Updating updated_at column on a belongs_to

Rails
1

I have a…

class Resort < ActiveRecord::Base
has_many :photos, :order => “position”
end

class Photo < ActiveRecord::Base
belongs_to :resort
end

What I have a problem with is that if I update a photo I really need the
updated_at attribute on the Resort to change as well, how do I do this?

Thanks

bb

2

bingo bob wrote:

I have a…

class Resort < ActiveRecord::Base
has_many :photos, :order => “position”
end

class Photo < ActiveRecord::Base
belongs_to :resort
end

What I have a problem with is that if I update a photo I really need the
updated_at attribute on the Resort to change as well, how do I do this?

Use an after_update callback on Photo.

Thanks

bb

Best,
–Â
Marnen Laibow-Koser
http://www.marnen.org
[email protected]Â

3

Ok.

Could you kindly clarify?

In my Photo model?

What would I put?

after_update… Do something with Resort.

Bb

4

bingo bob wrote:

Ok.

Could you kindly clarify?

In my Photo model?

What would I put?

after_update… Do something with Resort.

Right. Go read about ActiveRecord callbacks and all will become clear.

Bb

Best,
–Â
Marnen Laibow-Koser
http://www.marnen.org
[email protected]Â

5

Marnen Laibow-Koser wrote:

bingo bob wrote:

Ok.

Could you kindly clarify?

In my Photo model?

What would I put?

after_update… Do something with Resort.

Right. Go read about ActiveRecord callbacks and all will become clear.

And, assuming you’re using a recent version or Rails you can ‘touch’
your models:

http://afreshcup.com/home/2009/4/19/touch-your-active-record-instances.html

6

Just to update and help anyone else.
As is mentioned above I simply touched and it simply worked.
Rails is beautiful sometimes :-).

class Photo < ActiveRecord::Base
belongs_to :resort, :touch => true
end

Thanks all.