--- /dev/null
+module DeveloperProjectsAssociationExtension
+ def find_most_recent
+ find(:first, :order => "id DESC")
+ end
+end
+
+module DeveloperProjectsAssociationExtension2
+ def find_least_recent
+ find(:first, :order => "id ASC")
+ end
+end
+
+class Developer < ActiveRecord::Base
+ has_and_belongs_to_many :projects do
+ def find_most_recent
+ find(:first, :order => "id DESC")
+ end
+ end
+
+ has_and_belongs_to_many :projects_extended_by_name,
+ :class_name => "Project",
+ :join_table => "developers_projects",
+ :association_foreign_key => "project_id",
+ :extend => DeveloperProjectsAssociationExtension
+
+ has_and_belongs_to_many :projects_extended_by_name_twice,
+ :class_name => "Project",
+ :join_table => "developers_projects",
+ :association_foreign_key => "project_id",
+ :extend => [DeveloperProjectsAssociationExtension, DeveloperProjectsAssociationExtension2]
+
+ has_and_belongs_to_many :projects_extended_by_name_and_block,
+ :class_name => "Project",
+ :join_table => "developers_projects",
+ :association_foreign_key => "project_id",
+ :extend => DeveloperProjectsAssociationExtension do
+ def find_least_recent
+ find(:first, :order => "id ASC")
+ end
+ end
+
+ has_and_belongs_to_many :special_projects, :join_table => 'developers_projects', :association_foreign_key => 'project_id'
+
+ has_many :audit_logs
+
+ named_scope :jamises, :conditions => {:name => 'Jamis'}
+
+ validates_inclusion_of :salary, :in => 50000..200000
+ validates_length_of :name, :within => 3..20
+
+ before_create do |developer|
+ developer.audit_logs.build :message => "Computer created"
+ end
+
+ def log=(message)
+ audit_logs.build :message => message
+ end
+end
+
+class AuditLog < ActiveRecord::Base
+ belongs_to :developer, :validate => true
+ belongs_to :unvalidated_developer, :class_name => 'Developer'
+end
+
+DeveloperSalary = Struct.new(:amount)
+class DeveloperWithAggregate < ActiveRecord::Base
+ self.table_name = 'developers'
+ composed_of :salary, :class_name => 'DeveloperSalary', :mapping => [%w(salary amount)]
+end
+
+class DeveloperWithBeforeDestroyRaise < ActiveRecord::Base
+ self.table_name = 'developers'
+ has_and_belongs_to_many :projects, :join_table => 'developers_projects', :foreign_key => 'developer_id'
+ before_destroy :raise_if_projects_empty!
+
+ def raise_if_projects_empty!
+ raise if projects.empty?
+ end
+end