A new ExecutionContext is now created everytime that GraphWalker::walkConstraint() is
launched. Because of this, a validator B launched from within a validator A can't break
A anymore by changing the context.
Because we have a new ExecutionContext for every constraint validation, there is no point
in modifying its state anymore. Because of this it is now immutable.
Commits
-------
92f820a Renamed registerConstraints to loadDynamicValidatorMetadata
dd12ff8 CS fix, getConstraints renamed
09c1911 [Validator] Improved dynamic constraints
54cb6e4 [Validator] Added dynamic constraints
Discussion
----------
[Validator] Dynamic constraints
Bug fix: no
Feature addition: yes
Backwards compatibility break: no
Symfony2 tests pass: yes
By now the Validator component is based on a per-class configuration of
constraints, but in some cases it might be neccessary to add new constraints
dynamically at runtime.
This pull request adds a "ConstraintProviderInterface" to the Validator component. If an object is validated that implements this interface the method "getConstraints" is used to add dynamic constraints:
class User implements ConstraintProviderInterface
{
protected $isPremium;
protected $paymentInformation;
public function getConstraints(ClassMetadata $metadata)
{
if ($this->isPremium) {
$metadata->addPropertyConstraint('paymentInformation', new NotBlank());
}
}
}
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by alexandresalome at 2012-01-15T11:20:04Z
Related to #1151
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by canni at 2012-01-16T09:22:28Z
👍
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by bschussek at 2012-01-16T12:32:44Z
I think this is a good addition. I think we still have a naming problem though. When constraints are loaded using a static method, the default name for the loader method is `loadValidatorMetadata`. Since the method for dynamic constraint loading is basically the same, I think the two names should be related.
Solution (1): Rename the method in your interface to `loadDynamicValidatorMetadata`. Ugly and long.
class MyClass implements ConstraintProviderInterface
{
public static loadValidatorMetadata(ClassMetadata $metadata) ...
public loadDynamicValidatorMetadata(ClassMetadata $metadata) ...
}
Solution (2): Rename the default method name in `StaticMethodLoader` to `registerConstraints` and adjust the docs. Breaks BC.
class MyClass implements ConstraintProviderInterface
{
public static registerConstraints(ClassMetadata $metadata) ...
public registerDynamicConstraints(ClassMetadata $metadata) ...
}
@fabpot: Are we allowed to break BC here? If not, we should probably stick to (1).
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by fabpot at 2012-01-16T12:36:14Z
I would prefer to not break BC if possible.
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by blogsh at 2012-01-16T15:25:46Z
So "loadDynamicValidatorMetadata" would be the best solution?
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by althaus at 2012-01-17T13:39:19Z
>So "loadDynamicValidatorMetadata" would be the best solution?
Sounds fine for me based on @bschussek's comment.
