Issue
One of the great things about angular is that you can have independent Modules that you can reuse in different places. Say that you have a module to paint, order, and do a lot of things with lists. Say that this module will be used all around your application. And finally, say that you want to populate it in different ways. Here is an example:
angular.module('list', []).controller('listController', ListController);
var app = angular.module('myapp', ['list']).controller('appController', AppController);
function AppController() {
this.name = "Misae";
this.fetch = function() {
console.log("feching");
//change ListController list
//do something else
}
}
function ListController() {
this.list = [1, 2, 3];
this.revert = function() {
this.list.reverse();
}
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div class="app" ng-app="myapp" ng-controller="appController as App">
<div class="filters">
Name:
<input type="text" ng-model="App.name" />
<button ng-click="App.fetch()">Fetch</button>
</div>
<div class="list" ng-controller="listController as List">
<button ng-click="List.revert()">Revert</button>
<ul>
<li ng-repeat="item in List.list">{{item}}</li>
</ul>
</div>
</div>
Now, when you click on Fetch button, you'll send the name (and other filters and stuff) to an API using $http
and so on. Then you get some data, including a list of items you want to paint. Then you want to send that list to the List
module, to be painted.
It has to be this way because you'll be using the list module in diferent places and it will always paint a list and add some features like reordering and reversing it. While the filters and the API connection will change, your list behaviour will not, so there must be 2 different modules.
That said, what is the best way to send the data to the List module after fetching it? With a Service?
Solution
You should be using Angular components for this task.
You should create a module with a component that will be displaying lists and providing some actions that will modify the list and tell the parent to update the value.
var list = angular.module('listModule', []);
list.controller('listCtrl', function() {
this.reverse = function() {
this.items = [].concat(this.items).reverse();
this.onUpdate({ newValue: this.items });
};
});
list.component('list', {
bindings: {
items: '<',
onUpdate: '&'
},
controller: 'listCtrl',
template: '<button ng-click="$ctrl.reverse()">Revert</button><ul><li ng-repeat="item in $ctrl.items">{{ item }}</li></ul>'
});
This way when you click on "Revert" list
component will reverse the array and execute the function provided in on-update
attribute of HTML element.
Then you can simply set your app to be dependent on this module
var app = angular.module('app', ['listModule']);
and use list
component
<list data-items="list" data-on-update="updateList(newValue)"></list>
You can see the rest of the code in the example
Answered By - Dennis Baizulin
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