New posts in Ruby On Rails 3

Carrierwave, creating a duplicate attachment when duplicating its containing model

Find all records which have a count of an association greater than zero

Devise error: email can't be blank

How to write update all conditionally queries in rails4

Rails - Check if an Object is ActiveRecord or not

Ruby on Rails Web Application to iOS or Android app?

Rails - Get the time difference in hours, minutes and seconds

Rails admin hide belongs_to field in has_many nested form

Tracking model changes in after_commit :on => :create callback

Updating timestamps with #update_all