Wrong setter is called when row is selected - jsf

Question

I got the following problem using Primefaces 5.2 and JSF 2.1
I got a p:dataTable, and when the user selects a row, the selected object's data should be shown below the table. One requirement is that there should be a checkbox below the table, which should be editable. If the user toggles the checkbox and selects a different entry in the table, the checkbox' new value should be saved. (see the code below)
But I observed the following behaviour. When I select object1, check its checkbox and then select object2, object2's setter will be called, not object1's. Thus object2.someValue will be changed, while object1.someValue won't be. any idea?
<p:dataTable var="myVar" selectionMode="single"
id="myTable" selection="#{form.myValue}"
rowKey="#{myVar.id}"
value="#{form.myTableData}">
<!-- columns here -->
<p:ajax event="rowSelect" process="my_booleancheckbox" update="wrapper">
<p:dataTable>
<h:panelGroup id="wrapper">
<p:booleanCheckbox value="#{form.myValue.someValue}" id="my_booleancheckbox"/>
<!--other stuff here -->
</h:panelGroup>

Answer 1

That's how it is supposed to work, the rowSelect event is fired after the property selection of your p:dataTable is updated
move your ajax action to the p:booleanCheckbox
<p:dataTable var="myVar" selectionMode="single"
id="myTable" selection="#{form.myValue}"
rowKey="#{myVar.id}"
value="#{form.myTableData}">
<!-- columns here -->
<p:dataTable>
<h:panelGroup id="wrapper">
<p:booleanCheckbox value="#{form.myValue.someValue}" id="my_booleancheckbox">
<p:ajax process="my_booleancheckbox" update="wrapper">
</p:booleanCheckbox>
<!--other stuff here -->
</h:panelGroup>