Ruby on Rails

  # I would do this.  This will save a portrait_id on a person object, which is the id of a photo.  This is most efficient because if you put the "belongs_to" association on the photo object, you'll end up with many photos with nil values for person_id.
  belongs_to :portrait, :class_name => "Photo" 
end 

class Photo < ActiveRecord::Base 
  attr_accessible :file_name, :name 
  belongs_to :attachment, :polymorphic => true

end 

On Wednesday, January 16, 2013 4:36:53 PM UTC-5, Walter Lee Davis wrote:

On Jan 16, 2013, at 4:23 PM, Walter Lee Davis wrote:

>
> On Jan 16, 2013, at 4:16 PM, Dave Aronson wrote:
>
>> On Wed, Jan 16, 2013 at 4:09 PM, Walter Lee Davis <wa...@wdstudio.com> wrote:
>>
>>> I would like to mark one image as being the "portrait" for this person,
>>
>> I'd suggest adding that a person has_one portrait, class_name: :Image.
>> In the UI you can have them select one of their Images (or none).
>>
>> -Dave
>
> Does that require me to add another belongs_to to the Image? If I add a has_one, won't I have to balance that on the other side?
>
> Walter

Just tried this in my stunt app, and it would require me to add a person_id to the Photo / Image model, which since it's polymorphic, is sort of beside the point.

Walter

>
>>
>> --
>> Dave Aronson, the T. Rex of Codosaurus LLC,
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>> taking contracts in or near NoVa or remote.
>> See information at http://www.Codosaur.us/.
>>
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