How to ajax update an item in the footer of a PrimeFaces dataTable?

Question

This is a visual of the table I have:

+---------+------------+-------------------+
| Header1 |  Header2   | Header3           |
+---------+------------+----------         


        

Answer 1

You can't really update the values of the table from within the table. However, you can use p:remoteCommand to achieve this. Also, I would probably use the cellEdit event on the whole table (instead of a single p:ajax on your pe:inputNumber). The overall result would be:

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Please note that you might need to add partialSubmit="true" to the p:ajax, this way you only submit the component's data. If you like the cellEdit event idea, you need to make the dataTable editable, and add the following in your p:dataTable, and get rid of the p:ajax inside your pe:inputNumber

Good luck!