I realize this is an old thread I'm digging up, but I am running into the same
problem. I did the artists example from :

http://www.adobe.com/devnet/coldfusion/articles/data_app.html

The grid fills just fine but when I try to edit a cell I get:

Error: Unknown Property: 'constructor'

I looked around online and found others getting this error but no solutions.

Thanks,
Paul

--- In flexcoders@yahoogroups.com, "Jeff Vroom" <jvroom@...> wrote:
>
> Do you know ActionScript your objects from CF land are getting converted
> to? Typically they come across as Objects unless you are mapping a
> strong type in which case you need to mark those classes with [Managed].
> This appears to be something which does not extend Object - like maybe
> XML?
>
>
>
> If you can't tell, adding <mx:TraceTarget/> in MXML and using the debug
> player you can get a flashlog.txt which should have that information
> (feel free to send that to me directly offlist).
>
>
>
> We use the constructor property in some cases to determine which class
> we are dealing with but there are other ways we could do that.
>
>
>
> Jeff
>
>
>
> ________________________________
>
> From: flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com] On
> Behalf Of Alexander Tsoukias
> Sent: Saturday, March 29, 2008 9:53 AM
> To: flexcoders@yahoogroups.com
> Subject: [flexcoders] Error: Unknown Property: 'constructor'. when using
> LCDS
>
>
>
> The fill method works great using RTMP and it fills a datagrid.
>
> When i make the datagrid editable and change a value, It returns this
> error: Error: Unknown Property: 'constructor'.
>
> The backend is connected with coldfusion CFCs. Again the fill method
> works great.
>
> Thanks,
> Alexander
>