Woofers Modelling

v1_models.rb

class User < ApplicationRecord
  has_many :dogs
end

class Dog < ApplicationRecord
  belongs_to :user
end

v2_models.rb

class User < ApplicationRecord
  has_many :dogs
  has_many :dog_walkers
end

class Dog < ApplicationRecord
  belongs_to :user
end

class DogWalker < ApplicationRecord
  belongs_to :user
  has_many :dogs
end

class Owner < Application Record
  belongs_to :user
  has_many :dogs, through: :user
end

v3_models.rb

class User < ApplicationRecord
  has_many :dogs
  has_many :dog_walkers
  has_many :owners
  has_many :dog_walkers
end

class Dog < ApplicationRecord
  belongs_to :user
end

class DogWalker < ApplicationRecord
  belongs_to :user
end

class Owner < Application Record
  belongs_to :user
  has_many :dogs, through: :user
end

class DogTrainer < ApplicationRecord
  belong_to :user
end