javascript - Undefined variable $http request -


i'm performing - request on end retrieve json - data. want store part of data in variable because want use after request. everytime, variable undefined while did same thing in controller. can tell me i'm doing wrong?

this code:

 var itemnumber;  $http.get(urltoserver + 'serialnumber/' + $stateparams.serialnumber + '/?format=json').success(function(dataserialnumber){       itemnumber = dataserialnumber.id;     }).error(function(){       //code     });      console.log(itemnumber);     item.number = itemnumber;

edit post call:

var postpromise = $http.post(urltoserver + 'problem/', item);    postpromise.success(function (response) {     angular.extend(item, response);     showissuereportedalert($mddialog);       $http.get('assets/settings/general.json').success(function(data){       companyurl = data[0].url;        $timeout(function(){         //$window.location.href = companyurl;       }, 3000);     });            });    postpromise.error(function(){     showerroralert($mddialog);      $scope.rendersendbutton = true;     $scope.showprogresscircular = false;   });

you can put post $http call inside function , call in .success of get. 

 var itemnumber;  $http.get(urltoserver + 'serialnumber/' + $stateparams.serialnumber + '/?format=json').success(function(dataserialnumber){       itemnumber = dataserialnumber.id;         console.log(itemnumber);        item.number = itemnumber;         dopostcallnow(); //calling post      }).error(function(){       //code     });  function dopostcallnow(){     var postpromise = $http.post(urltoserver + 'problem/', item);      //and rest of code... }

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