1 module DeveloperProjectsAssociationExtension
3 find(:first, :order => "id DESC")
7 module DeveloperProjectsAssociationExtension2
9 find(:first, :order => "id ASC")
13 class Developer < ActiveRecord::Base
14 has_and_belongs_to_many :projects do
16 find(:first, :order => "id DESC")
20 has_and_belongs_to_many :projects_extended_by_name,
21 :class_name => "Project",
22 :join_table => "developers_projects",
23 :association_foreign_key => "project_id",
24 :extend => DeveloperProjectsAssociationExtension
26 has_and_belongs_to_many :projects_extended_by_name_twice,
27 :class_name => "Project",
28 :join_table => "developers_projects",
29 :association_foreign_key => "project_id",
30 :extend => [DeveloperProjectsAssociationExtension, DeveloperProjectsAssociationExtension2]
32 has_and_belongs_to_many :projects_extended_by_name_and_block,
33 :class_name => "Project",
34 :join_table => "developers_projects",
35 :association_foreign_key => "project_id",
36 :extend => DeveloperProjectsAssociationExtension do
38 find(:first, :order => "id ASC")
42 has_and_belongs_to_many :special_projects, :join_table => 'developers_projects', :association_foreign_key => 'project_id'
46 validates_inclusion_of :salary, :in => 50000..200000
47 validates_length_of :name, :within => 3..20
49 before_create do |developer|
50 developer.audit_logs.build :message => "Computer created"
54 class AuditLog < ActiveRecord::Base
58 DeveloperSalary = Struct.new(:amount)
59 class DeveloperWithAggregate < ActiveRecord::Base
60 self.table_name = 'developers'
61 composed_of :salary, :class_name => 'DeveloperSalary', :mapping => [%w(salary amount)]
64 class DeveloperWithBeforeDestroyRaise < ActiveRecord::Base
65 self.table_name = 'developers'
66 has_and_belongs_to_many :projects, :join_table => 'developers_projects', :foreign_key => 'developer_id'
67 before_destroy :raise_if_projects_empty!
69 def raise_if_projects_empty!
70 raise if projects.empty?