Paul Speijers created WICKET-6344:
-------------------------------------
Summary: PropertyValidator does not work with dynamic validation
groups
Key: WICKET-6344
URL: https://issues.apache.org/jira/browse/WICKET-6344
Project: Wicket
Issue Type: Bug
Components: wicket-bean-validation
Affects Versions: 7.4.0
Reporter: Paul Speijers
The Wicket property validator does not work with dynamic validation groups
because of the following issues:
# It can not cope with the case in which the Default validation group is
provided explicitly
# The initial validation groups determine whether required should be set on the
component. But the PropertyValidator never unsets the flag.
When using a Wicket property validator you can provide a model for the
validation groups:
```
IModel<Class<?>[]> validationGroups = Model.of(new Class[]{Default.class});
new PropertyValidator<>(validationGroups);
```
Let's say I have the following model object:
```
public class MyObject {
@NotNull
private String name;
@NotNull(groups=AdditionalValidations.class)
private String additional;
}
```
Then the @NotNull constraint on the name attribute is NOT performed when
submitting the form.
This is caused by the fact that no validations are performed within
FormComponent.validateValidators. On the following line both conditions
evaluate to false:
`if (isNull == false || validator instanceof INullAcceptingValidator<?>)`
The trick to perform "required" validations is that the PropertyValidator sets
the component to required within its onConfigure method:
`this.component.setRequired(true);`
However, this is only performed when isRequired() evaluates to true, which is
NOT the case in my example. This is related to issue 1:
When the Default validation group is provided explicitly, isRequired returns
the wrong result.
Issue 2 has to do with the required flag only being set once by the
PropertyValidator:
Given the example model object above. Assume that when I create the form
components I don't set them required explicitly
(formComponent.setRequired(true), but I rather let it up to the
PropertyValidator because I want to describe my validations on one place, the
model object. So, when I initially create the PropertyValidator the
"additional" model object attribute is NOT set to required within
PropertyValidator.onConfigure, because the validation groups don't match. Then
when I would dynamically change the validation groups:
`validationGroups.setObject(new Class[]{Default.class,
AdditionalValidations.class});`
Then subsequently a required/NotNull validation should be performed for the
"additional" attribute when submitting the form. However, it is not performed
because within PropertyValidator.onConfigure it is only set to required once,
and not updated at a later stage.
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