need full lib-intl.
Conflicts:
src/Symfony/Component/Security/Acl/Tests/Permission/MaskBuilderTest.php
src/Symfony/Component/Security/Core/Tests/Authentication/Token/RememerMeTokenTest.php
src/Symfony/Component/Security/Core/Tests/User/AccountCheckerTest.php
src/Symfony/Component/Security/Core/Tests/User/InMemoryProviderTest.php
src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationFailureHandlerTest.php
src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationSuccessHandlerTest.php
src/Symfony/Component/Security/Tests/Core/Authentication/Token/RememberMeTokenTest.php
src/Symfony/Component/Security/Tests/Core/Authentication/Token/RememerMeTokenTest.php
src/Symfony/Component/Security/Tests/Core/User/AccountCheckerTest.php
src/Symfony/Component/Security/Tests/Core/User/InMemoryProviderTest.php
src/Symfony/Component/Security/Tests/Core/User/InMemoryUserProviderTest.php
src/Symfony/Component/Security/Tests/Core/User/UserCheckerTest.php
* 2.4:
[Security] simplified some unit tests
[Security] made code easier to understand, added some missing unit tests
[DependencyInjection] fixed InlineServiceDefinitionsPass to not inline a service if it's part of the current definition (to avoid an infinite loop)
[DomCrawler] Fixed creating form objects from form nodes.
disabled php.ini changes when using HHVM in .travis.yml
[Process] fixed HHVM support
Add support for HHVM in the getting of the PHP executable
[Security] fixed error 500 instead of 403 if previous exception is provided to AccessDeniedException
* 2.3:
[Security] made code easier to understand, added some missing unit tests
[DependencyInjection] fixed InlineServiceDefinitionsPass to not inline a service if it's part of the current definition (to avoid an infinite loop)
[DomCrawler] Fixed creating form objects from form nodes.
disabled php.ini changes when using HHVM in .travis.yml
[Process] fixed HHVM support
Add support for HHVM in the getting of the PHP executable
[Security] fixed error 500 instead of 403 if previous exception is provided to AccessDeniedException
* 2.4: (44 commits)
[FrameworkBundle] Add missing license headers
Fix parent serialization of user object
[DependencyInjection] fixed typo
added condition to avoid skipping tests on JSON_PRETTY support
add memcache, memcached, and mongodb extensions to run skipped tests
[DependencyInjection] Fixed support for backslashes in service ids.
fix#9356 [Security] Logger should manipulate the user reloaded from provider
[FrameworkBundle] Added extra details in XMLDescriptor to improve container description
fixed CS
Crawler default namespace fix
[BrowserKit] fixes#8311 CookieJar is totally ignorant of RFC 6265 edge cases
[HttpFoundation] fixed constants that do exist in 2.3 (only in 2.4)
fix 5528 let ArrayNode::normalizeValue respect order of value array provided
fix#7243 allow 0 as arraynode name
Fixed issue in BaseDateTimeTransformer when invalid timezone cause Transformation filed exception (closes#9403).
BinaryFileResponse should also return 416 or 200 on some range-requets
fix deprecated usage and clarify constructor defaults for number formatter
Bumping dependency to ProxyManager to allow testing against the new 0.5.x branch changes
Do normalization on tag options
bumped Symfony version to 2.3.9
...
* 2.3: (31 commits)
Fix parent serialization of user object
[DependencyInjection] fixed typo
add memcache, memcached, and mongodb extensions to run skipped tests
[DependencyInjection] Fixed support for backslashes in service ids.
fix#9356 [Security] Logger should manipulate the user reloaded from provider
[BrowserKit] fixes#8311 CookieJar is totally ignorant of RFC 6265 edge cases
[HttpFoundation] fixed constants that do exist in 2.3 (only in 2.4)
fix 5528 let ArrayNode::normalizeValue respect order of value array provided
fix#7243 allow 0 as arraynode name
Fixed issue in BaseDateTimeTransformer when invalid timezone cause Transformation filed exception (closes#9403).
BinaryFileResponse should also return 416 or 200 on some range-requets
Do normalization on tag options
bumped Symfony version to 2.3.9
updated VERSION for 2.3.8
update CONTRIBUTORS for 2.3.8
updated CHANGELOG for 2.3.8
[Filesystem] Changed the mode for a target file in copy() to be write only.
[Console] fixed CS
fixed TableHelper when cell value has new line
Improved and fixed grammar mistakes. Added pluralized messages
...
Conflicts:
src/Symfony/Component/BrowserKit/Cookie.php
src/Symfony/Component/HttpKernel/Kernel.php
src/Symfony/Component/Routing/Matcher/UrlMatcher.php
This PR was squashed before being merged into the 2.5-dev branch (closes#9668).
