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format fix for locking [Michael Koziarski]

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Add documentation for :dependent on associations. [robby@planetargon.com] Closes #4151


git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3822 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
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Michael Koziarski 2006-03-09 08:40:34 +00:00
parent 43398433e9
commit 57565b3506
3 changed files with 10 additions and 5 deletions
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2
activerecord/CHANGELOG
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@ -1,5 +1,7 @@
*SVN*
* Documentation fixes for :dependent [robby@planetargon.com]
* Allow set_fixture_class to take Classes instead of strings for a class in a module. Raise FixtureClassNotFound if a fixture can't load. [Rick Olson]
* Fix quoting of inheritance column for STI eager loading #4098 [Jonathan Viney <jonathan@bluewire.net.nz>]

11
activerecord/lib/active_record/associations.rb
View file

@ -310,10 +310,11 @@ module ActiveRecord
# * <tt>:foreign_key</tt> - specify the foreign key used for the association. By default this is guessed to be the name
# of this class in lower-case and "_id" suffixed. So a +Person+ class that makes a has_many association will use "person_id"
# as the default foreign_key.
# * <tt>:dependent</tt> - if set to :destroy (or true) all the associated objects are destroyed
# * <tt>:dependent</tt> - if set to :destroy all the associated objects are destroyed
# alongside this object by calling their destroy method. If set to :delete_all all associated
# objects are deleted *without* calling their destroy method. If set to :nullify all associated
# objects' foreign keys are set to NULL *without* calling their save callbacks.
# NOTE: :dependent => true is deprecated and has been replaced with :dependent => :destroy.
# May not be set if :exclusively_dependent is also set.
# * <tt>:exclusively_dependent</tt> - Deprecated; equivalent to :dependent => :delete_all. If set to true all
# the associated object are deleted in one SQL statement without having their
@ -336,7 +337,8 @@ module ActiveRecord
# has_many :comments, :order => "posted_on"
# has_many :comments, :include => :author
# has_many :people, :class_name => "Person", :conditions => "deleted = 0", :order => "name"
# has_many :tracks, :order => "position", :dependent => true
# has_many :tracks, :order => "position", :dependent => :destroy
# has_many :comments, :dependent => :nullify
# has_many :subscribers, :class_name => "Person", :finder_sql =>
# 'SELECT DISTINCT people.* ' +
# 'FROM people p, post_subscriptions ps ' +
@ -396,7 +398,8 @@ module ActiveRecord
# * <tt>:include</tt> - specify second-order associations that should be eager loaded when this object is loaded.
#
# Option examples:
# has_one :credit_card, :dependent => true
# has_one :credit_card, :dependent => :destroy # destroys the associated credit card
# has_one :credit_card, :dependent => :nullify # updates the associated records foriegn key value to null rather than destroying it
# has_one :last_comment, :class_name => "Comment", :order => "posted_on"
# has_one :project_manager, :class_name => "Person", :conditions => "role = 'project_manager'"
def has_one(association_id, options = {})
@ -813,7 +816,7 @@ module ActiveRecord
when nil, false
# pass
else
raise ArgumentError, 'The :dependent option expects either true, :destroy, :delete_all, or :nullify'
raise ArgumentError, 'The :dependent option expects either :destroy, :delete_all, or :nullify'
end
end