Your Electronic Books

If
you place it on both sides, you will create a dreaded infinite loop! Consider this example
(do not do this!):
class Account < ActiveRecord::Base
has_many :accountrights
validates_associated :accountrights
end
class Accountright < ActiveRecord::Base
belongs_to :account
validates_associated :account
end
??? The validates_associated method only ensures that the association is valid; it does not
check that the association is present. To do that, you should also include the validates_
presence_of method, as in this example:
class Account < ActiveRecord::Base
has_many :accountrights
end
class Accountright < ActiveRecord::Base
belongs_to :account
validates_associated :account
validates_presence_of :account, :on => :update
end
Validates_associated also accepts the :on and :if options explained in previous validation
methods.
validates_numericality_of
Use validates_numericality_of to ensure that the value of the associated attribute is numeric.
The following example ensures that the submitted value of account_age can be converted with
Kernal.


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