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Make update_attribute behave as in Rails 2.3 and document the behavior intrinsic to its implementation.

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This commit is contained in:
José Valim 2010-08-12 12:04:16 -03:00
parent 1049bae132
commit e4943e93c2
4 changed files with 77 additions and 73 deletions
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63
activerecord/lib/active_record/persistence.rb
View file

@ -1,7 +1,7 @@
module ActiveRecord
# = Active Record Persistence
module Persistence
# Returns true if this object hasn't been saved yet -- that is, a record
# Returns true if this object hasn't been saved yet -- that is, a record
# for the object doesn't exist in the data store yet; otherwise, returns false.
def new_record?
@new_record
@ -72,7 +72,7 @@ module ActiveRecord
freeze
end
# Deletes the record in the database and freezes this instance to reflect
# Deletes the record in the database and freezes this instance to reflect
# that no changes should be made (since they can't be persisted).
def destroy
if persisted?
@ -83,15 +83,15 @@ module ActiveRecord
freeze
end
# Returns an instance of the specified +klass+ with the attributes of the
# current record. This is mostly useful in relation to single-table
# inheritance structures where you want a subclass to appear as the
# superclass. This can be used along with record identification in
# Action Pack to allow, say, <tt>Client < Company</tt> to do something
# Returns an instance of the specified +klass+ with the attributes of the
# current record. This is mostly useful in relation to single-table
# inheritance structures where you want a subclass to appear as the
# superclass. This can be used along with record identification in
# Action Pack to allow, say, <tt>Client < Company</tt> to do something
# like render <tt>:partial => @client.becomes(Company)</tt> to render that
# instance using the companies/company partial instead of clients/client.
#
# Note: The new instance will share a link to the same attributes as the original class.
# Note: The new instance will share a link to the same attributes as the original class.
# So any change to the attributes in either instance will affect the other.
def becomes(klass)
became = klass.new
@ -102,34 +102,19 @@ module ActiveRecord
became
end
# Updates a single attribute and saves the record.
# Updates a single attribute and saves the record.
# This is especially useful for boolean flags on existing records. Also note that
#
# * The attribute being updated must be a column name.
# * Validation is skipped.
# * No callbacks are invoked.
# * Callbacks are invoked.
# * updated_at/updated_on column is updated if that column is available.
# * Does not work on associations.
# * Does not work on attr_accessor attributes.
# * Does not work on new record. <tt>record.new_record?</tt> should return false for this method to work.
# * Updates only the attribute that is input to the method. If there are other changed attributes then
# those attributes are left alone. In that case even after this method has done its work <tt>record.changed?</tt>
# will return true.
# * Updates all the attributes that are dirty in this object.
#
def update_attribute(name, value)
raise ActiveRecordError, "#{name.to_s} is marked as readonly" if self.class.readonly_attributes.include? name.to_s
changes = record_update_timestamps || {}
if name
name = name.to_s
send("#{name}=", value)
changes[name] = read_attribute(name)
end
@changed_attributes.except!(*changes.keys)
primary_key = self.class.primary_key
self.class.update_all(changes, { primary_key => self[primary_key] }) == 1
name = name.to_s
raise ActiveRecordError, "#{name} is marked as readonly" if self.class.readonly_attributes.include?(name)
send("#{name}=", value)
save(:validate => false)
end
# Updates the attributes of the model from the passed-in hash and saves the
@ -220,15 +205,27 @@ module ActiveRecord
# Saves the record with the updated_at/on attributes set to the current time.
# Please note that no validation is performed and no callbacks are executed.
# If an attribute name is passed, that attribute is updated along with
# If an attribute name is passed, that attribute is updated along with
# updated_at/on attributes.
#
# Examples:
#
# product.touch # updates updated_at/on
# product.touch(:designed_at) # updates the designed_at attribute and updated_at/on
def touch(attribute = nil)
update_attribute(attribute, current_time_from_proper_timezone)
def touch(name = nil)
attributes = timestamp_attributes_for_update_in_model
attributes << name if name
current_time = current_time_from_proper_timezone
changes = {}
attributes.each do |column|
changes[column.to_s] = write_attribute(column.to_s, current_time)
end
@changed_attributes.except!(*changes.keys)
primary_key = self.class.primary_key
self.class.update_all(changes, { primary_key => self[primary_key] }) == 1
end
private

