Filter items by | unique:'Category'

Question

Hi,

 

I am getting this error when i am trying to include

 

<select ng-model="tab" ng-repeat="uni in tabs | unique:'Category'"> </select>

 

Error:

 

[$injector:unpr] Unknown provider: uniqueFilterProvider <- uniqueFilter http://errors.angularjs.org/1.6.5/$injector/unpr?p0=uniqueFilterProvider%20%3C-%20uniqueFilter

 

Please help.

Thanks.