PrimeFaces dataTable sorting not working

Question

I am having trouble getting the PrimeFaces dataTable component\'s sort behavior to work as documented. (I am using PrimFaces 4.0, JSF 2.1.12, and Tomcat 7.0.) The problem I

Answer 1

My datatable was not sorting due to the existence of lazy="true". When I removed that, it worked. I realize you are not using that attribute, however.

Answer 2

Your firs string is

<p:dataTable id="dataTable" var="car" value="#{tableBean.cars}">

so tableBean has a method

public List<Car> getCars()
{
    return carEJB.findAll();
}

but your bean has no variable to save method result after sort.

Solution:

public class CarController
{
...
    private List<Car> cars;
...
    privare void reset()
    {
        cars = carEJB.findAll();
    }
...
    public List<Car> getCars()
    {
        return cars;
    }
}

Answer 3

remove the pound and curly bracket like this:

From this:

<p:column sortBy="#{car.manufacturer}">

To this

<p:column sortBy="manufacturer">

I had the same problem and it was simply because of that.