所以我在 AngularJS 应用程序上实现 Angular Material Design md-autocomplete 指令。我想向控件发送一个承诺,所以如果查询没有完全加载,它不会抛出错误;并且还可以将控件中的加载栏视为“加载”的信号。
这是数据未完成加载时出现的错误:
TypeError:无法读取未定义的属性“切片”
这就是我获取数据的方式:
$http({
method: 'GET',
url: $rootScope.apiURL+'getAllCustomers/'+session,
headers: {'Content-Type': 'application/x-www-form-urlencoded'}
}).success(function(response){
if(response.ErrorMessage === null && response.Result !== null){
mixpanel.track("Customers loaded for POS");
self.customers = Object.keys(response.Result).map(function (key) {return response.Result[key]});
}
})
.error(function(data){
alert('Something went wrong. Please try again.');
mixpanel.track("Error loading customers");
});
这是我的html:
<md-autocomplete
ng-disabled="ctrl.isDisabled"
md-no-cache="ctrl.noCache"
md-selected-item="ctrl.selectedItem"
md-search-text-change="ctrl.searchTextChange(ctrl.searchText)"
md-search-text="ctrl.searchText"
md-selected-item-change="ctrl.selectedItemChange(item)"
md-items="item in ctrl.querySearch(ctrl.searchText)"
md-item-text="item.Name"
md-min-length="0"
placeholder="Buscar Cliente">
<md-item-template>
<span md-highlight-text="ctrl.searchText" md-highlight-flags="^i">{{item.Name}}</span>
</md-item-template>
<md-not-found>
No states matching "{{ctrl.searchText}}" were found.
<a ng-click="ctrl.newCustomer(ctrl.searchText)">Create a new one!</a>
</md-not-found>
</md-autocomplete>
这些是处理查询的函数:
function querySearch (query) {
var results = query ? self.customers.filter( createFilterFor(query) ) : self.customers.slice(0, 50),
deferred;
return results;
}
function createFilterFor(query) {
var lowercaseQuery = angular.lowercase(query);
return function filterFn(customer) {
return (customer.Name.toLowerCase().indexOf(lowercaseQuery) === 0);
};
}
谢谢!