5.5. CRUD basics

DataMapper as an ORM is intended to create, retrieve, update, and delete records from a repository through interactions with Ruby objects. This means that we don’t have to write SQL statements through the normal course of usage. In fact, DataMapper’s versatility, intelligence, and performance will probably leave you never needing to write a single SQL statement in your entire application.

Throughout this section, we will assume the existence of the following model:

class BlogEntry
  include DataMapper::Resource

  property :id, Serial
  property :live, TrueClass
  property :title, String
  property :text, Text
end