[Rails] class methods from module where active rec is involved

[Jedrin]

 I have a module as shown below and when I extend an active record to
use it, I can not access the
primary_key method. In a simple test program using a similar approach
where active record is not involved, access to the class methods seems
to work ok. What can I do to make this work or so that I can access
the class methods ?



##################################

require 'active_record'


DB_Host = 'localhost'
DB_Database = 'proj1'
DB_Port = 5432


ActiveRecord::Base.establish_connection(
  :adapter => "postgresql",
  :host => DB_Host,
  :database => DB_Database,
  :username => "me"
#  :password => "secret"
)

module ModelClassMethods

 def mycreate(pkey_val)
   pkey_fld = self.primary_key
 end

end

class ActiveNode < ActiveRecord::Base
  extend ModelClassMethods

  # include ModelMethods
end



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