[英]Service call in for loop angular js $q, promise
Service call in for loop angular js $q, promise 服务调用for循环angular js $ q,promise
var FULLWEEKDAYS = [MONDAY, TUESDAY ... SATURDAY]
for (var i=0; i< FULLWEEKDAYS.length; i++) {
var reqParams = {
weekday: FULLWEEKDAYS[i],
teacherId : 97
}
TimetableService.getTeachersOccupancy(reqParams, function (data)
{
if (data) {
$scope.weeklyData.push(data);
}
}, function (err) {
//message.error('Timetable', err.data);
});
}
Serivice call is 服务电话是
function getTeachersOccupancy(data, successFunction, errorFunction) {
var params = $.param(data);
AjaxHandlerFactory.AjaxGet(BASETIMETABLEPATH + 'occupancy?' +
params, {}, function (response) {
successFunction(response.data);
}, function (error) {
errorFunction(error);
});
}
Question: $scope.weeklyData.length = 0
outside for loop. 问题:
$scope.weeklyData.length = 0
外的循环。 Why and how to handle this in promises? 为什么以及如何在诺言中处理这一问题?
Serivce call 私人电话
function getTeachersOccupancy(data, successFunction, errorFunction) {
// /SchoolAdminWS/services/schools/{schoolCd}/timeTable/occupancy?classroomId={classroomId}&date={YYYY-MM-DD}
var params = $.param(data);
***var deferred = $q.defer();***
AjaxHandlerFactory.AjaxGet(BASETIMETABLEPATH + 'occupancy?' + params, {}, function (response) {
successFunction(response.data);
***deferred.resolve(response.data);***
}, function (error) {
errorFunction(error);
***deferred.reject(error);***
});
***return deferred.promise;***
}
While calling above service, create a variable promise=[]; 在调用上述服务时,创建一个变量promise = [];。 push all repsonses from service call, and resolve them.
推送服务呼叫中的所有回复,并加以解决。
var promises = [];
for (var i=0; i< FULLWEEKDAYS.length; i++) {
var reqParams = {
weekday: FULLWEEKDAYS[i],
teacherId : vm.employeeProfileId
}
var promise = TimetableService.getTeachersOccupancy(reqParams, function () {}, function () {});
promises.push(promise);
}
Now resolve using $q.all() 现在使用$ q.all()解决
$q.all(promises).then(function(value) {
vm.weeklyData = value;
console.log(vm.weeklyData);
setTeacherOccupancyData(value);
vm.isSearch = true;
}, function (reason) {
console.log("Promise Rejected:" + reason);
});
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