CODEWITHSUNDEEP
javaspringspring-mvc
AAK
AAK

Reputation: 123

Spring Dynamic List Binding

I have a typical scenario - I have read many articles on this and dynamic addition seems to work fine. I could not get elegant solution for dynamic delete.

  1. A Web Form is simulating a User. User can have name and List of phoneNumbers.

  2. phoneNumbers can be added dynamically using Javascript at client side.

  3. Dynamic addition of phoneNumber into phoneNumbers is not a problem - Thanks to LazyList / AutoPopulatingList.

  4. Dynamic Deletion is kind of an issue. Let's say the web form was rendered with phoneNumbers as {1,3,5,7,9}. Using Javascript the user removes {1,3} without submitting the form. Now when the form is submitted user.phoneNumbers should automatically have {5,7,9}.

Somehow, Spring MVC just doesn't contain the updated list. I am using annotation based controllers.

Gurus any help?

Upvotes: 3

Views: 2422

Answers (2)

blong824
blong824

Reputation: 4030

I am seeing the same thing with Autopopulating list.

I use a dojo ajax call to 1) dojo.destroy the dom with the removed list value, then 2) on the server I do list.remove(index).

The value in the list ends up being null but the index and the size of the list remain the same size (the largest size possible ie: if 4 ajax add calls the list will remain a size of 4 even if one or several remove calls are completed).

Were you able to figure out why this was happening?

Upvotes: 0

Arthur Ronald
Arthur Ronald

Reputation: 33775

I usually do as follows

For each removed PhoneNumber object, i do a Ajax request. A PhoneNumberRepository takes care of deleting the PhoneNumber

@Repository
public class PhoneNumberRepositoryImpl implements PhoneNumberRepository {

    public void removePhoneNumber(PhoneNumber phoneNumber) {
        // code goes here
    }

}

This way, you user will contain only PhoneNumber that has not been removed.

Here you can see how i remove / add collection based property. It works fine!

regards,

Upvotes: 1

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