Ruby Forum Ruby on Rails > where is save_without_validation ?

Can someone tell me where this is at or how it gets created?  There must
be some magic to it.

Thank you,
Perry

>> a = Author.new(:name => "Test")
=> #<Author:0x34eaa54 @attributes={"name"=>"Test", "email"=>nil,
"created_at"=>nil}, @new_record=true>
 >> a.save
=> false
 >> a.errors
=> #<ActiveRecord::Errors:0x34e92f8 @base=#<Author:0x34eaa54
@errors=#<ActiveRecord::Errors:0x34e92f8 ...>, @attributes=
{"name"=>"Test", "modified_at"=>nil, "url"=>nil, "is_active"=>false,
"hashed_pass"=>nil, "email"=>nil, "created_at"=>nil},
@new_record=true>, @errors={"email"=>["can't be blank"]}>
 >> a.save(false)
=> true

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Perry Smith wrote:
> Can someone tell me where this is at or how it gets created?  There must
> be some magic to it.
> 
In active_support/core_ext/module/aliasing.rb, there is a instance 
method added to module called alias_method_chain.  It is used in a lot 
of places, like validations.rb around line 221.  You see:

        alias_method_chain :save, :validation
        alias_method_chain :save!, :validation
        alias_method_chain :update_attribute, :validation_skipping

This creates two aliases as described by the comments:

  #   alias_method_chain :foo?, :feature
  #
  # is equivalent to
  #
  #   alias_method :foo_without_feature?, :foo?
  #   alias_method :foo?, :foo_with_feature?

So, in this case save_without_validation points to what save use to 
point to and now save points to save_with_validation.  So, in the code, 
you will see a call to save and in the stack trace.  But the line 
numbers will be inside save_with_validation.  (or foo_with_feature in 
the general case).   foo_with_feature will then usually call 
foo_without_feature to call the original foo routine.

Pretty nifty trick.

Zach Inglis // LT3media wrote:

> >> a.save(false)
> => true

A> What's wrong with calling save_without_validation? Is that
      /de-facto/ private?

B> validations involving unique table keys require lots of
       database hits, so saving without validation is faster,
       right?

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