Method for checking if an object can be destroyed based on its dependent restrict associations

Santiago_Palladino · January 31, 2012, 3:05pm

I have added a small method for checking if an object can be destroyed by checking if its associations marked as dependent restrict are empty or not. Since it seems something common to do, I wanted to ask if you think it is worth adding it to ActiveRecord, in which case I can fork it and add the change (as well as tests and doc), as described in

The gist for the monkeypatch I am doing now in the app is

gist.github.com

https://gist.github.com/spalladino/1710839

can_destroy.rb

class ActiveRecord::Base
  def can_destroy?
    self.class.reflect_on_all_associations.all? do |assoc|
      assoc.options[:dependent] != :restrict || (assoc.macro == :has_one && self.send(assoc.name).nil?) || (assoc.macro == :has_many && self.send(assoc.name).empty?)
    end
  end
end

My apologies if this is not the appropriate channel for discussing this. If it is not, I would appreciate some advice regarding where to ask this question or how to proceed.

Thanks!

Topic		Replies	Views
How to restrict deletion of ActiveRecord objects if there dependent records? rubyonrails-talk	3	118	August 6, 2007
How to test :dependent => :destroy rubyonrails-talk	3	152	April 16, 2009
Improve(?) has_many :dependent => :destroy before destroy callback rubyonrails-talk	0	172	February 3, 2009
:dependent => :delete_all not working rubyonrails-talk	3	113	April 18, 2007
unit test dependent destroy rubyonrails-talk	1	328	October 13, 2010

Method for checking if an object can be destroyed based on its dependent restrict associations

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