Hi - I want to add my own validation to a rails app, and need help
making it global to my app. Basically, the validation makes sure a
number is positive - I found this code on the at
http://snippets.dzone.com/posts/show/822:
module CustomValidations
def validates_positive_or_zero(*attr_names)
configuration = { :message => "Cannot be negative" }
configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash)
validates_each attr_names do |m, a, v|
m.errors.add(a, configuration[:message]) if v<0
end
end
end
I want to use it in my models like any other validation:
class SomeModel < ActiveRecord::Base
validates_positivity_of :some_number, :another_number
end
I saved it in lib/custom_validations.rb, and tried including it in the
top of my environment.rb to extend AR:
include ''custom_validations''
class ActiveRecord::Base
include CustomValidations
end
#.. rest of file
Sadly, this won''t work. How do I make rails identify this module and
use
it properly?
--
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sa 125 wrote:> I saved it in lib/custom_validations.rb, and tried including it in the > top of my environment.rb to extend AR: > > include ''custom_validations'' > class ActiveRecord::Base > include CustomValidations > end > > #.. rest of file > > Sadly, this won''t work.Always include even a snip of the error message you got. After your detailed writeup, just claiming "won''t work" leaves us bereft of closure! However, the top of environment.rb might be before "require ''active_record''". That means ''class'' would introduce ''ActiveRecord'', leaving ''Base'' as a missing identifier. If so, move it to the bottom! -- Phlip --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
my bad. I moved that block to the bottom of the environment.rb file, after the "end" of the Rails::Initializer code, but got this error: NoMethodError (undefined method ''validates_positivity_of'' for #<Class...>) /../active_record/base.rb:1833:in ''method missing'' I tried loading this method though ./script/console: irb> include CustomValidations irb> validates_positivity_of 2 NoMethodError: undefined method ''validates_each'' for #<object..> from /../lib/custom_validations.rb:6:in ''validates_positivity_of'' Now I''m not even sure if the function works properly. -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
It isn`t include in your case, it`s extend: include ''custom_validations'' class ActiveRecord::Base extend CustomValidations end Here''s a better explanation why -> http://blog.codevader.com/2008/09/27/including-and-extending-modules-in-ruby/ - Maurício Linhares http://alinhavado.wordpress.com/ (pt-br) | http://blog.codevader.com/ (en) On Sun, Feb 22, 2009 at 6:24 AM, sa 125 <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:> > Hi - I want to add my own validation to a rails app, and need help > making it global to my app. Basically, the validation makes sure a > number is positive - I found this code on the at > http://snippets.dzone.com/posts/show/822: > > module CustomValidations > > def validates_positive_or_zero(*attr_names) > configuration = { :message => "Cannot be negative" } > configuration.update(attr_names.pop) if attr_names.last.is_a?(Hash) > validates_each attr_names do |m, a, v| > m.errors.add(a, configuration[:message]) if v<0 > end > end > > end > > I want to use it in my models like any other validation: > > class SomeModel < ActiveRecord::Base > validates_positivity_of :some_number, :another_number > end > > I saved it in lib/custom_validations.rb, and tried including it in the > top of my environment.rb to extend AR: > > include ''custom_validations'' > class ActiveRecord::Base > include CustomValidations > end > > #.. rest of file > > Sadly, this won''t work. How do I make rails identify this module and use > it properly? > -- > Posted via http://www.ruby-forum.com/. > > > >--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---