diff options
Diffstat (limited to 'activerecord/lib/active_record/scoping/named.rb')
| -rw-r--r-- | activerecord/lib/active_record/scoping/named.rb | 66 |
1 files changed, 27 insertions, 39 deletions
diff --git a/activerecord/lib/active_record/scoping/named.rb b/activerecord/lib/active_record/scoping/named.rb index 0edc3f1dcc..75f31229b5 100644 --- a/activerecord/lib/active_record/scoping/named.rb +++ b/activerecord/lib/active_record/scoping/named.rb @@ -1,8 +1,6 @@ require 'active_support/core_ext/array' require 'active_support/core_ext/hash/except' require 'active_support/core_ext/kernel/singleton_class' -require 'active_support/core_ext/object/blank' -require 'active_support/core_ext/class/attribute' module ActiveRecord # = Active Record Named \Scopes @@ -11,33 +9,25 @@ module ActiveRecord extend ActiveSupport::Concern module ClassMethods - # Returns an anonymous \scope. + # Returns an <tt>ActiveRecord::Relation</tt> scope object. # - # posts = Post.scoped + # posts = Post.all # posts.size # Fires "select count(*) from posts" and returns the count # posts.each {|p| puts p.name } # Fires "select * from posts" and loads post objects # - # fruits = Fruit.scoped + # fruits = Fruit.all # fruits = fruits.where(:color => '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. - # # You can define a \scope that applies to all finders using # ActiveRecord::Base.default_scope. - def scoped(options = nil) - if options - scoped.apply_finder_options(options) + def all + if current_scope + current_scope.clone else - if current_scope - current_scope.clone - else - scope = relation.clone - scope.default_scoped = true - scope - end + scope = relation + scope.default_scoped = true + scope end end @@ -48,7 +38,7 @@ module ActiveRecord if current_scope current_scope.scope_for_create else - scope = relation.clone + scope = relation scope.default_scoped = true scope.scope_for_create end @@ -171,29 +161,27 @@ module ActiveRecord # Article.published.featured.latest_article # Article.featured.titles - def scope(name, scope_options = {}) - name = name.to_sym - valid_scope_name?(name) - extension = Module.new(&Proc.new) if block_given? - - scope_proc = lambda do |*args| - options = scope_options.respond_to?(:call) ? unscoped { scope_options.call(*args) } : scope_options - options = scoped.apply_finder_options(options) if options.is_a?(Hash) - - relation = scoped.merge(options) + def scope(name, body, &block) + extension = Module.new(&block) if block - extension ? relation.extending(extension) : relation + # Check body.is_a?(Relation) to prevent the relation actually being + # loaded by respond_to? + if body.is_a?(Relation) || !body.respond_to?(:call) + ActiveSupport::Deprecation.warn( + "Using #scope without passing a callable object is deprecated. For " \ + "example `scope :red, where(color: 'red')` should be changed to " \ + "`scope :red, -> { where(color: 'red') }`. There are numerous gotchas " \ + "in the former usage and it makes the implementation more complicated " \ + "and buggy. (If you prefer, you can just define a class method named " \ + "`self.red`.)" + ) end - singleton_class.send(:redefine_method, name, &scope_proc) - end - - protected + singleton_class.send(:define_method, name) do |*args| + options = body.respond_to?(:call) ? unscoped { body.call(*args) } : body + relation = all.merge(options) - def valid_scope_name?(name) - if respond_to?(name, true) - logger.warn "Creating scope :#{name}. " \ - "Overwriting existing method #{self.name}.#{name}." + extension ? relation.extending(extension) : relation end end end |