Hi all. Could you please recommend elegant way (read - best practices in "Rails way", less DB calls) to solve the following situation ?
I have 2 tables: Meter - has_many :meter_records MeterRecord - belong_to :meter I have to calculate difference between meter's current month record and same meter's previous month record. I would like to avoid unnecessary selects from DB and also avoid dealing with SQL - I prefer functionality provided by ActiveRecord. Can you please recommend the solution or at least point me to a good tutorial ? Thank you in advance. Artūras -- 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 rubyonrails-talk@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