Discussion
----------
[DepdencyInjection] forgot to add definition of dumped container member variable parameters
| Q | A
| ------------- | ---
| Bug fix? | yes
| New feature? | no
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | #5408
| License | MIT
| Doc PR | n/a
this fixes the allowing of access to parameters property of the dumped container
Commits
-------
5b02d3f [DepdencyInjection] forgot to add definition of dumped container member variable parameters
* 2.3:
Fixed mistake in upgrade docu
Container::camelize also takes backslashes into consideration
fixed typos
fixed @expectedException class names
fixed some typos
fixed @expectedException class names
Typo and better wording for german validator translation
* 2.3: (24 commits)
Add german translation for several validators (Greater/Equal/Less)
No Entity Manager defined exception
fixed CS
[Acl] Fix for issue #9433
[Validator] fix docblock typos
[DependencyInjection] removed the unused Reference and Parameter classes use statements from the compiled container class
Removed useless check if self::$trustProxies is set
Fix mistake in translation's service definition.
if handler_id is identical to null fix
CS fix
Fixed ModelChoiceList tests in Propel1 bridge.
[AclProvider] Fix incorrect behaviour when partial results returned from cache
Check if the pipe array is empty before calling stream_select()
[Intl] fixed datetime test as described in #9455
bumped Symfony version to 2.3.8
updated VERSION for 2.3.7
updated CHANGELOG for 2.3.7
re-factor Propel1 ModelChoiceList
[Form] Added method Form::getClickedButton() to remove memory leak in FormValidator
[Locale] fixed the failing test described in #9455
...
Conflicts:
src/Symfony/Bridge/Propel1/Form/ChoiceList/ModelChoiceList.php
src/Symfony/Bridge/Propel1/Tests/Fixtures/ItemQuery.php
src/Symfony/Bridge/Propel1/Tests/Form/ChoiceList/ModelChoiceListTest.php
src/Symfony/Bridge/Propel1/Tests/Propel1TestCase.php
src/Symfony/Component/Form/Tests/CompoundFormTest.php
src/Symfony/Component/HttpKernel/Kernel.php
src/Symfony/Component/Process/Process.php
* 2.2:
No Entity Manager defined exception
fixed CS
[Acl] Fix for issue #9433
[Validator] fix docblock typos
[DependencyInjection] removed the unused Reference and Parameter classes use statements from the compiled container class
Fix mistake in translation's service definition.
if handler_id is identical to null fix
CS fix
Fixed ModelChoiceList tests in Propel1 bridge.
[AclProvider] Fix incorrect behaviour when partial results returned from cache
Check if the pipe array is empty before calling stream_select()
re-factor Propel1 ModelChoiceList
[Locale] fixed the failing test described in #9455
[Process] fix phpdoc and timeout of 0
bug #9445 [BrowserKit] fixed protocol-relative url redirection
Conflicts:
src/Symfony/Component/BrowserKit/Tests/ClientTest.php
src/Symfony/Component/Locale/Tests/Stub/StubIntlDateFormatterTest.php
* 2.3: (25 commits)
bumped Symfony version to 2.2.11
updated VERSION for 2.2.10
update CONTRIBUTORS for 2.2.10
updated CHANGELOG for 2.2.10
fixed version
Request::overrideGlobals() may call invalid ini value
Force Luhn Validator to only work with strings
Fixed bug with lazy services
[Translation] fixed the error in the dumper test as described in #9475
deleted mixing string concatenation inside a sprintf
"__call()" should be displayed only if $this->magicCall is true
[Console] fix phpdoc and constructor default value
Add media-query for printing: Do not print the toolbar.
Fix ProgressHelper redraw when redrawFreq is greater than 1
Update toolbar.css.twig
slovenian translations fixed
slovenian translations fixed
[DependencyInjection] fixed YamlDumper did not make services private.
[FrameworkBundle] fix routing container parameter exception message
[Form] fix and unify phpdoc
...
Conflicts:
src/Symfony/Component/Console/Helper/ProgressHelper.php
src/Symfony/Component/DependencyInjection/ContainerBuilder.php
src/Symfony/Component/HttpKernel/Kernel.php
* 2.2:
slovenian translations fixed
[DependencyInjection] fixed YamlDumper did not make services private.
[FrameworkBundle] fix routing container parameter exception message
update CONTRIBUTORS
added content length header to BinaryFileResponse
[Routing] added working test case for issue #5135
* 2.3:
fixed Client when using the terminable event
Fix problem with Windows file links (backslash in JavaScript string)
[Security] fixed wrong phpdoc
[DependencyInjection] Prevented inlining of lazy loaded private service definitions.
