javascript – 然后Angular $http解析_.each中的多个调用

2019年7月21日 173次阅读

我试图从_.each中的$http中获取多个数据,并在$scope.tasksData中显示组合数据.

但问题是_.each稍后执行并首先返回null,
请指导如何解决此问题.

谢谢

var tasksList, processingStageId;

var apiURL = "http://localhost:9080/caseDetails/" + $stateParams.caseId + "?_=1461046349867";



var stagesList = $http.get(apiURL).then(function(resdata, status, headers, config) {

return resdata;

}).then(function(stagesData) {

stageId = stagesData.data.childStages;
var allTasksData = [];
var self = this;

_.each(stageId, function(item) {
    var stagesApiURL = "http://localhost:9080/stageDetails/" + item.stage.stageId;

    $http.get(stagesApiURL).then(function(taskData, status, headers, config) {
        //_.extend(allTasksData, taskData.data);            
        allTasksData.push(taskData.data);

    });
});

return allTasksData;

}).then(function(allTasksData) {
console.log("Hello");

_.each(allTasksData, function(data) {
    $scope.tasksData.concat(data);
});
});

最佳答案 要在解决所有请求后获取数据,请使用$q.all([prom,prom,prom])

.then(function(stagesData){
    var stageId = stagesData.data.childStages;
    var tasks = [];

    _.each(stageId, function(item){
        var stagesApiURL = "http://localhost:9080/stageDetails/" + item.stage.stageId;
        var req = $http.get(stagesApiURL).then(function(taskData, status, headers, config){            
            return taskData.data;
        });
        tasks.push(req);
    });

    //Merge all promise request. Resolve when all request resolved
    return $q.all(tasks);

})
/**
 * allTasksData - [taskData.data, taskData.data , ...]
 */
.then(function(allTasksData){
  ...
});
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