Ruby on Rails - Bounded contexts via interface objects - Code Example 1

comment.rb

# app/models/comment.rb
class Comment < ActiveRecord::Base
  belongs_to :student
  belongs_to :work
end

lesson.rb

# app/models/lesson.rb
class Lesson < ActiveRecord::Base
  belongs_to :teacher
  has_many :works
  has_and_belongs_to_many :students

  def classroom
    @classroom ||= Classroom::LessonInterface.new(self)
  end

  def public_board
    @public_board ||= PublicBoard::LessonInterface.new(self)
  end
end

schema.rb

# db/schema.rb
ActiveRecord::Schema.define(version: 2019_05_22_134007) do
  create_table "lessons" do |t|
    t.string "title"
    t.bigint "teacher_id"
    t.boolean "published", default: false
  end

  create_table "students" do |t|
    t.string "email"
  end

  create_table "students_lessons" do |t|
    t.bigint "lesson_id"
    t.bigint "student_id"
  end

  create_table "teachers" do |t|
    t.string "email"
  end

  create_table "works" do |t|
    t.bigint "lesson_id"
    t.bigint "student_id"
  end

  create_table "comments" do |t|
    t.bi

student.rb

# app/models/student.rb
class Student < ActiveRecord::Base
  has_many :works
  has_many :comments
  has_and_belongs_to_many :lessons
end

teacher.rb

# app/models/teacher.rb
class Teacher < ActiveRecord::Base
  has_many :lessons

  def classroom
    @classroom ||= Classroom::TeacherInterface.new(self)
  end
end

work.rb

# app/models/work.rb
class Work < ActiveRecord::Base
  belongs_to :student
  belongs_to :lesson
  has_many :comments

  def classroom
    @classroom ||= Classroom::WorkInterface.new(self)
  end
end

This is a GIST for Medium mirror article Ruby on Rails - Bounded contexts via interface object

https://medium.com/@tomas.valent/ruby-on-rails-bounded-contexts-via-interface-objects-4fd61738acaa

Original article: https://blog.eq8.eu/article/rails-bounded-contexts.html

Full list of Article GISTs:

• https://gist.github.com/equivalent/06f752d99b0d438759e3de22dbd2e9bd
• https://gist.github.com/equivalent/f9c5bfcea6e0afc5eb0f87510b26a21f
• https://gist.github.com/equivalent/37845308ca12097a11152aae63399caa
• https://gist.github.com/equivalent/5697f58cc1dd50f94ff094d8949d0c50