Rails - Aug 2006 - Automatically creating associated records with after_create

Hi all.

I am actually using ActiveRecord outside of Rails but I don''t see that 
it matters for this question.

I want to automatically create a registration entry when I add a new 
user to my application. This works fine, but it''s not automatic:

class User < ActiveRecord :: Base
  has_many :registrations
end

class Test
  user = User.new
  user.registrations.create
end

I''d like the User class to do that automatically. I tried this but it 
didn''t work:

class User < ActiveRecord :: Base
  has_many :registrations
  after_create {
    self.registrations.create
  }
end

I feel like I''m just missing some syntax. Can anyone help?

Thanks!

/adam

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Adam Block <adam@...> writes:
> class User < ActiveRecord :: Base
>   has_many :registrations
>   after_create {
>     self.registrations.create
>   }
> end
self.registrations returns a list of Registration objects, and that list (I
assume it''s just an array) doesn''t have a .create method

self.registrations << Registration.new # should work though

The above should be read as "Append a new registration to
self.registrations"

Gareth

Thanks for the reply.

But I''m confused: if that''s the case, how come
user.registrations.create
works?

Anyway, I tried adding this line to the User class:

after_create { self.registrations << Registration.new(({:timestamp => 
Time.now})) }

And I got this error:

.../gems/activerecord-1.14.4/lib/active_record/base.rb:1129:in 
`method_missing'': undefined method `registrations'' for
User:Class
(NoMethodError)

Also, my Registration class looks like:

class Registration < ActiveRecord::Base
  belongs_to :users
end

I appreciate the assistance!

/afb

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

Adam Block wrote:
> Also, my Registration class looks like:
> 
> class Registration < ActiveRecord::Base
>   belongs_to :users
> end
You might try using ''belongs_to :user''.  The ActiveRecord
parser is
exacting in the names used in one-to-many models.

Jose

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

Jose, you are right and I fixed that but was still having the same 
problem.

Then I changed my User class to:

class User < ActiveRecord :: Base
  has_many :registrations
  after_create :create_new_registration

  private
    def create_new_registration
      self.registrations << Registration.new
    end
end

And that worked. Thanks all for your suggestions.

/afb

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