Rails - Sep 2007 - 2 models -> 1 model and class with array

Hello,

I need a solution for my question -  i have 2 models, for example
person and city. model city will have 3 records every time(for example
London, Berlin, Madrid). Actually i used belongs_to, has_many between
this models and it''s fine, but all the times it run''s SQL  to
gel list
of cities. I want to use only one model person and create some class
that will contain this 3 records and when i will create a new person i
can choose from select box a city.

Thanks
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