Leveraging the power of the AngularJS smart table

Looking to incorporate AngularJS smart table into my website, I've reviewed the documentation on smart table but am struggling with understanding how the app.factory functions here. Specifically, I'm interested in learning how to implement the createRandomItem function for data stored in my MongoDB database.

app.factory('Resource', ['$q', '$filter', '$timeout', function ($q, $filter, $timeout) {

    //service for communicating with the server
    var randomsItems = [];

    function createRandomItem(id) {
        var heroes = ['Batman', 'Superman', 'Robin', 'Thor', 'Hulk', 'Niki Larson', 'Stark', 'Bob Leponge'];
        return {
            id: id,
            name: heroes[Math.floor(Math.random() * 7)],
            age: Math.floor(Math.random() * 1000),
            saved: Math.floor(Math.random() * 10000)
        };

    }

    for (var i = 0; i < 1000; i++) {
        randomsItems.push(createRandomItem(i));
    }


    //simulation of server call
    function getPage(start, number, params) {

        var deferred = $q.defer();

        var filtered = params.search.predicateObject ? $filter('filter')(randomsItems, params.search.predicateObject) : randomsItems;
        if (params.sort.predicate) {
            filtered = $filter('orderBy')(filtered, params.sort.predicate, params.sort.reverse);
        }

        var result = filtered.slice(start, start + number);

        $timeout(function () {
            deferred.resolve({
                data: result,
                numberOfPages: Math.ceil(filtered.length / number)
            });
        }, 1500);


        return deferred.promise;
    }

    return {
        getPage: getPage
    };

}]);

Answer №1

Alright, it's my time to shine! Just kidding... your answer is below.

This example is quite straightforward if you're familiar with angular factory.

When using a factory service, it runs the code within the factory's definition and returns whatever is similar to calling a function.

The above code generates a list of random items (Avengers) into the array randomItems. It involves the use of the createRandomItem(id) function and a subsequent for loop.

The key lies in the getPage() method and what the Resource factory is returning.

So, when you call Resourse.getPage(), it will return a promise object that allows you to invoke other JS functions. Inside getPage(), there's a timeout to trigger resolve with an object containing variables like data and numberOfPages.

Here's a summary: by modifying the factory as shown below and using $http to fetch data from the server or database, you can address your issue:

app.factory('Resource', ['$http', '$q', '$filter', '$timeout', function ($http, $q, $filter, $timeout) 

Then, fetch data using $http.get(server_url) and resolve the promise with the response. Use the returned data as needed.

Finally, when using the service:

Resourse.getPage(1,2,3)
  .done(function(response){
     //handle the response from your factory
   });

Feel free to ask any questions in the comments!

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