I want to reload a template and the connected Controller without using $routeProvider, because
my Path-structure doesn't fit with .when(...). I want to use $location.path() to read the URL and set the desired action.
But: if the path of the URL changes, the template doesn't automatically update and neither is the controller reloaded.
Is there a way to say something like this?
angular.module('myApp').controller('ctrl').reload()
I would suggest looking into the Angular UI Router written by the same guys who wrote angular. It will let you transition to different states which is what it sounds like you are trying to do.
https://github.com/angular-ui/ui-router
My solution: don't use Routes! Simply update a variable for your template, controllers don't need updates (simply update the data):
angular.module('myApp',[])
.run(['$rootScope', '$location', 'myService', function ($rootScope, $location, myService) {
$rootScope.view = "";
// Some function to read the URL
$rootScope.setRouting = function(){
var p = $location.path().split("/");
// Do things with p[0], p[1], ...
// e.g. if url is /post/123
$rootScope.view = p[0];
myService.setData(p[1]);
}
// Monitor Location changes:
$rootScope.$on('$locationChangeSuccess', function(event) {
$rootScope.setRouting();
});
// And this is useful for calling within template: ng-click="go('...')"
$rootScope.go = function(path){
$location.path(path);
}
}]);
And for the HTML:
<body>
<ng-include src="view + '.html'"></ng-include>
</body>
Related
I have an app which creates several surveys with random survey ids. As the ids are generated in the backend they are set in the controller. I read the documentation on that, however I do not really understand how to set the routeparams in order to always reach the page /survey/:surveryID.
Here is my code so far:
App Config:
...
.when('/survey/:surveyId', {
templateUrl: 'views/survey.html',
controller: 'SurveyCtrl',
controllerAs: 'survey'
})
Controller:
function SurveyCtrl($scope, RequestService, _, $location, $routeParams) {
$scope.go = function () {
$location.path('/#/survey/' + Math.random());
};
}
View with the link to /survey/:surveyId:
<div>
<md-button ng-click="go()">Enter Survey</md-button>
</div>
I know that this is not the right way and it is not even working. Can someone tell me how to dynamically create these params and set them in the controller so I can access the link with a button and then when clicked reach the survey/:surveyId page?
To get your work done,
$location.path('/survey/' + Math.random());
You can use search method to pass params as well,
$location.path('/myURL/').search({param: 'value'});
$location methods are chainable.
this produce :
/myURL/?param=value
You could also use the updateParams method for that:
$route.updateParams({'surveryID': Math.random()});
And access the data using $routeParams.surveryID
I have a main page with a nav, and each nav option takes you to another route. It all looks like a single page app, but each "page" has it's own route and controller.
My problem is that I want to put a search box in the navbar. When someone uses the searchbox, I want to take the user to the "search" route and then display the results. I'm having a lot of trouble figuring out these two issues:
Where do I store this "searchbox" logic? E.g. when someone searches, they choose the type of search from a dropdown, then the search query in the inputbox. I have special logic to automatically choose which dropdown value based on the value typed in the inputbox.
How do I redirect to the
"search" route and display the results based on the input from the
previous page?
It's probably clear I'm a newby to Angular. I'm happy to work out the details, but I'm mainly looking to understand how to structure the solution to this problem. Thanks in advance for your help.
What I love about Angular the most is the amount of options you can apply.
Your goal can be reached either by using a service. A service is a singleton class which you can request from controllers. Being a singleton what ever value you store in the service is available to all controllers. You can than either $watch for value change, use $broadcast to notify data change or use $routeParams to send data with route change.
A service is built as follows :
The following assume you have a global module var named 'app'
app.service('myService', function(){
var myValue;
this.getMyValue = function(){
return myValue;
};
this.setMyValue = function(value){
myValue = value;
};
});
Then you request a service from a controller like you request an angular service such as $scope.
app.controller('myController', ['$scope', 'myServce', function($scope, myService){
$scope.myValue = myService.getMyValue();
//Example watch
$scope.$watch('myValue',function(){
//Search criteria changed!!
