Re: Core data binding "first" of to-many relationship
Re: Core data binding "first" of to-many relationship
- Subject: Re: Core data binding "first" of to-many relationship
- From: Sean McBride <email@hidden>
- Date: Sat, 27 Nov 2010 19:06:42 -0500
On Nov 27, 2010, at 17:44, Jerry Krinock wrote:
>> I have an NSArrayController that holds a set of persons. These persons have a to-many relationship of name objects. Usually they will only have one name, but there may be multiple (or even no name).
>>
>> In my interface, I have an NSTableView that will display the persons. The attributes are easy enough (gender, etc), but how can I bind the names to a column so only one name is shown for a person?
>
> Good old-fashioned code to the rescue. Implement a method in your Person class which returns such a name, and bind the table column to it. I think that as long as the column is not editable, you will not need a setter.
Additionally, in your Person class, implement keyPathsForValuesAffectingValueForKey: so that when the 'names' relationship changes, your 'primaryName' key does too.
Sean
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