Databases
StackOverflow2013
Postsdbo
POKnockout mapping plugin not creating observable properties
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POKnockout mapping plugin not creating observable properties
    primarykey
    data
    text
    <p>I have a question regarding the use of the knockout mapping plugin.</p> <p>I'm fetching a simple array from the server and convert it into javascript objects using the mapping plugin. Since I want the properties on the items to be observable I'm supplying the pugin with a custom mapping for the create callback.</p> <pre><code> var meeting = function (id, titel, description) { var self = this; self.Id = id; self.Titel = ko.observable(titel); self.Description = ko.observable(description); self.Test = ko.computed(function () { return self.Description(); }); return self; } var mapping = { create: function (json) { return new meeting(json.data.Id, json.data.Titel, json.data.Description); } } </code></pre> <p>When I call the ko.mapping.fromJS(myFetchedData) I see (with debugger attached) the create-function being called for every item in my array. Everything is bound to the HTML controls fine. I see a li item appearing for every item in the array.</p> <pre><code>&lt;ul id="meetings" data-bind=" foreach: meetings"&gt; &lt;li class="ui-widget-content ui-corner-all"&gt; &lt;h1 data-bind="text: Titel" class="ui-widget-header"&gt;&lt;/h1&gt; &lt;div&gt; &lt;input type="text" data-bind="text: $data.Description || 'Omschrijving?'"&gt;&lt;/input&gt;, &lt;/div&gt; &lt;div&gt; &lt;input type="text" data-bind="text: $data.Test || 'Omschrijving?'"&gt;&lt;/input&gt;, &lt;/div&gt; &lt;a href="#" data-bind="click: $root.updateMeeting" &gt;Update&lt;/a&gt; &lt;a href="#" data-bind="click: $root.removeMeeting" &gt;Remove&lt;/a&gt;&lt;/p&gt; &lt;/li&gt; &lt;/ul&gt; </code></pre> <p>However: the Description property does not seem to be Observable. Changing the value does not result in an updated value of the Test-computed property.</p> <p>Am I missing something here?</p> <p>Any help would be appreciated.</p> <p>Full sample code can be found here: <a href="http://jsfiddle.net/dtiemstra/wRg88/" rel="nofollow">http://jsfiddle.net/dtiemstra/wRg88/</a></p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USDiederikTiemstra
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POKnockout mapping plugin not creating observable properties
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload