javascript - Grouping ng-grid by non-displayed column -

Let's say I have a pattern of patterns

  {name: .. Age: ... Department: ...}  

and I want to show them on the NG-Grid, but I only want a column for name and Age

  columnDefs: [{Field: 'name' ...}, {field: 'age' ...}  

But I want to group them in the department , without department columns.

I have tried to add only one groups: ['dept'] to my grid options, but this does not work - without the group grid

Many people also use gridOptions.groupBy to me, but when I try

  $ scope GridOptions = ... $ Scope.gridOptions.groupBy ('dept')  

I do not have a (expected) undefined function error I can not understand How are the examples of people Program do when Grid Options is just a plain old object

So my question is: Is it possible to set up my NG-grid with my non-display columns? I've got a hack around my problem, I've defined the 'group' column normally. , But I have set width , minWidth , and maxWidth to 0. Also, I'm false from recalculable .