If vm.agentCommission is 0 then I want the field to be blank, so the user dont have to remove the zero before typing.  
I tried this:
 <input ng-model="vm.agentCommission ? '' : vm.agentCommission" ....
But I get this:
Expression 'vm.agentCommission ? '' : vm.agentCommission' is non-assignable.
Is there a way to do this in angular?
 
    