Support for Validation of Indexed Properties
--------------------------------------------
Key: WW-2656
URL: https://issues.apache.org/struts/browse/WW-2656
Project: Struts 2
Issue Type: Improvement
Components: Core Interceptors
Affects Versions: 2.0.11
Reporter: Bob Tiernay
Currently, there doesn't seem to be a method of validating an indexed property
(ie. a collection) directly or indirecetly within an action.
For instance, given an action OrderAction with a property order of type Order
where order contains a collection trades of type Trade, the following is not
possible:
@Validation
public class OrderAction {
private Order order = new Order();
@Validations(
requiredFields = {
@RequiredFieldValidator(message = "", key =
"errors.required", fieldName = "order.trades[].field1"),
@RequiredFieldValidator(message = "", key =
"errors.required", fieldName = "order.trades[].field2"),
}
)
public String execute() throws Exception {
....
}
The closest thing to support for something like the above is using the
VisitorFieldValidator validator. Although it has the following disadvantages:
1. It must be placed on the target object (invasive and not context sensitive)
2. It does not work with an indirect collection (as in the example above)
Something like this should be possible (even struts1 validator supports
indexedListProperty)
On a related topic, it should be possible to do the following to display the
error in the resulting view:
<s:fielderror><s:param>order.trades[2].field1</s:param></s:fielderror>
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