Hi,
I noticed that when you create a DataGrid using your preferred IDE, there is not mandatory to setup an idattribute :
`
<dataGrid id="ordersDataGrid"
datasource="ordersDs"
width="100%">
<columns>
<column property="date"/>
<column property="customer"/>
<column property="amount"/>
<column property="description"/>
</columns>
</dataGrid>
`
like shows https://demo.cuba-platform.com/sampler/#! >> DataGrid basic settings.
…but if you do not specify an id attribute, and you go back to studio and open the layout of that XML, it will fail with message :
[15:37:52.959] Validation error
java.lang.reflect.InvocationTargetException