Ng-if to show and hide td data - angularjs

Question

Attached is my code, tried showing td data when the condtion of ng-if is true
<tbody>
<tr ng-repeat="fellow in fellowships">
<td>{{$index}}</td>
<td>{{fellow.Fellowship_Name}}</td>
<div ng-repeat="value in data_report"
ng-if="(fellow.F_Id==value.fellowship_id)? (show_row = true) : (show_row=false)">
<td ng-show="show_row">{{value.Completed}}</td>
<td ng-hide="show_row">0</td>
<td ng-show="show_row">{{value.Not_Updated}}</td>
<td ng-hide="show_row">0</td>
<td ng-show="show_row">{{value.Total_schedule}}</td>
<td ng-hide="show_row">0</td>
</div>
</tr>
</tbody>
Its just giving 0 as result. Though data_report is having values
Tried adding span in td with conditions in td and result in span.
still the result is zero
May I know where the logic is going wrong and how it can be achieved?
Changed the code to
<tbody>
<tr ng-repeat="fellow in fellowships">
<td>{{$index}}</td>
<td>{{fellow.Fellowship_Name}}</td>
<td>
<span ng-repeat="value in data_report" ng-show ="fellow.F_Id==value.fellowship_id">{{value.Completed}}</span>
</td>
<td>
<span ng-repeat="value in data_report" ng-show="fellow.F_Id==value.fellowship_id">{{value.Not_Updated}}</span>
</td>
<td>
<span ng-repeat="value in data_report" ng-show="fellow.F_Id==value.fellowship_id">{{value.Total_schedule}}</span>
</td>
</tr>
</tbody>
Here i am getting values but how can i set default value to zero if there are no values present?

Answer 1

In your case ng-if returns no boolean
The usage is (DOCs):
<ANY
ng-if="expression">
...
</ANY>
I think you dont need ng-if at all. You can write something like:
<tbody>
<tr ng-repeat="fellow in fellowships">
<td>{{$index}}</td>
<td>{{fellow.Fellowship_Name}}</td>
<div ng-repeat="value in data_report">
<td>{{(fellow.F_Id==value.fellowship_id) ? value.Completed: 0}}</td>
<td>{{(fellow.F_Id==value.fellowship_id) ? value.Not_Updated: 0}}</td>
<td>{{(fellow.F_Id==value.fellowship_id) ? value.Total_schedule: 0}}</td>
</div>
</tr>
</tbody>
Its not best solution, in Javascript you can set for example value.Completed to be by default 0. It will help you to simplify your HTML