Setting expiration date based on creation date in model?

Rails
1

Hi,

I am handling some records that have expiration date. Records should
expire 30 days after its creation.

I could add the logic in the controller but I think that should/could be
done in the model.

How can I do that in the model?
Why is it better in the model than in the controller?

Thanks.

2

On 30 Jun 2008, at 08:20, comopasta Gr wrote:

How can I do that in the model?
def self.expire!
expirable = find :all, :conditions => [“created_at < ?”, 30.days.ago]

do something with expirable

end

Why is it better in the model than in the controller?

Because it’s none of your controller’s business.

Fred

3

Thank you Fred!

Excuse my ignorance but is the function called automatically?
I’ve seen the ! ending in some functions, I wonder what is the meaning
of it.

I have a couple of books on RoR, I think I need new ones already
covering more stuff right now :wink:

Thanks!

4

On 30 Jun 2008, at 11:32, comopasta Gr wrote:

Thank you Fred!

Excuse my ignorance but is the function called automatically?

Nope

I’ve seen the ! ending in some functions, I wonder what is the meaning
of it.

Whatever meaning it has is usually a convention (eg on String methods
with a ! modify inplace, the ones without return a copy with that
modification (eg gsub and gsub!).
As far as ruby itself is concerned it makes no difference
Fred

5

…is the function called automatically?

Nope

Sorry again, so from where and by who should that function be called? A
cron job for example?

Thanks once again.

6

On 30 Jun 2008, at 11:50, comopasta Gr wrote:

…is the function called automatically?

Nope

Sorry again, so from where and by who should that function be
called? A
cron job for example?

For example. I didn’t say anything about that because I haven’t the
faintest clue when you want it called.

Fred

7

Thanks guys. Looks clear now.

Cheers.

8

expirable = find :all, :conditions => [“created_at < ?”, 30.days.ago]

do something with expirable

 This u can write as a rake task and can be called it from cron

Sijo