Patrice DUROUX created WW-5126:
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Summary: inconsistancy between Model Driven and Model Driven
Interceptor documentations
Key: WW-5126
URL: https://issues.apache.org/jira/browse/WW-5126
Project: Struts 2
Issue Type: Improvement
Reporter: Patrice DUROUX
Hi,
The Model Driven documentation says:
If an action class implements the interface
{{com.opensymphony.xwork2.ModelDriven}} then it needs to return an object from
the {{getModel()}} method. Struts will then populate the fields of this object
with the request parameters, and *this object will be placed on top of the
stack once the action is executed*. Validation will also be performed on this
model object, instead of the action. Please read about [VisitorFieldValidator
Annotation|https://github.com/apache/struts-site/blob/master/source/core-developers/visitor-field-validator-annotation.html]
which can help you validate model's fields.
where as the Model Driven Interceptor documentation says:
h2. Parameters
* {{refreshModelBeforeResult}} - *set to true if you want the model to be
refreshed on the value stack after action execution and before result
execution*. The setting is useful if you want to change the model instance
during the action execution phase, like when loading it from the data layer.
This will result in {{getModel()}} being called at least twice.
Looking into the code shows that the default parameter value is false.
Moreover the interceptor refresh process is based on call to the {{equals}}
method and this method may have been redefined, in a JPA context for instance.
The replacement is then not systematic and may not be done.
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