Rails 3 DateTime Comparison w/ Date In An ActiveRecord Query

Question

I\'m trying to search a model for any dates equal to a specific date while omitting the timestamp. In Rails I could simply execute this as DateTime.to_date == somedate

Answer 1

I would do something like...

someday = Date.today
Foo.where( :created_at => (someday)..(someday + 1.day) )

This would capture all created_at dates between midnight on someday and someday + 1. This is inclusive (so it would include a Foo created bang on midnight on the +1 day) but may be 'just good enough' for your needs without messing with timestamps.

For niceness, I would wrap it up as a scope

scope :on_day, ( lambda do |someday|
  where( :created_at => (someday)..(someday + 1.day) )
end )

So

Foo.on_day( Date.yesterday ).count

is nicely readable.