13

我想显示附件部分的表格格式。我有查找和结果数据。两者都有一个共同的列attachmentTypeId。我想根据 id 显示附件类别描述。在ng-bind我尝试过的尝试中，它没有用。

我在 中使用一个函数ng-bind，希望该方法是错误的，期待该方法的替代方法。

attachmentLookup包含attachmentDesc, _attachmentTypeId

  $scope.attachmentLookup = [{
    "attachmentDesc": "Category One",
    "attachmentTypeId": "1"
  }, {
    "attachmentDesc": "Category Two",
    "attachmentTypeId": "2"
  }, {
    "attachmentDesc": "Category Three",
    "attachmentTypeId": "3"
  }, {
    "attachmentDesc": "Category Four",
    "attachmentTypeId": "4"
  }, {
    "attachmentDesc": "Category Five",
    "attachmentTypeId": "5"
  }];

attachmentDetails来自数据库的数据为，

  $scope.attachmentDetails = [{
    "attachmentId": "001",
    "fileName": "File Name 001",
    "attachmentTypeId": "1"
  }, {
    "attachmentId": "003",
    "fileName": "File Name 003",
    "attachmentTypeId": "2"
  }, {
    "attachmentId": "005",
    "fileName": "File Name 005",
    "attachmentTypeId": "3"
  }, {
    "attachmentId": "007",
    "fileName": "File Name 007",
    "attachmentTypeId": "1"
  }, {
    "attachmentId": "009",
    "fileName": "File Name 009",
    "attachmentTypeId": "2"
  }, {
    "attachmentId": "011",
    "fileName": "File Name 011",
    "attachmentTypeId": "3"
  }];

HTML代码为，

<table>
  <thead>
    <tr>
      <th>File Name</th>
      <th>|</th>
      <th>Category</th>
    </tr>
  </thead>
  <tbody>
    <tr ng-repeat="attachment in attachmentDetails">
      <td> <span ng-bind="attachment.fileName"></span>
      </td>
      <td>|</td>
      <td> <span ng-bind="getCatgoryName(attachment.attachmentTypeId)"></span>
      </td>
    </tr>
  </tbody>
</table>

getCatgoryName来自控制器的代码是，

$scope.getCatgoryName = function (attachmentTypeId) {
    angular.forEach($scope.attachmentLookup, function (attachemnt) {
        if (attachemnt.attachmentTypeId === attachmentTypeId)
            return attachemnt.attachmentDesc;
    });
};

Plunker 示例：http: //plnkr.co/edit/dZy5gW4q9CxWF2NszXYc

4

2 回答 2

11

括号经过脏检查，因此将为每个$digest.

这ng-bind是一个指令，它将对传递给的内容使用观察器ng-bind。

因此，ng-bind仅在传递的变量或值确实发生变化时才适用。

使用函数，您不会传递变量，因此它不会为每个$digest.

因此，最好在函数调用中使用括号。

我在这里更新了 plunker：http://plnkr.co/edit/LHC2IZ0Qk9LOOYsjrjaf?p= preview

我在这里更改了 HTML：

<tr ng-repeat="a in attachmentDetails">
    <td> <span>{{a.fileName}}</span></td>
    <td>|</td>
    <td> {{ getCatgoryName(a.attachmentTypeId) }}</td>
</tr>

该功能也进行了修改：

  $scope.getCatgoryName = function(attachmentTypeId) {
    var desc = "";
    angular.forEach($scope.attachmentLookup, function(attachemnt) {
      if (parseInt(attachemnt.attachmentTypeId) == attachmentTypeId)
        desc = attachemnt.attachmentDesc;
    });

    return desc;
  };
于 2015-05-25T12:04:32.437 回答
1

做同样事情的另一种方法如下：

<tr ng-repeat="delivery in deliveries">
<td>{{delivery.pickup}}</td>
<td>{{delivery.destination}}</td>
<td>{{getVehicleDescription(delivery) || (delivery.isVehicleDescription ? delivery.modelType : delivery.vehicleType)}}</td></tr>

控制器功能也进行了这样的修改：

$scope.getVehicleDescription = function(delivery){
        $scope.roads.map(function(road){
            if(road.modelTypeID == delivery.vehicleType && !delivery.isVehicleDescription){
                delivery.modelType = road.modelType;
                delivery.isVehicleDescription = true;
            }
        })
    };
于 2016-09-21T08:24:29.430 回答