Re: Core Data, sorting on dependent values
Re: Core Data, sorting on dependent values
- Subject: Re: Core Data, sorting on dependent values
- From: Dave Fernandes <email@hidden>
- Date: Thu, 26 Jul 2007 08:29:48 -0400
You can sort on transient properties. So make "fullName" a transient
property of Person.
Dave
On Jul 26, 2007, at 6:41 AM, Mickaël Remars wrote:
Hello,
I face an issue with Core Data and sorting.
Model side, I have a 'Person' entity. 'Person' has 'firstName' and
'lastName' attributes coded within Core Data model. Then, I have a
*derived value* 'fullName'.
Interface side, I have an NSArrayController based on 'Person'
entity. I also have an NSTableView which one column is bind to
derived value 'fullName'.
Now what I want to achieve is to sort table view by column
'fullName' *before* displaying the table. In other words, I don't
want the end-user to sort manually, at least on application
startup. So, when I *programatically* apply a sort descriptor based
on 'fullName' key, Core Data complains that 'fullName' is not part
of entity model. (I agree off course agree with that).
Does it mean that it is not possible to sort on a derived value
when using Core Data ?
If so, how can I implement that kind of sorting ?
Thank in advance
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