Re: [Rubycocoa-talk] NSOutlineView crashing when trying to expand

[Chris M. <ch...@oc...>]

Hi Laurent

On 28 Dec 2006, at 17:17, Laurent Sansonetti wrote:

> Hi Chris,
>
> On Dec 28, 2006, at 2:11 PM, Chris McGrath wrote:
>
>> Hi, I'm having a problem with expanding items in a NSOutlineView. The
>> toplevel items appear fine, but nearly every time I go to expand them
>> I get a crash. It does occasionally work, which seems strange to me.
>>
> <snipped stuff>
> At a glance it looks like your problem is that you return pure-Ruby
> items (i.e. they do not inherit from NSObject) to NSOutlineView. So
> RubyCocoa has to create proxies for them that are collected at some
> time (for some reason), and NSOutlineView expects you to always return
> the same object (which is a well known problem also in the Objective-C
> world).
>
> Changing your TestData definition like this should fix the problem.
>
> <snipped code>

Yep, that worked, thanks Laurent. Unfortunately in my real app, the  
TestData objects are actually ActiveRecord objects, so I can't make  
them inherit from NSObject. I guess I'll either need to implement my  
own NSObject derived proxy for the AR objects for display, or look at  
just using CoreData. My app became a bit of a frankenapp with all the  
rails stuff I needed to include to get AR "working" anyway so  
CoreData is probably a saner bet. It looks like the ActiveSupport  
reloading stuff and RubyCocoa don't play well together. I could get  
different errors just by changing which was included first until I  
figured out how to hack the AR side enough to make some progress.

I think i'll try with my own proxy objects this evening anyway, just  
to see how far I can get.

Thanks again,

Chris