Add validates method as shortcut to setup validators for a given set of attributes:

class Person < ActiveRecord::Base
  include MyValidators

  validates :name, :presence => true, :uniqueness => true, :length => { :maximum => 100 }
  validates :email, :presence => true, :email => true
end

[#3058 status:resolved]

Signed-off-by: José Valim <jose.valim@gmail.com>

1 files changed, 29 insertions, 18 deletions

diff --git a/activemodel/lib/active_model/validations/with.rb b/activemodel/lib/active_model/validations/with.rb
index 8d521173c6..db563876af 100644
--- a/activemodel/lib/active_model/validations/with.rb
+++ b/activemodel/lib/active_model/validations/with.rb
@@ -2,14 +2,16 @@ module ActiveModel
   module Validations
     module ClassMethods
 
-      # Passes the record off to the class or classes specified and allows them to add errors based on more complex conditions.
+      # Passes the record off to the class or classes specified and allows them
+      # to add errors based on more complex conditions.
       #
-      #   class Person < ActiveRecord::Base
+      #   class Person
+      #     include ActiveModel::Validations
       #     validates_with MyValidator
       #   end
       #
-      #   class MyValidator < ActiveRecord::Validator
-      #     def validate
+      #   class MyValidator < ActiveModel::Validator
+      #     def validate(record)
       #       if some_complex_logic
       #         record.errors[:base] << "This record is invalid"
       #       end
@@ -23,37 +25,46 @@ module ActiveModel
       #
       # You may also pass it multiple classes, like so:
       #
-      #   class Person < ActiveRecord::Base
+      #   class Person
+      #     include ActiveModel::Validations
       #     validates_with MyValidator, MyOtherValidator, :on => :create
       #   end
       #
       # Configuration options:
-      # * <tt>on</tt> - Specifies when this validation is active (<tt>:create</tt> or <tt>:update</tt>
-      # * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
-      #   occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>).
+      # * <tt>on</tt> - Specifies when this validation is active
+      #   (<tt>:create</tt> or <tt>:update</tt>
+      # * <tt>if</tt> - Specifies a method, proc or string to call to determine
+      #   if the validation should occur (e.g. <tt>:if => :allow_validation</tt>,
+      #   or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>).
       #   The method, proc or string should return or evaluate to a true or false value.
-      # * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
-      #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>).
+      # * <tt>unless</tt> - Specifies a method, proc or string to call to
+      #   determine if the validation should not occur
+      #   (e.g. <tt>:unless => :skip_validation</tt>, or
+      #   <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>).
       #   The method, proc or string should return or evaluate to a true or false value.
       #
-      # If you pass any additional configuration options, they will be passed to the class and available as <tt>options</tt>:
+      # If you pass any additional configuration options, they will be passed
+      # to the class and available as <tt>options</tt>:
       #
-      #   class Person < ActiveRecord::Base
+      #   class Person
+      #     include ActiveModel::Validations
       #     validates_with MyValidator, :my_custom_key => "my custom value"
       #   end
       #
-      #   class MyValidator < ActiveRecord::Validator
-      #     def validate
+      #   class MyValidator < ActiveModel::Validator
+      #     def validate(record)
       #       options[:my_custom_key] # => "my custom value"
       #     end
       #   end
       #
       def validates_with(*args, &block)
         options = args.extract_options!
-        args.each { |klass| validate(klass.new(options, &block), options) }
+        args.each do |klass|
+          validator = klass.new(options, &block)
+          validator.setup(self) if validator.respond_to?(:setup)
+          validate(validator, options)
+        end
       end
     end
   end
-end
-
-
+end
\ No newline at end of file