Rails - Nov 2005 - Selective Validations (feedback please)

# I''m mostly done with a simple plugin that lets you apply validations
in named groups.  This is expecially useful for multipage forms or
wizards.  I thought I''d put the idea up for feedback. Please let me
know what you think!
# Sample code below...

class Sample < ActiveRecord::Base
  validation_group "v1" do
    validates_presence_of :field
    validates_numericality_of :other_field
  end

  #Validation groups can overlap, and have different aliases
  named_validation ["v2", "size_validations"] {
validates_size_of
:field, :in => 0..9 }
  named_validation ["v3", "size_validations"] {
validates_size_of
:some_field, :in => 0..9 }

  # ...
end

# ...

# All validations enabled by default.
Sample.disable_validations ["v2", "v3"]
Sample.disable_only_validations ["v2", "v3"] #Enable all,
then disable specified
Sample.enable_validations "v1"
Sample.enable_only_validations "v3" #Disable all, then enable
specified
Sample.enable_validations #Enable all

# Now tell me what you think.

I''ve been looking for this!

I need to check if an object is valid, except for one field, which
won''t
be valid until I do some processing.  But I don''t want to do that 
processing unless the object is already valid otherwise.  Right now, 
there''s no simple way to do this check.

Nice work (at least, looking at the interface..).

I would like something like
obj.valid_excluding_group_x?


kyle wrote:
> # I''m mostly done with a simple plugin that lets you apply
validations
> in named groups.  This is expecially useful for multipage forms or
> wizards.  I thought I''d put the idea up for feedback. Please let
me
> know what you think!
> # Sample code below...
> 
> class Sample < ActiveRecord::Base
>   validation_group "v1" do
>     validates_presence_of :field
>     validates_numericality_of :other_field
>   end
> 
>   #Validation groups can overlap, and have different aliases
>   named_validation ["v2", "size_validations"] {
validates_size_of
> :field, :in => 0..9 }
>   named_validation ["v3", "size_validations"] {
validates_size_of
> :some_field, :in => 0..9 }
> 
>   # ...
> end
> 
> # ...
> 
> # All validations enabled by default.
> Sample.disable_validations ["v2", "v3"]
> Sample.disable_only_validations ["v2", "v3"] #Enable
all, then disable
> specified
> Sample.enable_validations "v1"
> Sample.enable_only_validations "v3" #Disable all, then enable
specified
> Sample.enable_validations #Enable all
> 
> # Now tell me what you think.

-- 
Posted via http://www.ruby-forum.com/.

Great, it''s very interesting, but where can I get this plugin? Is it 
open source?
Now I am writing something like...

validates_presence_of :name, :if => Proc.new { |user| 
user.method=:sign_up}

def self.sign_up
    user=User.new...
    user.method=:sign_up
    user.save
end

It is ugly and not flexible :(

-- 
Posted via http://www.ruby-forum.com/.