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observable does not obtain property defined on array

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Robert
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Robert asked on 05 May 2015, 10:26 PM

Create an array.  Add a non numeric property to it with a value.  Assign that array to an object as a property.  Create an observable of that object.  The array no longer has its non numeric property.  How can this be avoided?  The same test with an object (which is all an array is) works fine.  

http://jsfiddle.net/n54tke37/3/

 

The first half of that fiddle shows the object case which works.  The second half shows the array case which does not.  

 

 

 

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Rosen
Telerik team
answered on 07 May 2015, 02:31 PM

Hello Robert,

I'm afraid that this is by design behavior of the ObservableArray. As you know when converted into an observable object, the values of the Array will be used for constructing the ObservableArray instance. This means that custom fields defined on the original Array instance will not be transferred to the ObservableArray. If you need this field attached to the ObservableArray you will need to attach it manually, however there will be no change tracking available.

Regards,
Rosen
Telerik
 
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