javascript - 使用 AngularJs 扩展表格中的中间行

Question

我正在创建一个支付门户，用户可以在其中为 paymentMethod 和 numberOfIntallments 创建 paymentPlan 。 paymentPlan 显示在带有 ng-repeat 的表格中。 numberOfIntallments 最多可达 36，我不希望用户看到有关所有分期付款的详细信息。

我想要做什么:

如果numberOfIntallments < 7，则显示所有分期付款。
如果 numberOfIntallments >= 7 显示前 2 个分期 和后 2 个，并在表格中间创建一个按钮来 showAll 分期付款。

我该如何解决这个问题？

当前代码:

<tr ng-repeat="model in paymentPlan.installments">
    <td>{{model.dueDate | date: 'shortDate'}}</td>
    <td>{{model.principal | currency:undefined:0}}</td>
    <td ng-show="numberOfInstallments > 1">{{model.contractInterest | currency:undefined:0}}</td>
    <td ng-show="numberOfInstallments > 1">{{model.lendingFee | currency:undefined:0}}</td>
    <td ng-show="paymentMethod == 0">{{model.noticeAndPaymentFee | currency:undefined:0}}</td>
    <td>{{model.installmentFee | currency:undefined:0}}</td>
    <td>{{model.total | currency:undefined:0}}</td>
</tr>

Answer 1

您需要在 Controller 中进行一些计算并将结果放入范围中。然后您可以调整 ng-repeat 以获得您想要的结果。

Controller :

$scope.ShowMiddleRows = false;

if ($scope.numberOfInstallments >= 7) {
    // Add the first two installments into PrefixRows[] array
    for (i=0; i < 2; i++) {
        $scope.PrefixRows.push($scope.paymentPlan.installments[i]);
    }
    // Add the lasttwo installments into SuffixRows[] array
    for (i=$scope.paymentPlan.installments-2; i < scope.paymentPlan.installments; i++) {
        $scope.SuffixRows.push($scope.paymentPlan.installments[i]);
    }
    // Add the remaining middle rows into MiddleRows[] array
    for (i=2; i < $scope.paymentPlan.installments-2; i++) {
        $scope.MiddleRows.push($scope.paymentPlan.installments[i]);
    }
}

HTML:

<!-- this <tbody> will only show if numberOfInstallments >= 7 -->
<tbody ng-if="numberOfInstallments >= 7">

    <!-- 2 PREFIX ROWS -->
    <tr ng-repeat="model in PrefixRows">
        <td> ... </td>
    </tr>

    <!-- MIDDLE ROWS or a button -->
    <!-- ShowMiddleRows is a scope variable which is true or false depending on button click. Setting it to true will show the middle rows -->
    <tr ng-show="!ShowMiddleRows">
        <td colspan="10"><button ng-click="ShowMiddleRows = !ShowMiddleRows">Show All Installments</button></td>
    </tr>
    <tr ng-repeat="model in MiddleRows" ng-show="ShowMiddleRows">
        <td> ... </td>
    </tr>
    <!-- 2 SUFFIX ROWS -->
    <tr ng-repeat="model in SuffixRows">
        <td> ... </td>
    </tr>
</tbody>

<!-- this <tbody> will only show if numberOfInstallments < 7 -->
<tbody ng-if="numberOfInstallments < 7">
    <tr ng-repeat="model in paymentPlan.installments">
        <td> ... </td>
    </tr>
</tbody>