knockout.js - Why is KnockoutJS not showing the same number of objects as my Web API controller? -


the solution same in question: how observablearray's length?

...but question unique in same situation have easier time finding answer did.

i'm new knockout , web api. i've built following based upon similar code found in few different tutorials.

function myviewmodel() {     var self = this;     self.objects = ko.observablearray([]);      $.getjson("http://localhost:xxxx/api/getobjects", function (data,status,xhr) {         self.objects(data);         alert(xhr + " " + status + ", " + "objects returned: " +  self.objects.length);     } }  ko.applybindings(new myviewmodel());

in controller, goal filter objects table in database matchingid matches current user's id. have in controller:

public iqueryable<myobject> getobjects() {     this.applicationdbcontext - new applicationdbcontext();     this.usermanager = new usermanager<applicationuser>(this.applicationdbcontext));     var user = usermanager.findbyid(user.identity.getuserid());      var query = db.myobjects.where(a => a.matchingid == user.id);      return query; }

i've stepped through , confirmed query pulling desired records database, yet response received on client side empty. here output of alert:

alert(xhr + " " + status + ", " + "objects returned: " + self.objects.length);  // yields this: // "200 success, objects returned: 0"

there 4 valid objects in query on server-side. can me figure out why didn't transfer through?

ko.observablearray have length property, property of observablearray function itself, not of array:

https://developer.mozilla.org/en-us/docs/web/javascript/reference/global_objects/function/length

to length of enclosed array, invoke observablearray call length: self.object().length. example in code, change alert to:

alert(xhr + " " + status + ", " + "objects returned: " + self.objects().length);

and should give '4' you're after.

ref: how observablearray's length?


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