Hi,
I want to use Grid ForeignKey column to choose objects by id.
The sample is in attachment. I want to make school column and grade column nullable, and I can set the value to null when I edit the row.
How to do this?
If I want to choose school column value by typing characters for filtering, is it possible to do this in Grid ForeignKey column? Or I have to use ClientTemplate to solve this problem?
Because the sample file exceed the maximum size, I removed Telerik js/css files from the sample, please use version 2017.3.913