angular mean.io developer prodution uglify error on minification - angularjs

Question

Can anyone explain me what's wrong with this code:
.controller('ArticleCreateCtrl', ['$scope', '$state', '$filter', 'Articles', function ($scope, $state, $filter, Articles) {
$scope.article = {};
$scope.save = function(){
$scope.article.categories = $filter('strcstoarray')($scope.article.categories);
Articles.store($scope.article).then(
function(data) {
$scope.article = data;
return $state.transitionTo('articles');
},
function(err) {
throw new Error(err);
}
);
};
}])
In the local machine works well when I run it
in heroku (prodution enviroment therefore with all the js minify)
I get :
Error: assignment to undeclared variable data
UPDATE (My service)
angular.module('mean.system')
.factory('Base',['Restangular', function(Restangular) {
return function(route){
var elements = Restangular.all(route);
return {
one : function (id) {
return Restangular.one(route, id).get();
},
all : function () {
return elements.getList();
},
store : function(data) {
return elements.post(data);
},
copy : function(original) {
return Restangular.copy(original);
},
getElements : function() {
return elements;
}
};
};
}]);
//Articles service used for articles REST endpoint
angular.module('mean.articles').factory('Articles', ['Base', function(Base) {
_.mixin({
'findByCategory': function(collection,category) {
return _.filter(collection, function(item) {
return _.contains(item.categories, category);
});
}
});
function Articles() {
this.findByCategory = function(collection,category){
return _.findByCategory(collection,category);
};
}
return angular.extend(Base('articles'), new Articles());
}]);

Answer 1

Make sure you have uglify configured properly in Gruntfile.js, with mangle: false
uglify: {
options: {
mangle: false
},
production: {
files: '<%= assets.js %>'
}
},

Answer 2

I had the same problem, it's because you must use the ngmin task, which prepares some angular libraries to be minified.
At package.json add the following line before uglify:
"grunt-ngmin": "0.0.3"
Then update dependencies:
npm install
Then at the Gruntfile.js added the ngmin task:
ngmin: {
production: {
files: '<%= assets.js %>'
}
},
Remember to add the ngmin task BEFORE uglify:
grunt.registerTask('default', ['clean','cssmin', 'ngmin','uglify', 'concurrent']);
The next time you'll run the server in production mode your code will work.