angularjs filterfilter order by in controller / factory

Question

I have the following factory:

app.factory("ModuleFactory", function (api, $http, $q,filterFilter) {
var moduleList = [];
var categoryList = [];
var moduleTypeList = [];
var academyModuleTypeList = [];
var mostUsed = [];
var lastUpdated = null;
return {
    /**
     * @description This function gets the entire module list for the given users organization.
     * @author Marc Rasmussen
     * @returns {d.promise}
     */
    getList: function () {
        var d = $q.defer();
        if (moduleList.length == 0) {
            $http.get(api.getUrl('module', null))
                .success(function (response) {
                    moduleList = response;
                    lastUpdated = new Date();
                    d.resolve(response);
                });
        }
        else {
            d.resolve(moduleList);
        }
        return d.promise;
    },
    getMostUsed: function () {
        var d = $q.defer();
        if(moduleList.length <= 0){
            this.getList().then(function () {

            })
        }
    }
}
});

Now the list moduleList contains a list of objects in these objects there is a fieldnum_used

As you can see i have a created a function called getMostUsed this function needs to return the moduleList but ordered by the field num_used desc.

However i am not quite sure how to use filterFilter for this, i know that i could just use array.sort() however i wish to use the angular function for it if it is possible?

Can anyone point me in the right direction?

what is filterFilter? The name of a filter you defined?

toskv
– toskv

2015-10-06 17:10:13 +00:00
Commented Oct 6, 2015 at 17:10 — toskv
– toskv, Commented Oct 6, 2015 at 17:10

toskv · Accepted Answer · 2015-10-06 17:50:41Z

2

Assuming filterFilter is a filter you defined somewhere in your app, you can invoke it in your controllers/factories like this.

Import the angular $filter service.

app.factory("ModuleFactory", function(api, $http, $q, $filter) {

And when you need it you can request your filter and call it like this:

 $filter("filterFilter")(moduleList);

More info is available on the angular documentation page for $filter service here.

If what you want to do is order your moduleList by a given property you should be using the orderBy filter.

this.getList().then(function(moduleList) {
  $filter('orderBy')(moduleList, '-num_used'); // order descending by the num_used property
})

More info about the orderBy filter can be found here.

edited Oct 6, 2015 at 17:50

answered Oct 6, 2015 at 17:14

toskv

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3 Comments

Marc Rasmussen Over a year ago

@tovsky can you give an example if we only used the build in $filter method of angular?

toskv Over a year ago

do you mean the default filter called filter? @MarcRasmussen

toskv Over a year ago

@MarcRasmussen I added an example using orderBy to order the module list in a descending order. I hope that's what you wanted. :)

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