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Home/ Questions/Q 7988911
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Editorial Team
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Editorial Team
Asked: June 4, 20262026-06-04T12:35:45+00:00 2026-06-04T12:35:45+00:00

I would like to have as a model Dogs has_one :cat and have a

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I would like to have as a model

Dogs
has_one :cat

and have a cat_id in the dog table… then I would like to call Dog.first.cat

This doesn’t seem to be working for me. Am I missing something

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  1. Editorial Team
    Editorial Team
    2026-06-04T12:35:46+00:00Added an answer on June 4, 2026 at 12:35 pm

    You’re using has_one, so it’s actually the cats table that should have the dog_id.

    In your case, you would use belongs_to :cat in the Dog model.

    Take a look at the doc: http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html#label-Is+it+a+belongs_to+or+has_one+association%3F

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