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[英]request-promise - How can I get the result from a Promise outside of the function?
[英]How to get result data in Angular promise request?
我正在研究Angular,我的代碼有問題。 我試圖通過使用Promise和Service創建一個Ajax請求。 我在ajax訪問中的輸出成功,但是無法在視圖中顯示。
這是我的一些代碼:
<div ng-app="promiseCall">
<div ng-controller="promiseCtrl">
<button tyle="button" class="btn btn-default" ng-click="promiseCallRequest()">Promise Call</button>
<table class="table table-bordered table-hovered">
<thead>
<tr>
<td class="text-center"><label>ID</label></td>
<td class="text-center"><label>TITLE</label></td>
<td class="text-center"><label>BODY</label></td>
<td class="text-center"><label>CREATED AT</label></td>
<td class="text-center"><label>UPDATED AT</label></td>
</tr>
</thead>
<tbody>
<!-- no output -->
<tr ng-repeat="item in noteListing">
<td>{{ item.id }}</td>
<td>{{ item.title }}</td>
<td>{{ item.body }}</td>
<td>{{ item.created_at }}</td>
<td>{{ item.updated_at }}</td>
</tr>
</tbody>
</table>
</div>
</div>
angular.module('promiseCall',[])
.controller('promiseCtrl', function($scope, $log, noteData) {
$scope.promiseCallRequest = function() {
var getPromiseCallData = noteData.getNoteData();
getPromiseCallData.then({
function(payload) {
console.log(payload); //no output :(
//$scope.noteListing = payload.data;
},
function(errorPayload) {
$log.error('Failure request in note', errorPayload);
}
});
}
}).factory('noteData', function($http, $log, $q) {
return {
getNoteData: function() {
var deferred = $q.defer();
$http.get("<?php echo site_url('tutorial/getAjaxData'); ?>")
.success(function(data){
/*
deferred.resolve({
id: data.id,
title: data.title
});
*/
//console.log('success'); -- ok
})
.error(function(msg, code){
deferred.reject(msg);
$log.error(msg, code);
alert('there must be an error!');
});
return deferred.promise;
}
}
});
這是JSON輸出:
{"article_data":[{"id":"1","title":"sample updated 1","body":"sample 1","created_at":"2015-06-15 15:37
:28","updated_at":"2015-06-15 21:38:46"},{"id":"2","title":"sample 2","body":"sample 2","created_at"
:"2015-06-15 15:37:54","updated_at":"2015-06-15 15:37:54"}]}
嘗試刪除{}
在getPromiseCallData.then({});
。
例如
$scope.promiseCallRequest = function() {
var getPromiseCallData = noteData.getNoteData();
getPromiseCallData.then(
function(payload) {
console.log(payload); //no output :(
//$scope.noteListing = payload.data;
},
function(errorPayload) {
$log.error('Failure request in note', errorPayload);
}
);
};
希望能幫助到你。
試試下面的代碼:
....
getPromiseCallData.then(function(payload) {
console.log(payload); //no output :(
//$scope.noteListing = payload.data;
}).catch(function(errorPayload) {
$log.error('Failure request in note', errorPayload);
});
...
getNoteData: function() {
return $http.get("<?php echo site_url('tutorial/getAjaxData'); ?>");
}
在getNoteData
,您所做的是一個承諾反模式,您已經有了一個承諾,無需為其創建另一個包裝。
編輯:
如果您想記錄服務的成功和錯誤,可以簡單地做,您仍然不需要額外的承諾:
getNoteData: function() {
return $http.get("<?php echo site_url('tutorial/getAjaxData'); ?>").then(function(data){
//some log
return data;
}, function(err){
// log err
return err;
});
}
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