diff options
Diffstat (limited to 'activerecord/lib/active_record/named_scope.rb')
| -rw-r--r-- | activerecord/lib/active_record/named_scope.rb | 46 |
1 files changed, 30 insertions, 16 deletions
diff --git a/activerecord/lib/active_record/named_scope.rb b/activerecord/lib/active_record/named_scope.rb index 3d8f4a030b..c010dac64e 100644 --- a/activerecord/lib/active_record/named_scope.rb +++ b/activerecord/lib/active_record/named_scope.rb @@ -4,11 +4,12 @@ require 'active_support/core_ext/kernel/singleton_class' require 'active_support/core_ext/object/blank' module ActiveRecord + # = Active Record Named \Scopes module NamedScope extend ActiveSupport::Concern module ClassMethods - # Returns an anonymous scope. + # Returns an anonymous \scope. # # posts = Post.scoped # posts.size # Fires "select count(*) from posts" and returns the count @@ -18,14 +19,15 @@ module ActiveRecord # fruits = fruits.where(:colour => 'red') if options[:red_only] # fruits = fruits.limit(10) if limited? # - # Anonymous \scopes tend to be useful when procedurally generating complex queries, where passing - # intermediate values (scopes) around as first-class objects is convenient. + # Anonymous \scopes tend to be useful when procedurally generating complex + # queries, where passing intermediate values (\scopes) around as first-class + # objects is convenient. # - # You can define a scope that applies to all finders using ActiveRecord::Base.default_scope. - def scoped(options = {}, &block) + # You can define a \scope that applies to all finders using + # ActiveRecord::Base.default_scope. + def scoped(options = nil) if options.present? - relation = scoped.apply_finder_options(options) - block_given? ? relation.extending(Module.new(&block)) : relation + scoped.apply_finder_options(options) else current_scoped_methods ? unscoped.merge(current_scoped_methods) : unscoped.clone end @@ -35,7 +37,7 @@ module ActiveRecord read_inheritable_attribute(:scopes) || write_inheritable_attribute(:scopes, {}) end - # Adds a class method for retrieving and querying objects. A scope represents a narrowing of a database query, + # Adds a class method for retrieving and querying objects. A \scope represents a narrowing of a database query, # such as <tt>where(:color => :red).select('shirts.*').includes(:washing_instructions)</tt>. # # class Shirt < ActiveRecord::Base @@ -85,18 +87,22 @@ module ActiveRecord # end def scope(name, scope_options = {}, &block) name = name.to_sym + valid_scope_name?(name) - if !scopes[name] && respond_to?(name, true) - logger.warn "Creating scope :#{name}. " \ - "Overwriting existing method #{self.name}.#{name}." - end + extension = Module.new(&block) if block_given? scopes[name] = lambda do |*args| options = scope_options.is_a?(Proc) ? scope_options.call(*args) : scope_options - relation = scoped - relation = options.is_a?(Hash) ? relation.apply_finder_options(options) : scoped.merge(options) if options - block_given? ? relation.extending(Module.new(&block)) : relation + relation = if options.is_a?(Hash) + scoped.apply_finder_options(options) + elsif options + scoped.merge(options) + else + scoped + end + + extension ? relation.extending(extension) : relation end singleton_class.send :define_method, name, &scopes[name] @@ -106,7 +112,15 @@ module ActiveRecord ActiveSupport::Deprecation.warn("Base.named_scope has been deprecated, please use Base.scope instead", caller) scope(*args, &block) end - end + protected + + def valid_scope_name?(name) + if !scopes[name] && respond_to?(name, true) + logger.warn "Creating scope :#{name}. " \ + "Overwriting existing method #{self.name}.#{name}." + end + end + end end end |