User model example

user_model_example.rb

class User < ActiveRecord::Model
  
  default_scope { where(state: 'active') }
  
  scope :inactive, -> { where(active: false) }
  
  validates_presence_of :first_name, :last_name, :email, :password, :invitation_token
  
  validates :first_name, length: { minimum: 2 }
  validates :last_name, length: { minimum: 2 }
  validates :bio, length: { maximum: 500 }
  validates :email, uniqueness: true
  validates :password, length: { in: 6..20 }
  validates :invitation_token, length: { is: 10 }
  
  has_many :posts
  has_many :comments

  before_create :assign_object_token
  before_destroy :last_words
  
  def full_name
    ...
  end
  
  private
  
  def last_words
    ...
  end
    
  def assign_object_token
    ...
  end

end