AngularJS : ng-repeat filter when value is greater than

Question

我有一个简单的 ng-repeat 会抛出数据，它显示的字段之一是 NumberOfStamps:

<tr ng-repeat-start="list in Data.Items ">
   <td><a href=" {[{list.Title}]} {[{list.ForeName}]} {[{list.SurName}]}</a></td>
   <td>(Date of Birth {[{list.Dob}]})</td>
   <td>{[{list.NumberOfStamps}]}  stamps</td>
</tr>

示例输出:

Mr Adam Happy  Date of Birth 01/6/1984     16 stamps
Mr Adam Sad    Date of Birth 24/11/1975    0 stamps
Mr Adam Green  Date of Birth 02/1/1963     1 stamps
Mr Adam Red    Date of Birth 21/1/1951     12 stamps
Mr Adam Blue   Date of Birth 28/10/1998    0 stamps
Mr Adam Brown  Date of Birth 25/9/2010     0 stamps
Mr Adam Black  Date of Birth 24/8/1954     21 stamps
Mr Adam Violet Date of Birth 17/5/1942     54 stamps

如何修改此 ng-repeat 以仅显示 NumberOfStams > 0 的记录？我试过:

<tr ng-repeat-start="list in Data.Items | filter:{NumberOfStamps > 0}">
   <td><a href=" {[{list.Title}]} {[{list.ForeName}]} {[{list.SurName}]}</a></td>
   <td>(Date of Birth {[{list.Dob}]})</td>
   <td>{[{list.NumberOfStamps}]}  stamps</td>
</tr>

预期输出:

Mr Adam Happy  Date of Birth 01/6/1984     16 stamps
Mr Adam Green  Date of Birth 02/1/1963     1 stamps
Mr Adam Red    Date of Birth 21/1/1951     12 stamps
Mr Adam Black  Date of Birth 24/8/1954     21 stamps
Mr Adam Violet Date of Birth 17/5/1942     54 stamps

Answer 1

在相关范围上创建谓词函数:

$scope.greaterThan = function(prop, val){
    return function(item){
      return item[prop] > val;
    }
}

作为第一个参数，它采用对象的属性名称。第二个参数是一个整数值。

在您的 View 中像这样使用它:

<tr ng-repeat-start="list in Data.Items | filter: greaterThan('NumberOfStamps', 0)">

Demo