Plan_subscription_model_relationship.rb

## Plan + Subscription Relationship

class ApplicationRecord < ActiveRecord::Base
  self.abstract_class = true
end

class Plan < ApplicationRecord
  has_many :subscriptions
end

class Subscription < ApplicationRecord
  belongs_to :plan
end


## If a User model is involved we could do this
## User + Plan + Subscription Relationship

class ApplicationRecord < ActiveRecord::Base
  self.abstract_class = true
end

class User < ApplicationRecord
  has_many :subscriptions
  has_many plans, through: :subscription
end

class Plan < ApplicationRecord
  has_many :subscriptions
  has_many :users, through: :subscriptions
end

class Subscription < ApplicationRecord
  belongs_to :user
  belongs_to :plan
end