CakePHP - Customer has multiple Country fields. How do I link the Country model to Customer?
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The countries table looks like this:

    iso | name
    --------------------------
    AD  | Andorra
    AE  | United Arab Emirates
    AF  | Afghanistan
    
    ...etc

My customers table has the following fields which all store a country code:

    id | country_origin | current_country_study | address_country
    --------------------------------------------------------
    54 | BE             | GB                    | GB

I'm not sure how to link the Country model so that I can retrieve the *name* of the countries when I am doing a find on the Customer model. If I had one field called `country_id` I would be okay, but not sure how to do it with multiple fields.