Creating complex types using Knockout.js observables is a straightforward process

Question

Creating complex types using Knockout.js observables is a straightforward process

Currently, I am delving into the world of knockout.js and finding it quite challenging to figure out how to create nested complex types within it.

For instance, in my backend model, I have defined:

class Person {
  public string Name {get; set;}
  public int Age {get; set;}
  public List<Colors> FavoriteColors {get; set;}
}

class Color {
  public int ColorId {get; set;}
  public string Name {get; set;}
}

When asp.net mvc outputs JSON for a List<Person> type, it looks something like this:

[{"Name":"JC","Age":24,"Colors":[{"ColorId":1,"Name":"Red"},{"ColorId":2,"Name":"Blue"}]},
{"Name":"Albert","Age":29,"Colors":{"ColorId":2,"Name":"Blue"}}]

My goal now is to map this data using observables fetched through Jquery Ajax. While I understand that FavoriteColors will be an array, I'm uncertain about how to proceed...

I would greatly appreciate any guidance on this!

UPDATE:

Is there anyone who can assist me with this issue? (I attempted a prototype, but encountered issues with my select functionality)

http://jsbin.com/eqihun/3/edit#javascript,html,live

c#javascript asp.net-mvc json knockout.js

Answer 1

Answer №1

Check out this amazing resource on the knockout mapping plugin

update: I have made some modifications to your sample here: http://jsbin.com/eqihun/22/edit

Answer 2

Check out this amazing resource on the knockout mapping plugin

update: I have made some modifications to your sample here: http://jsbin.com/eqihun/22/edit

Answer 3

Answer №2

link to the solution can be found here.

$(document).ready(function(){

  //document.writeln(data[0].Colors[0].Name);

  //if I map anything to ko.observable, it would be sent through ko.toJSON... so that means that Color stuff should NOT be mapped, especially because that's not what MVC is asking, but rather List<Colors>...

  var Color = function (id, name) {
     var self = this;
     self.colorId = id;
     self.name = name;
  };

 function viewModel() {
    var self = this;
    self.Name = ko.observable("Bert");
    self.Age = ko.observable('12');
    self.FavoriteColors = ko.observableArray([
      new Color(1, "Blue"), 
      new Color(2, "Red"), 
      new Color(3, "White")
    ]);
  } 
  ko.applyBindings(new viewModel());    
});

HTML:

<script class="jsbin" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
  <script src="https://raw.github.com/SteveSanderson/knockout/master/build/output/knockout-latest.debug.js" type="text/javascript"></script>
<meta charset=utf-8 />
<title>JS Bin</title>
<!--[if IE]>
  <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<style>
  article, aside, figure, footer, header, hgroup, 
  menu, nav, section { display: block; }
</style>
</head>
<body>

  <p>Name: <input type="text" data-bind="value: Name" name="Name"></p>
  <p>Age: <input type="text" data-bind="value: Age" name="Name"></p>


  <select data-bind="options: FavoriteColors, optionsText: 'name', value: 'colorId', optionsCaption: 'Choose...'"></select>

Answer 4

link to the solution can be found here.

$(document).ready(function(){

  //document.writeln(data[0].Colors[0].Name);

  //if I map anything to ko.observable, it would be sent through ko.toJSON... so that means that Color stuff should NOT be mapped, especially because that's not what MVC is asking, but rather List<Colors>...

  var Color = function (id, name) {
     var self = this;
     self.colorId = id;
     self.name = name;
  };

 function viewModel() {
    var self = this;
    self.Name = ko.observable("Bert");
    self.Age = ko.observable('12');
    self.FavoriteColors = ko.observableArray([
      new Color(1, "Blue"), 
      new Color(2, "Red"), 
      new Color(3, "White")
    ]);
  } 
  ko.applyBindings(new viewModel());    
});

HTML:

<script class="jsbin" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
  <script src="https://raw.github.com/SteveSanderson/knockout/master/build/output/knockout-latest.debug.js" type="text/javascript"></script>
<meta charset=utf-8 />
<title>JS Bin</title>
<!--[if IE]>
  <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<style>
  article, aside, figure, footer, header, hgroup, 
  menu, nav, section { display: block; }
</style>
</head>
<body>

  <p>Name: <input type="text" data-bind="value: Name" name="Name"></p>
  <p>Age: <input type="text" data-bind="value: Age" name="Name"></p>


  <select data-bind="options: FavoriteColors, optionsText: 'name', value: 'colorId', optionsCaption: 'Choose...'"></select>

Creating complex types using Knockout.js observables is a straightforward process

Answer №1

Answer №2

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