使用到的对象：
$scope.student = {
address: {
select: {
code: "0",
name: "Select proof of address"
},
letter: {
code: "1",
name: "Letter"
},
photograph: {
code: "3",
name: "Photograph"
}
},
------------------------------------
$scope.studentAddressFields = [
"select",
"letter",
"photograph"
]要求：根据 选择的 studentAddressFields的项自动匹配到student 名称。
方法1：最直接的方法
<select ng-model="current.addressCode">
<option ng-repeat="field in studentAddressFields"
value="student.address[field]['code']">
{{student.address[field]['name']}}
</option>
</select>方法2：使用filter
页面代码：
<select ng-model="current.addressCode" ng-options="code as details.name
for (code, details) in student.address | getOrdered">
</select>
Filter JS代码：
myApp.filter('getOrdered', function() {
return function(input) {
var ordered = {};
for (var key in input){
ordered[input[key]["code"]] = input[key];
}
return ordered;
};
});
