Just wanna ask is that
1.) the grid would not load & save the JSON data which have not mapped(that is some columns would not display in the grid) to the store?
2.) if this is the case, is it I need to load data to a Jasonstore first, and use that Jasonstore as the store of the grid....whenever I need the data which is not displayed, I'll need to get it from the Jasonstore i/o the grid's store