sql - RAILS: has_one association based on non PK column -


i have following tables: 

users    [id | name | type]  types   [id | title]

i need setup has_one association ('users'.type => 'types'.id). but, understand, when write like:

user.rb

has_one :type

it seems create relation between 'users'.id , 'types'.id. how specify 'users'.type => 'types'.id has_one association?

finally found solution:

user.rb

belongs_to :type

type.rb

has_many :users, foreign_key: "type_id"

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