require "cases/helper"
class CallbackDeveloper < ActiveRecord::Base
set_table_name 'developers'
class << self
def callback_string(callback_method)
"history << [#{callback_method.to_sym.inspect}, :string]"
end
def callback_proc(callback_method)
Proc.new { |model| model.history << [callback_method, :proc] }
end
def define_callback_method(callback_method)
define_method("#{callback_method}_method") do |model|
model.history << [callback_method, :method]
end
end
def callback_object(callback_method)
klass = Class.new
klass.send(:define_method, callback_method) do |model|
model.history << [callback_method, :object]
end
klass.new
end
end
ActiveRecord::Callbacks::CALLBACKS.each do |callback_method|
callback_method_sym = callback_method.to_sym
define_callback_method(callback_method_sym)
send(callback_method, callback_method_sym)
send(callback_method, callback_string(callback_method_sym))
send(callback_method, callback_proc(callback_method_sym))
send(callback_method, callback_object(callback_method_sym))
send(callback_method) { |model| model.history << [callback_method_sym, :block] }
end
def history
@history ||= []
end
# after_initialize and after_find are invoked only if instance methods have been defined.
def after_initialize
end
def after_find
end
end
class ParentDeveloper < ActiveRecord::Base
set_table_name 'developers'
attr_accessor :after_save_called
before_validation {|record| record.after_save_called = true}
end
class ChildDeveloper < ParentDeveloper
end
class RecursiveCallbackDeveloper < ActiveRecord::Base
set_table_name 'developers'
before_save :on_before_save
after_save :on_after_save
attr_reader :on_before_save_called, :on_after_save_called
def on_before_save
@on_before_save_called ||= 0
@on_before_save_called += 1
save unless @on_before_save_called > 1
end
def on_after_save
@on_after_save_called ||= 0
@on_after_save_called += 1
save unless @on_after_save_called > 1
end
end
class ImmutableDeveloper < ActiveRecord::Base
set_table_name 'developers'
validates_inclusion_of :salary, :in => 50000..200000
before_save :cancel
before_destroy :cancel
def cancelled?
@cancelled == true
end
private
def cancel
@cancelled = true
false
end
end
class ImmutableMethodDeveloper < ActiveRecord::Base
set_table_name 'developers'
validates_inclusion_of :salary, :in => 50000..200000
def cancelled?
@cancelled == true
end
def before_save
@cancelled = true
false
end
def before_destroy
@cancelled = true
false
end
end
class CallbackCancellationDeveloper < ActiveRecord::Base
set_table_name 'developers'
attr_reader :after_save_called, :after_create_called, :after_update_called, :after_destroy_called
attr_accessor :cancel_before_save, :cancel_before_create, :cancel_before_update, :cancel_before_destroy
def before_save; !@cancel_before_save; end
def before_create; !@cancel_before_create; end
def before_update; !@cancel_before_update; end
def before_destroy; !@cancel_before_destroy; end
def after_save; @after_save_called = true; end
def after_update; @after_update_called = true; end
def after_create; @after_create_called = true; end
def after_destroy; @after_destroy_called = true; end
end
class CallbacksTest < ActiveRecord::TestCase
fixtures :developers
def test_initialize
david = CallbackDeveloper.new
assert_equal [
[ :after_initialize, :string ],
[ :after_initialize, :proc ],
[ :after_initialize, :object ],
[ :after_initialize, :block ],
], david.history
end
def test_find
david = CallbackDeveloper.find(1)
assert_equal [
[ :after_find, :string ],
[ :after_find, :proc ],
[ :after_find, :object ],
[ :after_find, :block ],
[ :after_initialize, :string ],
[ :after_initialize, :proc ],
[ :after_initialize, :object ],
[ :after_initialize, :block ],
], david.history
end
def test_new_valid?
david = CallbackDeveloper.new
david.valid?