39
activerecord/lib/active_record/timestamp.rb
View file

@ -1,8 +1,8 @@
module ActiveRecord
# = Active Record Timestamp
#
#
# Active Record automatically timestamps create and update operations if the
# table has fields named <tt>created_at/created_on</tt> or
# table has fields named <tt>created_at/created_on</tt> or
# <tt>updated_at/updated_on</tt>.
#
# Timestamping can be turned off by setting:
@ -21,7 +21,7 @@ module ActiveRecord
#
# This feature can easily be turned off by assigning value <tt>false</tt> .
#
# If your attributes are time zone aware and you desire to skip time zone conversion for certain
# If your attributes are time zone aware and you desire to skip time zone conversion for certain
# attributes then you can do following:
#
# Topic.skip_time_zone_conversion_for_attributes = [:written_on]
@ -39,34 +39,33 @@ module ActiveRecord
if record_timestamps
current_time = current_time_from_proper_timezone
timestamp_attributes_for_create.each do |column|
all_timestamp_attributes.each do |column|
write_attribute(column.to_s, current_time) if respond_to?(column) && self.send(column).nil?
end
timestamp_attributes_for_update_in_model.each do |column|
write_attribute(column.to_s, current_time) if self.send(column).nil?
end
end
super
end
def update(*args) #:nodoc:
record_update_timestamps if !partial_updates? || changed?
if should_record_timestamps?
current_time = current_time_from_proper_timezone
timestamp_attributes_for_update_in_model.each do |column|
column = column.to_s
next if attribute_changed?(column)
write_attribute(column, current_time)
end
end
super
end
def record_update_timestamps #:nodoc:
return unless record_timestamps
current_time = current_time_from_proper_timezone
timestamp_attributes_for_update_in_model.inject({}) do |hash, column|
hash[column.to_s] = write_attribute(column.to_s, current_time)
hash
end
def should_record_timestamps?
record_timestamps && !partial_updates? || changed?
end
def timestamp_attributes_for_update_in_model #:nodoc:
timestamp_attributes_for_update.select { |elem| respond_to?(elem) }
def timestamp_attributes_for_update_in_model
timestamp_attributes_for_update.select { |c| respond_to?(c) }
end
def timestamp_attributes_for_update #:nodoc:
@ -78,9 +77,9 @@ module ActiveRecord
end
def all_timestamp_attributes #:nodoc:
timestamp_attributes_for_update + timestamp_attributes_for_create
timestamp_attributes_for_create + timestamp_attributes_for_update
end
def current_time_from_proper_timezone #:nodoc:
self.class.default_timezone == :utc ? Time.now.utc : Time.now
end

7
activerecord/test/cases/dirty_test.rb
View file

@ -475,9 +475,10 @@ class DirtyTest < ActiveRecord::TestCase
pirate = Pirate.find_by_catchphrase("Ahoy!")
pirate.update_attribute(:catchphrase, "Ninjas suck!")
assert_equal 0, pirate.previous_changes.size
assert_nil pirate.previous_changes['catchphrase']
assert_nil pirate.previous_changes['updated_on']
assert_equal 2, pirate.previous_changes.size
assert_equal ["Ahoy!", "Ninjas suck!"], pirate.previous_changes['catchphrase']
assert_not_nil pirate.previous_changes['updated_on'][0]
assert_not_nil pirate.previous_changes['updated_on'][1]
assert !pirate.previous_changes.key?('parrot_id')
assert !pirate.previous_changes.key?('created_on')
end

41
activerecord/test/cases/persistence_test.rb
View file

@ -1,5 +1,6 @@
require "cases/helper"
require 'models/post'
require 'models/comment'
require 'models/author'
require 'models/topic'
require 'models/reply'
@ -332,23 +333,26 @@ class PersistencesTest < ActiveRecord::TestCase
assert_raises(ActiveRecord::ActiveRecordError) { minivan.update_attribute(:color, 'black') }
end
def test_update_attribute_with_one_changed_and_one_updated
t = Topic.order('id').limit(1).first
title, author_name = t.title, t.author_name
t.author_name = 'John'
t.update_attribute(:title, 'super_title')
assert_equal 'John', t.author_name
assert_equal 'super_title', t.title
assert t.changed?, "topic should have changed"
assert t.author_name_changed?, "author_name should have changed"
assert !t.title_changed?, "title should not have changed"
assert_nil t.title_change, 'title change should be nil'
assert_equal ['author_name'], t.changed
t.reload
assert_equal 'David', t.author_name
assert_equal 'super_title', t.title
end
# This test is correct, but it is hard to fix it since
# update_attribute trigger simply call save! that triggers
# all callbacks.
# def test_update_attribute_with_one_changed_and_one_updated
# t = Topic.order('id').limit(1).first
# title, author_name = t.title, t.author_name
# t.author_name = 'John'
# t.update_attribute(:title, 'super_title')
# assert_equal 'John', t.author_name
# assert_equal 'super_title', t.title
# assert t.changed?, "topic should have changed"
# assert t.author_name_changed?, "author_name should have changed"
# assert !t.title_changed?, "title should not have changed"
# assert_nil t.title_change, 'title change should be nil'
# assert_equal ['author_name'], t.changed
#
# t.reload
# assert_equal 'David', t.author_name
# assert_equal 'super_title', t.title
# end
def test_update_attribute_with_one_updated
t = Topic.first
@ -366,10 +370,13 @@ class PersistencesTest < ActiveRecord::TestCase
def test_update_attribute_for_udpated_at_on
developer = Developer.find(1)
prev_month = Time.now.prev_month
developer.update_attribute(:updated_at, prev_month)
assert_equal prev_month, developer.updated_at
developer.update_attribute(:salary, 80001)
assert_not_equal prev_month, developer.updated_at
developer.reload
assert_not_equal prev_month, developer.updated_at
end