CODEWITHSUNDEEP
jsfprimefaces
user1281029
user1281029

Reputation: 1533

DataModel must implement org.primefaces.model.SelectableDataModel when selection is enabled

I was trying to implement one DataTable Editable with RowSelection enabled.

But it is throwing out an exception:

DataModel must implement org.primefaces.model.SelectableDataModel when selection is enabled.

I implemented the DataModel in both the object class and the managed bean class but the error is the same. Now only a blank table appears for me. Please help.

Upvotes: 24

Views: 50092

Answers (6)

ManuJ.Cordoba
ManuJ.Cordoba

Reputation: 11

Possibly the error is because the row.id is empty or null in my case the solution be change this: 

rowKey="row.id"

to this:

rowKey="row"

And the Object of datatable, for example

List<Row> collectionOfDataTable = new ArrayList<>();

Row (Object) implements Serializable:

public class Row implements Serializable{...}

Upvotes: 0

Nublodeveloper
Nublodeveloper

Reputation: 1311

You can get this error if you try to add a new item to the underlying list and forget to assign a value to the new item's rowKey (the rowKey is null).

Upvotes: 22

J Slick
J Slick

Reputation: 939

Don't forget to surround the rowKey value within EL syntax.

rowKey="row.id"

will fail but 

rowKey="#{row.id}"

will succeed.

Upvotes: 0

RajdeepS
RajdeepS

Reputation: 31

In addition to the Solutions given by rags, I would like to mention that if the row key is "NULL" or if your entire List is "NULL" you may get the same error, even if you have completed all the above mentioned steps. If you want to show 0 row, return a list with 0 items. Don't return null for the list.

Upvotes: 3

rags
rags

Reputation: 2590

There are two solutions for this problem:

  1. Adding rowKey, selection and selectionMode attributes to dataTable
  2. Implementing SelectableDataModel interface and extending a DataModel like ListDataModel for filling the dataTable

First one is Simpler. Adding rowKey="#{myEntity.carID}" to your p:dataTable should solve your problem

Upvotes: 41

Matt Handy
Matt Handy

Reputation: 30025

The error message indicates that your DataModel does not implement the SelectableDataModel interfaces. It needs to be a separate class. This is an example from the PF showcase how the data table definition needs to be done:

import org.primefaces.model.SelectableDataModel;  

public class CarDataModel extends ListDataModel<Car> implements SelectableDataModel<Car> {    
   ...
}

Upvotes: 2

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