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require 'ostruct'
module DeveloperProjectsAssociationExtension
def find_most_recent
order("id DESC").first
end
end
module DeveloperProjectsAssociationExtension2
def find_least_recent
order("id ASC").first
end
end
class Developer < ActiveRecord::Base
has_and_belongs_to_many :projects do
def find_most_recent
order("id DESC").first
end
end
has_and_belongs_to_many :projects_extended_by_name,
-> { extending(DeveloperProjectsAssociationExtension) },
:class_name => "Project",
:join_table => "developers_projects",
:association_foreign_key => "project_id"
has_and_belongs_to_many :projects_extended_by_name_twice,
-> { extending(DeveloperProjectsAssociationExtension, DeveloperProjectsAssociationExtension2) },
:class_name => "Project",
:join_table => "developers_projects",
:association_foreign_key => "project_id"
has_and_belongs_to_many :projects_extended_by_name_and_block,
-> { extending(DeveloperProjectsAssociationExtension) },
:class_name => "Project",
:join_table => "developers_projects",
:association_foreign_key => "project_id" do
def find_least_recent
order("id ASC").first
end
end
has_and_belongs_to_many :special_projects, :join_table => 'developers_projects', :association_foreign_key => 'project_id'
has_many :audit_logs
scope :jamises, -> { where(: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
after_find :track_instance_count
cattr_accessor :instance_count
def track_instance_count
self.class.instance_count ||= 0
self.class.instance_count += 1
end
private :track_instance_count
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
class DeveloperWithSelect < ActiveRecord::Base
self.table_name = 'developers'
default_scope { select('name') }
end
class DeveloperWithIncludes < ActiveRecord::Base
self.table_name = 'developers'
has_many :audit_logs, :foreign_key => :developer_id
default_scope { includes(:audit_logs) }
end
class DeveloperOrderedBySalary < ActiveRecord::Base
self.table_name = 'developers'
default_scope { order('salary DESC') }
scope :by_name, -> { order('name DESC') }
end
class DeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
default_scope { where("name = 'David'") }
end
class LazyLambdaDeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
default_scope lambda { where(:name => 'David') }
end
class LazyBlockDeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
default_scope { where(:name => 'David') }
end
class CallableDeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
default_scope OpenStruct.new(:call => where(:name => 'David'))
end
class ClassMethodDeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
def self.default_scope
where(:name => 'David')
end
end
class ClassMethodReferencingScopeDeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
scope :david, -> { where(:name => 'David') }
def self.default_scope
david
end
end
class LazyBlockReferencingScopeDeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
scope :david, -> { where(:name => 'David') }
default_scope { david }
end
class DeveloperCalledJamis < ActiveRecord::Base
self.table_name = 'developers'
default_scope { where(:name => 'Jamis') }
scope :poor, -> { where('salary < 150000') }
end
class PoorDeveloperCalledJamis < ActiveRecord::Base
self.table_name = 'developers'
default_scope -> { where(:name => 'Jamis', :salary => 50000) }
end
class InheritedPoorDeveloperCalledJamis < DeveloperCalledJamis
self.table_name = 'developers'
default_scope -> { where(:salary => 50000) }
end
class MultiplePoorDeveloperCalledJamis < ActiveRecord::Base
self.table_name = 'developers'
default_scope -> { where(:name => 'Jamis') }
default_scope -> { where(:salary => 50000) }
end
module SalaryDefaultScope
extend ActiveSupport::Concern
included { default_scope { where(:salary => 50000) } }
end
class ModuleIncludedPoorDeveloperCalledJamis < DeveloperCalledJamis
self.table_name = 'developers'
include SalaryDefaultScope
end
class EagerDeveloperWithDefaultScope < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects, -> { order('projects.id') }, :foreign_key => 'developer_id', :join_table => 'developers_projects'
default_scope { includes(:projects) }
end
class EagerDeveloperWithClassMethodDefaultScope < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects, -> { order('projects.id') }, :foreign_key => 'developer_id', :join_table => 'developers_projects'
def self.default_scope
includes(:projects)
end
end
class EagerDeveloperWithLambdaDefaultScope < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects, -> { order('projects.id') }, :foreign_key => 'developer_id', :join_table => 'developers_projects'
default_scope lambda { includes(:projects) }
end
class EagerDeveloperWithBlockDefaultScope < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects, -> { order('projects.id') }, :foreign_key => 'developer_id', :join_table => 'developers_projects'
default_scope { includes(:projects) }
end
class EagerDeveloperWithCallableDefaultScope < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects, -> { order('projects.id') }, :foreign_key => 'developer_id', :join_table => 'developers_projects'
default_scope OpenStruct.new(:call => includes(:projects))
end
class ThreadsafeDeveloper < ActiveRecord::Base
self.table_name = 'developers'
def self.default_scope
sleep 0.05 if Thread.current[:long_default_scope]
limit(1)
end
end
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