app/models/swatch.rb
# == Schema Information
#
# Table name: swatches
#
# id :integer not null, primary key
# lacquer_id :integer
# user_id :integer
# created_at :datetime
# updated_at :datetime
# image_file_name :string(255)
# image_content_type :string(255)
# image_file_size :integer
# image_updated_at :datetime
#
class Swatch < ActiveRecord::Base
belongs_to :lacquer
belongs_to :user
has_attached_file :image, :styles => { :medium => "300x300>", :thumb => "100x100>" }
validates :image_file_size, presence: true
validates_attachment_content_type :image, :content_type => /\Aimage\/.*\Z/
end