Ruby on Rails helps with models, namespace and many-to-many reactions

Question

Ruby on Rails helps with models, namespace and many-to-many reactions

Navigation

#1 by (1 votes)
#2 by (0 votes)
#3 by (0 votes)

0

I have problems managing the namespace , I have the following models:

class Administradora::Owner < ApplicationRecord
  has_many :owner_mails, foreign_key: :administradora_owner_id
  has_many :junta_mails, through: :owner_mails
end

class Junta::Mail < ApplicationRecord
  has_many :owner_mails, class_name: "OwnerMail", foreign_key: :junta_mail_id
  has_many :adminstradora_owners, through: :owner_mails
end

class OwnerMail < ApplicationRecord
  belongs_to :administradora_owner, foreign_key: :owner_id, primary_key: :administradora_owner_id
  belongs_to :junta_mail, foreign_key: :mail_id, primary_key: :mail_id
end

By console I can do the following:

Administradora::Owner.first.owner_mails
Junta::Mail.find(4).owner_mails

It works fine, but if I try:

x = OwnerMail.create(administradora_owner_id: 4,junta_mail_id: 3, created_at: "2016/04/04", updated_at: "2016/04/04")
   (0.2ms)  BEGIN
   (0.5ms)  ROLLBACK

The id 4 and 3 exist in their respective tables and the error is:

ActiveRecord :: RecordInvalid: Validation failed: Administrator owner must exist, Board mail must exist

I do not know what may be happening.

ruby-on-rails namespace

asked by josedes 27.06.2017 в 18:15

source

3 answers

How to prevent me from printing garbage from an array? Path not found in my @ Html.Action

score 1 · Answer 1

There are several points that can cause the behavior you describe:

As highlighted yorodm in your response , it is necessary to use class_name to specify the class when the models are in different namespaces (you can see more information, in English, here ).

Verify that the names of the id in your tables are correct; For example, if you are following the rails standards, administradora_owner_id should be simply owner_id (this can be verified in your migrations).

You only need to specify foreign_key / primary_key for the columns of id that do not follow the rails standards, otherwise you can omit them; but in any case you must be consistent.

For example in Junta::Mail you have:

has_many :owner_mails, class_name: "OwnerMail", foreign_key: :junta_mail_id

While in OwnerMail you have:

belongs_to :junta_mail, foreign_key: :mail_id, primary_key: :mail_id

Both refer to id of Junta::Mail , but with different column.

Considering the above, your models could be modified to look like this 1 :

class Administradora::Owner < ApplicationRecord
  has_many :owner_mails
  has_many :mails, through: :owner_mails
end

class Junta::Mail < ApplicationRecord
  has_many :owner_mails
  has_many :owners, through: :owner_mails
end

class OwnerMail < ApplicationRecord
  belongs_to :owner, class: "Administradora::Owner"
  belongs_to :mail, class: "Junta::Mail"
end

1 I assume that the columns of id of Administradora::Owner and Junta::Mail are owner_id and mail_id respectively (that is, follow the standards of rails); if not, add the foreign_key of each table.

score 0 · Answer 2

Probably not exactly the solution you want but whenever I use models in different modules I use the class_name option to create relationships. It would look like this:

belongs_to ... :class_name => 'Administradora::Owner'

score 0 · Answer 3

In fact, I was able to solve it in the following way:

class Administradora::Owner < ApplicationRecord
  has_many :owner_mails, foreign_key: :administradora_owner_id, dependent: :destroy
  has_many :junta_mails, through: :owner_mails
  :administradora_owner_id
end

class Junta::Mail < ApplicationRecord
  has_many :owner_mails, foreign_key: :junta_mail_id, dependent: :destroy
  has_many :administradora_owners, through: :owner_mails
end

class OwnerMail < ApplicationRecord
  belongs_to :administradora_owner,  class_name: "Administradora::Owner", foreign_key: :administradora_owner_id
  belongs_to :junta_mail,  class_name: "Junta::Mail", foreign_key: :junta_mail_id
end

I can now create and I can search the join table through the models of Administradora::Owner and Junta::mail