详解angular ui-grid之过滤器设置

var app = angular.module('app', ['ui.grid', 'ui.grid.edit']); 
 
app.controller('MainCtrl', ['$scope', '$http', function ($scope, $http) { 
 $scope.gridOptions = { 
  columnDefs: [ 
   { field: 'name' }, 
   { field: 'amount', name: 'Number', cellFilter: 'fractionFilter' }, 
   { field: 'amount', name: 'Currency', cellFilter: 'currencyFilter:this' } 
  ] 
 }; 
  
 $http.get('data.json') 
 .success(function (data) { 
  $scope.gridOptions.data = data; 
 }); 
}]) 
 
.filter('fractionFilter', function () { 
 return function (value) { 
  return value.toFixed(0); 
 }; 
}) 
 
.filter('currencyFilter', function () { 
 var currencyMap = { 
  'dollar': '$', 
  'pound': '£', 
  'euro': '?' 
 }; 
  
 return function (value, scope) { 
  return currencyMap[scope.row.entity.currency] + value.toFixed(2); 
 }; 
})