}, true);
}]);
Angular is terrific..have fun coding
Basically you would want an own state for your search page, so this is where we begin (I expect you to use the ui-router and not Angulars built in router):
.state('search', {
url: "/search",
templateUrl: "pages/search.html",
controller: 'SearchController as ctrl',
params: { searchString: {} }
})
As you can see, I've defined an additional parameter for the search string that is not part of the URL. Of course, if you like, you could change that and move the parameter to the URL instead:
.state('search', {
url: "/search/:searchString",
templateUrl: "pages/search.html",
controller: 'SearchController as ctrl'
})
The actual search input is pretty straight forward as well, because it's only HTML:
<input type="text" ng-model="searchString" on-key-enter="ctrl.goSearch(searchString)">
The function for the state change has to be placed in the controller for the primary template (e.g. the controller of your navigation bar if the search is located there):
var vm = this;
vm.goSearch = goSearch;
function goSearch(searchString) {
$state.go('main.search', { searchString: searchString });
}
Of interest is also the on-key-enter directive that I've added:
angular.module('your.module')
.directive('onKeyEnter', OnKeyEnter);
function OnKeyEnter() {
return function (scope, element, attrs) {
element.bind("keydown keypress", function (event) {
if(event.which === 13) {
scope.$apply(function (){
scope.$eval(attrs.onKeyEnter);
});
event.preventDefault();
}
});
};
}
On pressing the enter-key, it will call the function you supply as attribute value. Of course you could also use a button with ng-click instead of this directive, but I think it simply looks better.
Last, but not least, you need a Search Controller and a HTML template for your search page, which I won't give to you, as it is up to you what you display here. For the controller, you only need to know how you can access the search string:
angular.module('your.module')
.controller('SearchController', SearchController);
SearchController.$inject = ['$scope', '$stateParams'];
function SearchController($scope, $stateParams) {
$scope.searchString = $stateParams.searchString;
/* DO THE SEARCH LOGIC, e.g. database lookup */
}
Hope this helps to find the proper way. :)
I have a problem with getting updated value between in different page controller, Here is the situation.
page1.html
<body ng-app="app">
<div ng-controller="ctrl1">{{ version }}</div>
</body>
page2.html
<body ng-app="app">
<div ng-controller="ctrl2">{{ version }}</div>
</body>
app.js
var app = angular.module("app", []);
app.run(function($rootScope) {
$rootScope.Data = [];
$rootScope.Data.Version = '1.0.0.1';
});
app.controller('ctrl1', function($scope, $rootScope){
$scope.version = $rootScope.Data.Version;
$rootScope.Data.Version = '1.0.0.2';
});
app.controller('ctrl2', function($scope, $rootScope){
$scope.version = $rootScope.Data.Version;
});
Result
version: 1.0.0.1 // page1.html
version: 1.0.0.1 // page2.html
Expected Result
version: 1.0.0.1 // page1.html
version: 1.0.0.2 // page2.html
How to achieve this kind situation?
I tried using $broadcast from this tutorial for seprate page controllers: fiddle
You can't just reload pages without losing all your data, you know that? Your $rootScope dies, everything dies... :) Your example is completely wrong. Either use SPA routing which doesn't force browser reload or use some type of local storage for keeping the data safe.
Also I have noticed that you are binding to primitives $scope.version = $rootScope.Data.Version; - don't do that, use $scope.data = $rootScope.Data; and then {{data.Version}}. Anyway you should not be using $rootScope at all.
Pass the values between controller use broadcast and on method. please refer the link http://www.dotnet-tricks.com/Tutorial/angularjs/HM0L291214-Understanding-$emit,-$broadcast-and-$on-in-AngularJS.html
You know what I found after using Angular for 2 years now, that using direct variables like $scope.version is not the best for Angular, because they add different watches and in your case you are rewriting instance of 'version'.
Anyway, try to write like that everything what is getting synchronized between different controllers, services, directives, and so on.
var state = {
version: $rootScope.Data.Version,
anyOtherVariable: value
};
$scope.state = state;
In my angular project, when changing the path with $location.path('/foobar') the destination view is displayed but the data aren't reloaded (typically after saving an item and going back to the list, the list is not updated).
I tried to add $route.reload() or $scope.apply(), but nothing change.
I don't know what's wrong or missing to make this work.
UPDATE
$location.url() doesnt' work either
I'm using angular 1.2.26
UPDATE 2 - ANSWER
Ok, after a lot of comments and answers, I think it's time to end this.
I didn't think it would have been a so complicated question.
So, my conclusion, giving all you said is :
Giving simple example of #yvesmancera, the default behavior of the controller is to reload itself
In a complex controller with a resource factory and some REST calls, any save or update action should also manually update the list reference, or trigger a full reload of the list
All of you gave me some good advices, so thank you.
