ValidatesOverlap¶ ↑

This project rocks and uses MIT-LICENSE.

This gem is available only for Rails 3.¶ ↑

When this gem should be helpful for you?¶ ↑

If you are developing Rails 3 app, let say some meeting planner and you can’t save records which have time overlap.

Using¶ ↑

Add to your gemfile

gem 'validates_overlap'

In your model

without scope

validates :starts_at, :ends_at, :overlap => true

with scope

validates :starts_at, :ends_at, :overlap => {:scope => "user_id"}