Question

I am a newby in datamapper. I saw this code in this forum.

    class User
  include DataMapper::Resource

  property :id,                 Serial
  property :email,              String, :required => true, :unique => true, :format  => :email_address,
  property :name,               String
  property :hashed_password,    String
  property :salt,               String  
  property :created_at,         DateTime

  attr_accessor :password, :password_confirmation

property would mean that it defines the field in the database table..what does attr_accessor means..is it kind of field in the model but not in the database..

thanks

Answer 1

Yes, you are right. It is an attribute (a field) of your model, but not in your database. You could use such attributes to keep data that shouldn’t be saved in the database, but that somehow are useful for other objects in your application.

For example: you could define an accessor for a model field named “password”. Then when someone sets this value, you hash it and store it in the appropriate field in the database.