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Vaadin Forum3. Vaadin 6, 7, 8Framework UI

column sort only on first out of 8 columns?

Tudor Raneti
1 decade ago Jan 18, 2010 9:22pm

I'm displaying some data from a mysql database using Hibernate, and setting as the table's datasource a subclass of BeanItemContainer. The problem is that only the first incoming column from the database gets the sort functionality when i click on the header. I'm attaching the code below.

What are the prerequisites for a table to be able to sort each column? What is causing this?

Last updated on Jan, 18th 2010
Artur Signell
1 decade ago Jan 19, 2010 6:20am

If I remember correctly BeanItemContainer allows sorting of all properties with a type that is assignable to Comparable. So if you are using "int" in your bean you might consider using Integer instead to make integer fields sortable.

If you want to override the behavior you need to override BeanItemContainer.getSortableContainerPropertyIds() to return more than the properties that are assignable from Comparable.

Additionally you need to use another itemSorter for the container. The DefaultItemSorter uses DefaultPropertyValueComparator, which assumes all propertys are assignable to Comparable.

Last updated on Jan, 19th 2010
Tudor Raneti
1 decade ago Jan 22, 2010 3:44am

Ok, how do i stop sort for a single column now? :grin: It's a Date and it doesn't fall out of the Comparable cathegory no matter what i do.

Bruno Pinto
1 decade ago Jan 22, 2010 5:00am

What kind of Date are you using?

java.util.Date is comparable for instance.

Tudor Raneti
1 decade ago Jan 27, 2010 10:33am

The Date column was the only one sorting, that has been answered, now they all sort. Now i want to stop sorting exactly for the Date column because it's dd/mm/yyyy and it doesn't sort properly until i get some work done.

In other words, i need an in-Comparable Date:grin: ...or an off switch for that column.

P.S. Guess i'll have to fiddle with the comparator.

Last updated on Apr, 20th 2010