[Routing] removed extra argument
[HttpFoundation] Header `HTTP_X_FORWARDED_PROTO` can contain various values Some proxies use `ssl` instead of `https`, as well as Lighttpd mod_proxy allows value chaining (`https, http`, where `https` is always first when request is encrypted).
Added doc comments
Conflicts:
src/Symfony/Component/Routing/Router.php
src/Symfony/Component/Security/Http/Firewall.php
This PR was merged into the master branch.
Discussion
----------
New Component: Expression Language
| Q | A
| ------------- | ---
| Bug fix? | no
| New feature? | yes
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | #8850, #7352
| License | MIT
| Doc PR | not yet
TODO:
- [ ] write documentation
- [x] add tests for the new component
- [x] implement expression support for access rules in the security component
- [x] find a better character/convention for expressions in the YAML format
- [x] check the performance of the evaluation mode
- [x] better error messages in the evaluation mode
- [x] add support in the Routing
- [x] add support in the Validator
The ExpressionLanguage component provides an engine that can compile and
evaluate expressions.
An expression is a one-liner that returns a value (mostly, but not limited to, Booleans).
It is a strip-down version of Twig (only the expression part of it is
implemented.) Like Twig, the expression is lexed, parsed, and
compiled/evaluated. So, it is immune to external injections by design.
If we compare it to Twig, here are the main big differences:
* only support for Twig expressions
* no ambiguity for calls (foo.bar is only valid for properties, foo['bar'] is only valid for array calls, and foo.bar() is required for method calls)
* no support for naming conventions in method calls (if the method is named getFoo(), you must use getFoo() and not foo())
* no notion of a line for errors, but a cursor (we are mostly talking about one-liners here)
* removed everything specific to the templating engine (like output escaping or filters)
* no support for named arguments in method calls
* only one extension point with functions (no possibility to define new operators, ...)
* and probably even more I don't remember right now
* there is no need for a runtime environment, the compiled PHP string is self-sufficient
An open question is whether we keep the difference betweens arrays and hashes.
The other big difference with Twig is that it can work in two modes (possible
because of the restrictions described above):
* compilation: the expression is compiled to PHP and is self-sufficient
* evaluation: the expression is evaluated without being compiled to PHP (the node tree produced by the parser can be serialized and evaluated afterwards -- so it can be saved on disk or in a database to speed up things when needed)
Let's see a simple example:
```php
$language = new ExpressionLanguage();
echo $language->evaluate('1 + 1');
// will echo 2
echo $language->compile('1 + 2');
// will echo "(1 + 2)"
```
The language supports:
* all basic math operators (with precedence rules):
* unary: not, !, -, +
* binary: or, ||, and, &&, b-or, b-xor, b-and, ==, ===, !=, !==, <, >, >=, <=, not in, in, .., +, -, ~, *, /, %, **
* all literals supported by Twig: strings, numbers, arrays (`[1, 2]`), hashes
(`{a: "b"}`), Booleans, and null.
* simple variables (`foo`), array accesses (`foo[1]`), property accesses
(`foo.bar`), and method calls (`foo.bar(1, 2)`).
* the ternary operator: `true ? true : false` (and all the shortcuts
implemented in Twig).
* function calls (`constant('FOO')` -- `constant` is the only built-in
functions).
* and of course, any combination of the above.
The compilation is better for performances as the end result is just a plain PHP string without any runtime. For the evaluation, we need to tokenize, parse, and evaluate the nodes on the fly. This can be optimized by using a `ParsedExpression` or a `SerializedParsedExpression` instead:
```php
$nodes = $language->parse($expr, $names);
$expression = new SerializedParsedExpression($expr, serialize($nodes));
// You can now store the expression in a DB for later reuse
// a SerializedParsedExpression can be evaluated like any other expressions,
// but under the hood, the lexer and the parser won't be used at all, so it''s much faster.
$language->evaluate($expression);
```
That's all folks!
I can see many use cases for this new component, and we have two use cases in
Symfony that we can implement right away.
