angularjs - How to get prevent multiple promises from different functions -

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in angular-app, have 3 queries, each depends on others. putting promise() each of them. in case how can $q.all depended promise once done?

can clarify me, please?

here code :

"use strict";  angular.module("tcpapp") .controller("projectsummarycontroller",       ['$scope', '$routeparams', '$location', 'server', 'modalservice', '$q',      function ( $scope, $routeparams, $location, server, modalservice, $q ) {           $scope.projectid = $routeparams.projectid;         $scope.subprojectid = $routeparams.subprojectid;         $scope.phaseid = 0;         $scope.disciplineid = 0;         $scope.contractorid = 0;          $scope.queryconractorinfo = function ( contractorid ) {              server.contractorinfo.get({                  projectid:$scope.projectid,                  subprojectid : $scope.subprojectid,                 contractid : $scope.contractorid,                 disciplineid : $scope.disciplineid,                 staticid : 0 /* @ present static */              }).$promise.then(function ( contractorinfo ) {                  $scope.contractorinfo = contractorinfo;             })         }          $scope.queryconractorlist = function ( phaseid, disciplineid ) {          var base = 'http://azvsptcsdev02:678/_vti_bin/cpmd.webservice/projectinfoservice.svc/contracts/'          console.log( base+$scope.projectid+'/'+$scope.subprojectid+'/'+phaseid+'/'+disciplineid );          server.contractorslist.query(                 {                     projectid:$scope.projectid,                     subprojectid : $scope.subprojectid,                      phaseid : phaseid,                      disciplineid: disciplineid                  }).$promise.then(function ( contractorslist ) {                      $scope.contractorid = contractorslist[0].id; //setting first contractor default;                      $scope.queryconractorinfo( $scope.contractorid );                  });          }          $scope.queryproject = function ( prjid, subprjid ) {              server.projectsummary.get({id:$scope.projectid})              .$promise.then(function (data) {                  //only setting phase id , desciple id list of contractors                  $scope.phaseid = data.phaseids[0].id; //setting first phase default;                 $scope.disciplineid = data.disciplineids[0].id; //setting first descipline default;                  $scope.queryconractorlist( $scope.phaseid, $scope.disciplineid );               });          }          if($scope.projectid) {              $scope.queryproject();          }          $q.all([ $scope.queryproject, $scope.queryconractorlist, $scope.queryconractorinfo ])         .then(function ( data1, data2, data3 ) {              console.log( data1, data2, data3 );// nothing here!          })      }]);

what best practice handle this?


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