My question is just about the architecture of how to return the error for view. Here's the example below:
class Pessoa < ActiveRecord::Base
belongs_to :responsavel, class_name: 'Pessoa', foreign_key: 'responsavel_id'
end
class Alunos < Pessoa
end
With these models, I have the following form
.
You need to add accepts_nested_attributes_for :responsavel to your model Aluno
And in your form, you only need to do the following:
form_for @aluno do |f|
...
f.fields_for :responsavel do |r|
...
In your Alunos_Controller
def new
@aluno = Aluno.new
@aluno.build_responsavel
end
And @aluno.save should already care about creating the dependency of the responsible and adding the errors needed to show in the view.
In order not to create a duplicate, you can create a hook before_save in your student and check if the responsible exists, if it exists, use it instead of creating another one.
I hope this helps.