How to set the name parameter on a multiple s:select

Question

Dear all,Imagine you have the following scenario:

- a property in your action: private Entity entity;
- Entity has a List entity2List
- Entity2 has a Entity3 entity3

Now, you need an s:select with multiple="true" to populate entity3. This corresponds to having a request in the form entity.entity2List[n].entity3.id (n=0,1,2...depending on how many items are selected).

Question: how should the name parameter of the s:select be like to achieve this?

I have tried the following without success (meaning entity.entity2List has is empty):

<s:select multiple="true" name="%{entity.entity2List[].entity3.id}" list="#someList" listKey="id" listValue="code"/>
<s:select multiple="true" name="entity.entity2List[].entity3.id" list="#someList" listKey="id" listValue="code"/>

Answer 1

I would have a setter on my action class that takes an array of ids. Then the action does the appropriate lookups, and sets the hydrated objects on the appropriate models.
You do recognize that the data you provided is ambiguous, though, right? Nothing you stated is sufficient to know *which* entity2 objects should be set on entity, just which entity3 objects you want those entity2 objects to have. In fact, if you don't happen to get a number of entity3 ids that matches the number of entity2s on entity, you've left yourself no way of knowing how to proceed. (Remember, all you get is a (potentially unordered) list of ids from the form submission, not tuples.)