activerecord/lib/active_record/dynamic_scope_match.rb @@ -1,5 +1,7 @@ *2.3.0/3.0* +* Added dynamic scopes ala dynamic finders #1648 [Yaroslav Markin] + * Fixed that ActiveRecord::Base#new_record? should return false (not nil) for existing records #1219 [Yaroslav Markin] * I18n the word separator for error messages. Introduces the activerecord.errors.format.separator translation key. #1294 [Akira Matsuda] activerecord/CHANGELOG @@ -51,6 +51,7 @@ module ActiveRecord autoload :Callbacks, 'active_record/callbacks' autoload :Dirty, 'active_record/dirty' autoload :DynamicFinderMatch, 'active_record/dynamic_finder_match' + autoload :DynamicScopeMatch, 'active_record/dynamic_scope_match' autoload :Migration, 'active_record/migration' autoload :Migrator, 'active_record/migration' autoload :NamedScope, 'active_record/named_scope' activerecord/lib/active_record.rb @@ -1456,7 +1456,10 @@ module ActiveRecord #:nodoc: def respond_to?(method_id, include_private = false) if match = DynamicFinderMatch.match(method_id) return true if all_attributes_exists?(match.attribute_names) + elsif match = DynamicScopeMatch.match(method_id) + return true if all_attributes_exists?(match.attribute_names) end + super end @@ -1809,7 +1812,11 @@ module ActiveRecord #:nodoc: # This also enables you to initialize a record if it is not found, such as find_or_initialize_by_amount(amount) # or find_or_create_by_user_and_password(user, password). # - # Each dynamic finder or initializer/creator is also defined in the class after it is first invoked, so that future + # Also enables dynamic scopes like scoped_by_user_name(user_name) and scoped_by_user_name_and_password(user_name, password) that + # are turned into scoped(:conditions => ["user_name = ?", user_name]) and scoped(:conditions => ["user_name = ? AND password = ?", user_name, password]) + # respectively. + # + # Each dynamic finder, scope or initializer/creator is also defined in the class after it is first invoked, so that future # attempts to use it do not run through method_missing. def method_missing(method_id, *arguments, &block) if match = DynamicFinderMatch.match(method_id) @@ -1868,6 +1875,22 @@ module ActiveRecord #:nodoc: }, __FILE__, __LINE__ send(method_id, *arguments, &block) end + elsif match = DynamicScopeMatch.match(method_id) + attribute_names = match.attribute_names + super unless all_attributes_exists?(attribute_names) + if match.scope? + self.class_eval %{ + def self.#{method_id}(*args) # def self.scoped_by_user_name_and_password(*args) + options = args.extract_options! # options = args.extract_options! + attributes = construct_attributes_from_arguments( # attributes = construct_attributes_from_arguments( + [:#{attribute_names.join(',:')}], args # [:user_name, :password], args + ) # ) + # + scoped(:conditions => attributes) # scoped(:conditions => attributes) + end # end + }, __FILE__, __LINE__ + send(method_id, *arguments) + end else super end activerecord/lib/active_record/base.rb @@ -278,3 +278,23 @@ class NamedScopeTest < ActiveRecord::TestCase assert_equal post.comments.size, Post.scoped(:joins => join).scoped(:joins => join, :conditions => "posts.id = #{post.id}").size end end + +class DynamicScopeMatchTest < ActiveRecord::TestCase + def test_scoped_by_no_match + assert_nil ActiveRecord::DynamicScopeMatch.match("not_scoped_at_all") + end + + def test_scoped_by + match = ActiveRecord::DynamicScopeMatch.match("scoped_by_age_and_sex_and_location") + assert_not_nil match + assert match.scope? + assert_equal %w(age sex location), match.attribute_names + end +end + +class DynamicScopeTest < ActiveRecord::TestCase + def test_dynamic_scope + assert_equal Post.scoped_by_author_id(1).find(1), Post.find(1) + assert_equal Post.scoped_by_author_id_and_title(1, "Welcome to the weblog").first, Post.find(:first, :conditions => { :author_id => 1, :title => "Welcome to the weblog"}) + end +end activerecord/test/cases/named_scope_test.rb 1fb275541a58e6a2100261c6117e96e6c014cc6c Yaroslav Markin yaroslav yaroslav@markin.net http://github.com/rails/rails/commit/66ee5890c5f21995b7fe0c486547f1287afe2b55 66ee5890c5f21995b7fe0c486547f1287afe2b55 2008-12-28T11:52:46-08:00 2008-12-28T11:25:55-08:00 Introduce dynamic scopes for ActiveRecord: you can now use class methods like scoped_by_user_name(user_name) and scoped_by_user_name_and_password(user_name, password) that will use the scoped method with attributes you supply. [#1648 state:committed] Signed-off-by: David Heinemeier Hansson <david@loudthinking.com> 81b44888712ff3ea7093209b3235858948354d25 David Heinemeier Hansson dhh david@loudthinking.com