Question

I have a PrimeFaces <p:dataGrid> component that contains a variable number of panels. Each panel contains a number of derived components. I have a delete button contained inside each of these panels to allow for deletion. I also have an add button outside of the dataGrid. Instead of using immediate="true" on the buttons, I figured out how to set the required attribute of each component in each panel.

For instance:

required="#{empty param['vehicleGrid:0:btnDelete'] and empty param['btnAdd']}". 

For every delete button in the dataGrid and the add button, ignore component validation.

This works if there is a panel inside of the dataGrid, but it only references the first one. I need to dynamically check every panel. Maybe instead of looking at it from the markup page, maybe I need to look at it in Java terms since param is a Map<String, String>.

Answer 1

Bind the delete button component to the view and use UIComponent#getClientId() instead.

<h:inputText ... required="#{empty param[deleteButton.clientId]}" />
...
<h:commandButton binding="#{deleteButton}" ... />

This way the proper client ID will be looked up in the parameter map and there’s then no need to iterate over the parameter map.