class SomeClass < ActiveRecord::Base
# length
validates :content, :length => {
:minimum => 300,
:maximum => 400,
:tokenizer => lambda { |str| str.scan(/\w+/) },
:too_short => "must have at least %{count} words",
:too_long => "must have at most %{count} words"
}
validates :name,
:presence => true,
:length => { :within => 1..255, :allow_blank => true }
# format
validates :legacy_code, :format => { :with => /\A[a-zA-Z]+\z/,
:message => "Only letters allowed" }
validates_format_of :email,
:with => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i ,
:message => "E-mail is incorrect"
# in
validates :size, :inclusion => { :in => %w(small medium large),
:message => "%{value} is not a valid size" }
# numericality
validates :points, :numericality => true
validates :games_played, :numericality => { :only_integer => true } # Uses regex /\A[+-]?\d+\Z/
# presence
validates :order_id, :presence => true
validates_presence_of :order_
# uniqueness
validates :email, :uniqueness => true
validates :name, :uniqueness => { :scope => :year, :message => "should happen once per year" }
validates :name, :uniqueness => { :case_sensitive => false }
# allow_blank
validates :title, :length => { :is => 5 }, :allow_blank => true
# allow_nil
validates :size, :inclusion => { :in => %w(small medium large),
:message => "%{value} is not a valid size" }, :allow_nil => true
# on
validates :email, :uniqueness => true, :on => :create
# conditionals
validates :card_number, :presence => true, :if => :paid_with_card?
end