assert_equal [
[ :after_initialize, :string ],
[ :after_initialize, :proc ],
[ :after_initialize, :object ],
[ :after_initialize, :block ],
[ :before_validation, :string ],
[ :before_validation, :proc ],
[ :before_validation, :object ],
[ :before_validation, :block ],
[ :before_validation_on_create, :string ],
[ :before_validation_on_create, :proc ],
[ :before_validation_on_create, :object ],
[ :before_validation_on_create, :block ],
[ :after_validation, :string ],
[ :after_validation, :proc ],
[ :after_validation, :object ],
[ :after_validation, :block ],
[ :after_validation_on_create, :string ],
[ :after_validation_on_create, :proc ],
[ :after_validation_on_create, :object ],
[ :after_validation_on_create, :block ]
], david.history
end
def test_existing_valid?
david = CallbackDeveloper.find(1)
david.valid?
assert_equal [
[ :after_find, :string ],
[ :after_find, :proc ],
[ :after_find, :object ],
[ :after_find, :block ],
[ :after_initialize, :string ],
[ :after_initialize, :proc ],
[ :after_initialize, :object ],
[ :after_initialize, :block ],
[ :before_validation, :string ],
[ :before_validation, :proc ],
[ :before_validation, :object ],
[ :before_validation, :block ],
[ :before_validation_on_update, :string ],
[ :before_validation_on_update, :proc ],
[ :before_validation_on_update, :object ],
[ :before_validation_on_update, :block ],
[ :after_validation, :string ],
[ :after_validation, :proc ],
[ :after_validation, :object ],
[ :after_validation, :block ],
[ :after_validation_on_update, :string ],
[ :after_validation_on_update, :proc ],
[ :after_validation_on_update, :object ],
[ :after_validation_on_update, :block ]
], david.history
end
def test_create
david = CallbackDeveloper.create('name' => 'David', 'salary' => 1000000)
assert_equal [
[ :after_initialize, :string ],
[ :after_initialize, :proc ],
[ :after_initialize, :object ],
[ :after_initialize, :block ],
[ :before_validation, :string ],
[ :before_validation, :proc ],
[ :before_validation, :object ],
[ :before_validation, :block ],
[ :before_validation_on_create, :string ],
[ :before_validation_on_create, :proc ],
[ :before_validation_on_create, :object ],
[ :before_validation_on_create, :block ],
[ :after_validation, :string ],
[ :after_validation, :proc ],
[ :after_validation, :object ],
[ :after_validation, :block ],
[ :after_validation_on_create, :string ],
[ :after_validation_on_create, :proc ],
[ :after_validation_on_create, :object ],
[ :after_validation_on_create, :block ],
[ :before_save, :string ],
[ :before_save, :proc ],
[ :before_save, :object ],
[ :before_save, :block ],
[ :before_create, :string ],
[ :before_create, :proc ],
[ :before_create, :object ],
[ :before_create, :block ],
[ :after_create, :string ],
[ :after_create, :proc ],
[ :after_create, :object ],
[ :after_create, :block ],
[ :after_save, :string ],
[ :after_save, :proc ],
[ :after_save, :object ],
[ :after_save, :block ]
], david.history
end
def test_save
david = CallbackDeveloper.find(1)
david.save
assert_equal [
[ :after_find, :string ],
[ :after_find, :proc ],
[ :after_find, :object ],
[ :after_find, :block ],
[ :after_initialize, :string ],
[ :after_initialize, :proc ],
[ :after_initialize, :object ],
[ :after_initialize, :block ],
[ :before_validation, :string ],
[ :before_validation, :proc ],
[ :before_validation, :object ],
[ :before_validation, :block ],
[ :before_validation_on_update, :string ],
[ :before_validation_on_update, :proc ],
[ :before_validation_on_update, :object ],
[ :before_validation_on_update, :block ],
[ :after_validation, :string ],
[ :after_validation, :proc ],
[ :after_validation, :object ],
[ :after_validation, :block ],
[ :after_validation_on_update, :string ],
[ :after_validation_on_update, :proc ],
[ :after_validation_on_update, :object ],
[ :after_validation_on_update, :block ],
