[Rails] Re: does rails enforce referential integrity???

[Łukasz Piestrzeniewicz]

Greg Hauptmann wrote:
> Hi,
> 
> Is rails supposed to support referential integrity?   That is rails 
> either support to be able to ensure that when a new contact is created 
> this can only happen if a valid suberb is associated with it, and which 
> mechanisms of the below are supposed to do this?
> (a) using DB foreign key constraints information as a basis?
> (b) using the "has_one" line in the model file to enfore?

Skip the db constrains and use Rails validations to achive referential 
integrity:

> --------------------------
> class Contact < ActiveRecord::Base
>   has_one :suberb
> end
> --------------------------
> class Suberb < ActiveRecord::Base
> 	belongs_to :contact
  validates_presence_of :contact_id
  validates_associated :contact
> end

Cheers,
Bragi

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