Use $window.location.href. to reload the page. I just check on $location document:
Page reload navigation
The $location service allows you to change only the URL; it does not allow you to reload the page. When you need to change the URL and reload the page or navigate to a different page, please use a lower level API, $window.location.href.
Example:
$window.location.href = "/your/path/here";
I had the same problem just yesterday, if you try to navigate to the same path you're already in, angular won't try to reload the view and controller. What fixed it for me is appending a "/" at the end of each route in $routeProvider, e.g:
$routeProvider
.when('/', {
templateUrl: 'views/home.html',
controller: 'HomeCtrl'
})
.when('/About/', {
templateUrl: 'views/about.html',
controller: 'AboutCtrl'
})
.when('/Contact/', {
templateUrl: 'views/contact.html',
controller: 'ContactCtrl'
})
Edit
Here is a working plunkr with angular 1.2.26
http://plnkr.co/edit/jkGKKCp0djN6Jvy2fIRd?p=preview
Pseudo Code:-
app.controller('myController', ['$scope', '$location','$http', 'ItemListService'
function($scope, $location, $http, ItemListService){
$scope.data = function(){
ItemListService.getAllItems(); //get all the items;
};
$scope.saveMethod = function(item){
$scope.data = ItemListService.save(item); //this is the refresh part, return data through save method. Pull the latest data and bind it to the scope.
$location.path('/fooView'); //dont think you even need this if you are entering data in a modal sorta thing, which on the same view.
}
}]);
You service should look like,
app.service('ItemListService', function(){
this.getAllItems = function(){
//get the items from itemList
//return all the items
}
this.save = function(item){
//save the item in itemList
//**return all items again, call getAllItems here too.
}
});
Hope this helps!!
You can switch https://github.com/angular-ui/ui-router it has method $state.reload() which can re-initialize whole controller.
If you dont want to switch ther is problem that controller is still living but you can implement after save
$rootScope.$broadcast('data:updated', $scope.data);
then wrap method of loading data in controller to function and then you can push new data to existing list / or make ajax reload
$rootScope.$on('data:updated',function(listener,data) {
$scope.data.push(data);
});
$rootScope.$on('data:updated',function()
{
callAjax.then(function(data) {
$scope.data = data;
}
});
https://docs.angularjs.org/api/ng/type/$rootScope.Scope#$on
Try $scope.dataModel.$save(); $location.url('/foobar'); Another reason might solve the problem is: when you redirect to /foobar, the controller of foobar should have a AJAX call to your server to load the new data. And you should use angular factory to make your AJAX calls. If it is still not working, can you give more information about the version of the angular you are using, as well as your backend framework and database.
$location.path("/login");
$timeout(() => $scope.$apply(), 1000);
works for me
What is the better solution to hide template while loading data from server?
My solution is using $scope with boolean variable isLoading and using directive ng-hide, ex: <div ng-hide='isLoading'></div>
Does angular has another way to make it?
You can try an use the ngCloak directive.
Checkout this link http://docs.angularjs.org/api/ng.directive:ngCloak
The way you do it is perfectly fine (I prefer using state='loading' and keep things a little bit more flexible.)
Another way of approaching this problem are promises and $routeProvider resolve property.
Using it delays controller execution until a set of specified promises is resolved, eg. data loaded via resource services is ready and correct. Tabs in Gmail work in a similar way, ie. you're not redirected to a new view unless data has been fetched from the server successfully. In case of errors, you stay in the same view or are redirected to an error page, not the view, you were trying to load and failed.
You could configure routes like this:
angular.module('app', [])
.config([
'$routeProvider',
function($routeProvider){
$routeProvider.when('/test',{
templateUrl: 'partials/test.html'
controller: TestCtrl,
resolve: TestCtrl.resolve
})
}
])
And your controller like this:
TestCtrl = function ($scope, data) {
$scope.data = data; // returned from resolve
}
TestCtrl.resolve = {
data: function ($q, DataService){
var d = $q.defer();
var onOK = function(res){
d.resolve(res);
};
var onError = function(res){
d.reject()
};
DataService.query(onOK, onError);
return d.promise;
}
}
Links:
Resolve
Aaa! Just found an excellent (yet surprisingly similar) explanation of the problem on SO HERE
That's how I do:
$scope.dodgson= DodgsonSvc.get();
In the html:
<div x-ng-show="dodgson.$resolved">We've got Dodgson here: {{dodgson}}. Nice hat</div>
<div x-ng-hide="dodgson.$resolved">Latina music (loading)</div>