Re: Tree rest resource and sorting

Right after I sent the message I realized that I'd be beaten up by that.

So let me give details: Core Data doesn't store NSArray, but NSSet:
http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSSet_Class/Reference/Reference.html

Yes it's platform specific. but right now iOS is the most common one.
Core Data is the best way to serialize objects (IMHO) and I really want 
to use it.

Why should it be wrong to indicate the sort by an attribute?
It doesn't impact the server-side at all.

On 6/6/11 12:16 AM, Bharat Mediratta wrote:
>
> Hm.  An array is an ordered list, and I would expect NSArray to 
> maintain the ordering -- 
> http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSArray_Class/NSArray.html seems 
> to bear that out.  Are you seeing it lose the ordering?
>
> Even if it was, I'd expect that this is a platform specific problem so 
> I'd expect it'd be something you'd fix on your side by updating the 
> entity after you load it.  Doing it on the server side smells wrong to me.
>
> Thoughts?
>
> On Wed, Jun 1, 2011 at 10:55 AM, David Steinberger 
> <[email protected] <mailto:[email protected]>> wrote:
>
>     Team,
>
>     I'm reworking the data model of my iPhone app.
>     One thing I want to revisit is how I deal with the tree rest
>     resource (tree_rest.php).
>
>     Reason:
>     I know that the tree_rest.php delivers the objects in the right
>     order, but this doesn't help me much.
>     I need to store and retrieve the array and by doing such an
>     operation with an array the order might be lost.
>
>     Proposed solution:
>     The patch attached adds a relative_position attribute to each
>     entity. Via this attribute the entity order can be reconstructed
>     at any time. There's no impact on performance and overall structure.
>
>     Please review and merge to master or propose something even better.
>
>     Thanks,
>       David
>
>     ---
>
>     FYI Details:
>     I use core data to cache all objects (tree/album, items, tags,
>     ...). Core data is kind of a database for objects on iOS. The tree
>     is modeled via a Class that has a NSString property that holds the
>     url (that's the primary key) and a NSArray that holds all the
>     entities.
>     But when I retrieve the object-graph iOS applies any sorting. ==>
>     A sort-attribute is needed.
>
>     	
>
>     	
>
>     	
>
>     	
>
>     	
>
>
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