They're not the same, right. I mean, it depends on what you need. The real ID or just an amount of records.
But If task is to get random record you will Company.all[rand(Company.count)] but not Company.all[rand(Company.last.id)] On Mon, Apr 19, 2010 at 11:29 PM, Hassan Schroeder < [email protected]> wrote: > On Mon, Apr 19, 2010 at 9:03 AM, Vladimir Rybas <[email protected]> > wrote: > > To find the last id of MyModel you could do > > MyModel.last.id > > even souds like it should ) > > But it's not what you really want for upper bound. In your case > > MyModel.count(:all) or just MyModel.count > > will fit better > > ? That's not the same. If I have a DB that assigns IDs sequentially, > and I've created 5 instances, the last id will be 5. > > If I subsequently destroy an instance, e.g. id == 1, the last id is still > 5, but the count is 4. > > -- > Hassan Schroeder ------------------------ [email protected] > twitter: @hassan > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<rubyonrails-talk%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
