CODEWITHSUNDEEP
ruby-on-railsforeign-keysruby-on-rails-5ruby-on-rails-5.2
Severin
Severin

Reputation: 8588

Rails belongs_to/has_many with external Model

In my Rails 5.2 application I want to reference another Model. I have the following setup in the application:

class SomeModule::AnotherModule::User < ApplicationRecord
  has_many :phones
end

class Phone < ApplicationRecord
  belongs_to :user, optional: true, class_name: '::SomeModule::AnotherModule::User'
end

The migration was done like so:

add_reference :phones, :user, foreign_key: true, index: true

Now, when I try to call upon the user from a phone I get this:

Phone.first.user
#=> NameError: uninitialized constant User::Phone
from /home/testuser/.rvm/gems/ruby-2.5.1/gems/activerecord-5.2.0/lib/active_record/inheritance.rb:196:in `compute_type'

Removing the class_name: attribute does not change anything.

What am I doing wrong?

Upvotes: 0

Views: 287

Answers (1)

Anand
Anand

Reputation: 6531

class SomeModule::AnotherModule::User < ApplicationRecord
  has_many :phones, class_name: 'Phone', foreign_key: 'user_id'
end

class Phone < ApplicationRecord
  belongs_to :user, optional: true, class_name: 'SomeModule::AnotherModule::User', foreign_key: 'user_id'
end

Upvotes: 3

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