## Using Expressions in the Service Container
The first one is expression support in the service container (it would replace
#8850) -- anywhere you can pass an argument in the service container, you can
use an expression:
```php
$c->register('foo', 'Foo')->addArgument(new Expression('bar.getvalue()'));
```
You have access to the service container via `this`:
container.get("bar").getvalue(container.getParameter("value"))
The implementation comes with two functions that simplifies expressions
(`service()` to get a service, and `parameter` to get a parameter value). The
previous example can be simplified to:
service("bar").getvalue(parameter("value"))
Here is how to use it in XML:
```xml
<parameters>
<parameter key="value">foobar</parameter>
</parameters>
<services>
<service id="foo" class="Foo">
<argument type="expression">service('bar').getvalue(parameter('value'))</argument>
</service>
<service id="bar" class="Bar" />
</services>
```
and in YAML (I chose the syntax randomly ;)):
```yaml
parameters:
value: foobar
services:
bar:
class: Bar
foo:
class: Foo
arguments: [@=service("bar").getvalue(parameter("value"))]
```
When using the container builder, Symfony uses the evaluator, but with the PHP
dumper, the compiler is used, and there is no overhead as the expression
engine is not needed at runtime. The expression above would be compiled to:
```php
$this->get("bar")->getvalue($this->getParameter("value"))
```
## Using Expression for Security Access Control Rules
The second use case in Symfony is for access rules.
As we all know, the way to configure the security access control rules is confusing, which might lead to insecure applications (see http://symfony.com/blog/security-access-control-documentation-issue for more information).
Here is how the new `allow_if` works:
```yaml
access_control:
- { path: ^/_internal/secure, allow_if: "'127.0.0.1' == request.getClientIp() or has_role('ROLE_ADMIN')" }
```
This one restricts the URLs starting with `/_internal/secure` to people browsing from the localhost. Here, `request` is the current Request instance. In the expression, there is access to the following variables:
* `request`
* `token`
* `user`
And to the following functions:
* `is_anonymous`
* `is_authenticated`
* `is_fully_authenticated`
* `is_rememberme`
* `has_role`
You can also use expressions in Twig, which works well with the `is_granted` function:
```jinja
{% if is_granted(expression('has_role("FOO")')) %}
...
{% endif %}
```
## Using Expressions in the Routing
Out of the box, Symfony can only match an incoming request based on some pre-determined variables (like the path info, the method, the scheme, ...). But some people want to be able to match on more complex logic, based on other information of the Request object. That's why we introduced `RequestMatcherInterface` recently (but we no default implementation in Symfony itself).
The first change I've made (not related to expression support) is implement this interface for the default `UrlMatcher`. It was simple enough.
Then, I've added a new `condition` configuration for Route objects, which allow you to add any valid expression. An expression has access to the `request` and to the routing `context`.
Here is how one would configure it in a YAML file:
```yaml
hello:
path: /hello/{name}
condition: "context.getMethod() in ['GET', 'HEAD'] and request.headers.get('User-Agent') =~ '/firefox/i'"
```
Why do I keep the context as all the data are also available in the request? Because you can also use the condition without using the RequestMatcherInterface, in which case, you don't have access to the request. So, the previous example is equivalent to:
```yaml
hello:
path: /hello/{name}
condition: "request.getMethod() in ['GET', 'HEAD'] and request.headers.get('User-Agent') =~ '/firefox/i'"
```
When using the PHP dumper, there is no overhead as the condition is compiled. Here is how it looks like:
```php
// hello
if (0 === strpos($pathinfo, '/hello') && preg_match('#^/hello/(?P<name>[^/]++)$#s', $pathinfo, $matches) && (in_array($context->getMethod(), array(0 => "GET", 1 => "HEAD")) && preg_match("/firefox/i", $request->headers->get("User-Agent")))) {
return $this->mergeDefaults(array_replace($matches, array('_route' => 'hello')), array ());
}
```
Be warned that conditions are not taken into account when generating a URL.
## Using Expressions in the Validator
There is a new Expression constraint that you can put on a class. The expression is then evaluated for validation:
```php
use Symfony\Component\Validator\Constraints as Assert;
/**
* @Assert\Condition(condition="this.getFoo() == 'fo'", message="Not good!")
*/
class Obj
{
public function getFoo()
{
return 'foo';
}
}
```
In the expression, you get access to the current object via the `this` variable.
## Dynamic annotations
The expression language component is also very useful in annotations. the SensoLabs FrameworkExtraBundle leverages this possibility to implement HTTP validation caching in the `@Cache` annotation and to add a new `@Security` annotation (see sensiolabs/SensioFrameworkExtraBundle#238.)
Commits
-------
d4ebbfd [Validator] Renamed Condition to Expression and added possibility to set it onto properties
a3b3a78 [Validator] added a constraint that runs an expression
1bcfb40 added optimized versions of expressions
984bd38 mades things more consistent for the end user
d477f15 [Routing] added support for expression conditions in routes
86ac8d7 [ExpressionLanguage] improved performance
e369d14 added a Twig extension to create Expression instances
38b7fde added support for expression in control access rules
2777ac7 [HttpFoundation] added ExpressionRequestMatcher
c25abd9 [DependencyInjection] added support for expressions in the service container
3a41781 [ExpressionLanguage] added support for regexes
9d98fa2 [ExpressionLanguage] added the component
