Calcuate總和NG-重複時價值變化

Question

更改值時，我想Calcualte求和

<tr ng-repeat="act in ctrl.otsact.tests" ng-if="ctrl.editToggle"> 
    <td> 
     <md-input-container> 
      <input type="text" ng-model="act.test_date" class="dateField" aria-label="Test Date"> 
     </md-input-container> 
    </td> 
    <td ng-repeat="sub in act.subjects" > 
     <md-input-container> 
      <input type="number" ng-model="sub.score" aria-label="Score"> 
     </md-input-container> 
    </td> 
    <td class="composite"> 
     100 
    </td> 
    <td><span ng-click="ctrl.removeOTSACT(act.id)"> x </span></td> 
</tr> 

查看

Date of Test English Math Reading Science Writing Composite 
2017-05-29  13  13  13  13  13  65 
2017-05-29  2  2  2  2  2  10 

想calcluate複合加載

Answer 1

您的看法時：

<td class="composite">{{ getSum(act) }}</td> 

Contro米勒：

$scope.getSum = function(act){ 
    var sum = 0; 
    for(var i = 0; i < act.subjects.length; ++i){ 
     var subject = act.subjects[i]; 
     sum += subject.score; 
    } 
    return sum; 
} 

當您使用ngModel指令或使用插值，你的數據是雙向綁定和函數值將在每次更改模型的時間重新計算。

Answer 2

改變這樣

<tr ng-repeat="act in ctrl.otsact.tests" ng-init="act.subjects.total=0" ng- 
if="ctrl.editToggle"> 
<td> 
    <md-input-container> 
     <input type="text" ng-model="act.test_date" class="dateField" aria- 
label="Test Date"> 
    </md-input-container> 
</td> 
<td ng-repeat="sub in act.subjects" > 
    <md-input-container> 
     <input type="number" ng-model="sub.score" 
ng-init="act.subjects.total=act.subjects.total+sub.score" aria-label="Score"> 
    </md-input-container> 
</td> 
<td class="composite"> 
    {{act.subjects.total}} 
</td> 
<td><span ng-click="ctrl.removeOTSACT(act.id)"> x </span></td> 
</tr> 

Answer 3

您的看法試試這個：

<td class="composite">{{act.subjects | map:'score' | sum}}</td>