[ :before_save, :string ],
[ :before_save, :proc ],
[ :before_save, :object ],
[ :before_save, :block ],
[ :before_update, :string ],
[ :before_update, :proc ],
[ :before_update, :object ],
[ :before_update, :block ],
[ :after_update, :string ],
[ :after_update, :proc ],
[ :after_update, :object ],
[ :after_update, :block ],
[ :after_save, :string ],
[ :after_save, :proc ],
[ :after_save, :object ],
[ :after_save, :block ]
], david.history
end
def test_destroy
david = CallbackDeveloper.find(1)
david.destroy
assert_equal [
[ :after_find, :string ],
[ :after_find, :proc ],
[ :after_find, :object ],
[ :after_find, :block ],
[ :after_initialize, :string ],
[ :after_initialize, :proc ],
[ :after_initialize, :object ],
[ :after_initialize, :block ],
[ :before_destroy, :string ],
[ :before_destroy, :proc ],
[ :before_destroy, :object ],
[ :before_destroy, :block ],
[ :after_destroy, :string ],
[ :after_destroy, :proc ],
[ :after_destroy, :object ],
[ :after_destroy, :block ]
], david.history
end
def test_delete
david = CallbackDeveloper.find(1)
CallbackDeveloper.delete(david.id)
assert_equal [
[ :after_find, :string ],
[ :after_find, :proc ],
[ :after_find, :object ],
[ :after_find, :block ],
[ :after_initialize, :string ],
[ :after_initialize, :proc ],
[ :after_initialize, :object ],
[ :after_initialize, :block ],
], david.history
end
def test_before_save_returning_false
david = ImmutableDeveloper.find(1)
assert david.valid?
assert !david.save
assert_raises(ActiveRecord::RecordNotSaved) { david.save! }
david = ImmutableDeveloper.find(1)
david.salary = 10_000_000
assert !david.valid?
assert !david.save
assert_raises(ActiveRecord::RecordInvalid) { david.save! }
someone = CallbackCancellationDeveloper.find(1)
someone.cancel_before_save = true
assert someone.valid?
assert !someone.save
assert_save_callbacks_not_called(someone)
end
def test_before_create_returning_false
someone = CallbackCancellationDeveloper.new
someone.cancel_before_create = true
assert someone.valid?
assert !someone.save
assert_save_callbacks_not_called(someone)
end
def test_before_update_returning_false
someone = CallbackCancellationDeveloper.find(1)
someone.cancel_before_update = true
assert someone.valid?
assert !someone.save
assert_save_callbacks_not_called(someone)
end
def test_before_destroy_returning_false
david = ImmutableDeveloper.find(1)
assert !david.destroy
assert_not_nil ImmutableDeveloper.find_by_id(1)
someone = CallbackCancellationDeveloper.find(1)
someone.cancel_before_destroy = true
assert !someone.destroy
assert !someone.after_destroy_called
end
def assert_save_callbacks_not_called(someone)
assert !someone.after_save_called
assert !someone.after_create_called
assert !someone.after_update_called
end
private :assert_save_callbacks_not_called
def test_zzz_callback_returning_false # must be run last since we modify CallbackDeveloper
david = CallbackDeveloper.find(1)
CallbackDeveloper.before_validation proc { |model| model.history << [:before_validation, :returning_false]; return false }
CallbackDeveloper.before_validation proc { |model| model.history << [:before_validation, :should_never_get_here] }
david.save
assert_equal [
[ :after_find, :string ],
[ :after_find, :proc ],
[ :after_find, :object ],
[ :after_find, :block ],
[ :after_initialize, :string ],
[ :after_initialize, :proc ],
[ :after_initialize, :object ],
[ :after_initialize, :block ],
[ :before_validation, :string ],
[ :before_validation, :proc ],
[ :before_validation, :object ],
[ :before_validation, :block ],
[ :before_validation, :returning_false ]
], david.history
end
def test_inheritence_of_callbacks
parent = ParentDeveloper.new
assert !parent.after_save_called
parent.save
assert parent.after_save_called
child = ChildDeveloper.new
assert !child.after_save_called
child.save
assert child.after_save_called
end
end
