This gem is NOT maintained. The funcationality has been replaced by ActiveRecord `with_option`: guides.rubyonrails.org/active_record_validations.html#grouping-conditional-validations. I'd like to think this gem had a little something to do with that being added to AR :)
This gem allows similar ActiveRecord validates_* commands to be grouped together in blocks and pruned of repeated parameters.
How often have you had a block of validation commands in an ActiveRecord object that are repeated, especially :id or :unless options? Does this look familiar?
validates_presence_of :hair, :hair_color, :unless => :bald? validates_length_of :hair, :within => 3..15, :unless => :bald? validates_inclusion_of :hair_color, :in => HAIR_COLORS, :unless => bald?
Instead, this gem will allow you to replace the above code with:
validate_block :unless => :bald? do presence_of :hair, :hair_color length_of :hair, :within => 3..15 inclusion_of :hair_color, :in => HAIR_COLORS end
..which is a great way to DRY your :hair, don't you think?
Basically, this gem 1) removes the requirement to have 'validates_' on the front of the commands and 2) passes the options on the validate_block command to each validation command inside the block.
The syntax of the validation commands remains the same. Keeping the 'validates_*' prefix on the commands inside the block will work but it is not required.
require 'rubygems' require 'activerecord' require 'validate_block' class SomeObject < ActiveRecord::Base validate_block :if => :some_method? do presence_of :some_field inclusion_of :some_other_field, :in => SOME_VALUES end end
ActiveRecord >= 2.1.0
sudo gem install validate_block