cheat sheets.

--- validations version 1	Thu Jul 09 23:14:12 -0700 2009
+++ validations version 2	Wed Dec 23 07:22:30 -0800 2009
@@ -1,53 +1,53 @@
 Basic Validations
 http://ar.rubyonrails.com/classes/ActiveRecord/Validations/ClassMethods.html
 
 def validate
   unless name && name =~ /^\w+$/
-    errors.add(:name, "is missing or valid")
+    errors.add(:name, "is missing or invalid")
   end
 end
 
 def validate_on_create
   if User.find_by_name(name)
     errors.add(:name, "is already being used")
   end
 end
 
 
 validates_acceptance_of
   Validates that the value of the attribute is the string "1" or the value of
   the :accept parameter. Useful for checkboxes.
 validates_associated
 validates_confirmation_of
 validates_each
 validates_exclusion_of
 validates_format_of
 validates_inclusion_of
 validates_length_of
 validates_numericality_of
 validates_presence_of
 validates_size_of
 validates_uniqueness_of
 
 DEFAULT_VALIDATION_OPTIONS = { :on => :save, :allow_nil => false, :allow_blank
 => false, :message => nil
 ALL_RANGE_OPTIONS = [ :is, :within, :in, :minimum, :maximum ].freeze
 ALL_NUMERICALITY_CHECK = { :greater_than => '>', :greater_than_or_equal_to =>
 '>=', :equal_to => '==', :less_than => '<', :less_than_or_equal_to => '<=', :odd
 => 'odd?', :even => 'even?' }.freeze
 
 
 validates_length_of :first_name, :maximum=>30
 validates_length_of :last_name, :maximum=>30, :message=>"less than {{count}} if
 you don't mind"
 validates_length_of :fax, :in => 7..32, :allow_nil => true
 validates_length_of :phone, :in => 7..32, :allow_blank => true
 validates_length_of :user_name, :within => 6..20, :too_long => "pick a shorter
 name", :too_short => "pick a longer name"
 validates_length_of :fav_bra_size, :minimum => 1, :too_short => "please enter at
 least {{count}} character"
 validates_length_of :smurf_leader, :is => 4, :message => "papa is spelled with
 {{count}} characters... don't play me."
 validates_length_of :essay, :minimum => 100, :too_short => "Your essay must be
 at least {{count}} words."), :tokenizer => lambda {|str| str.scan(/\w+/) }