diff options
Diffstat (limited to 'activerecord/lib/active_record/scoping.rb')
| -rw-r--r-- | activerecord/lib/active_record/scoping.rb | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/activerecord/lib/active_record/scoping.rb b/activerecord/lib/active_record/scoping.rb index a8f5e96190..66a486ae0a 100644 --- a/activerecord/lib/active_record/scoping.rb +++ b/activerecord/lib/active_record/scoping.rb @@ -10,118 +10,6 @@ module ActiveRecord end module ClassMethods - # with_scope lets you apply options to inner block incrementally. It takes a hash and the keys must be - # <tt>:find</tt> or <tt>:create</tt>. <tt>:find</tt> parameter is <tt>Relation</tt> while - # <tt>:create</tt> parameters are an attributes hash. - # - # class Article < ActiveRecord::Base - # def self.create_with_scope - # with_scope(:find => where(:blog_id => 1), :create => { :blog_id => 1 }) do - # find(1) # => SELECT * from articles WHERE blog_id = 1 AND id = 1 - # a = create(1) - # a.blog_id # => 1 - # end - # end - # end - # - # In nested scopings, all previous parameters are overwritten by the innermost rule, with the exception of - # <tt>where</tt>, <tt>includes</tt>, and <tt>joins</tt> operations in <tt>Relation</tt>, which are merged. - # - # <tt>joins</tt> operations are uniqued so multiple scopes can join in the same table without table aliasing - # problems. If you need to join multiple tables, but still want one of the tables to be uniqued, use the - # array of strings format for your joins. - # - # class Article < ActiveRecord::Base - # def self.find_with_scope - # with_scope(:find => where(:blog_id => 1).limit(1), :create => { :blog_id => 1 }) do - # with_scope(:find => limit(10)) do - # all # => SELECT * from articles WHERE blog_id = 1 LIMIT 10 - # end - # with_scope(:find => where(:author_id => 3)) do - # all # => SELECT * from articles WHERE blog_id = 1 AND author_id = 3 LIMIT 1 - # end - # end - # end - # end - # - # You can ignore any previous scopings by using the <tt>with_exclusive_scope</tt> method. - # - # class Article < ActiveRecord::Base - # def self.find_with_exclusive_scope - # with_scope(:find => where(:blog_id => 1).limit(1)) do - # with_exclusive_scope(:find => limit(10)) do - # all # => SELECT * from articles LIMIT 10 - # end - # end - # end - # end - # - # *Note*: the +:find+ scope also has effect on update and deletion methods, like +update_all+ and +delete_all+. - def with_scope(scope = {}, action = :merge, &block) - # If another Active Record class has been passed in, get its current scope - scope = scope.current_scope if !scope.is_a?(Relation) && scope.respond_to?(:current_scope) - - previous_scope = self.current_scope - - if scope.is_a?(Hash) - # Dup first and second level of hash (method and params). - scope = scope.dup - scope.each do |method, params| - scope[method] = params.dup unless params == true - end - - scope.assert_valid_keys([ :find, :create ]) - relation = construct_finder_arel(scope[:find] || {}) - relation.default_scoped = true unless action == :overwrite - - if previous_scope && previous_scope.create_with_value && scope[:create] - scope_for_create = if action == :merge - previous_scope.create_with_value.merge(scope[:create]) - else - scope[:create] - end - - relation = relation.create_with(scope_for_create) - else - scope_for_create = scope[:create] - scope_for_create ||= previous_scope.create_with_value if previous_scope - relation = relation.create_with(scope_for_create) if scope_for_create - end - - scope = relation - end - - scope = previous_scope.merge(scope) if previous_scope && action == :merge - - self.current_scope = scope - begin - yield - ensure - self.current_scope = previous_scope - end - end - - protected - - # Works like with_scope, but discards any nested properties. - def with_exclusive_scope(method_scoping = {}, &block) - if method_scoping.values.any? { |e| e.is_a?(ActiveRecord::Relation) } - raise ArgumentError, <<-MSG - New finder API can not be used with_exclusive_scope. You can either call unscoped to get an anonymous scope not bound to the default_scope: - - User.unscoped.where(:active => true) - - Or call unscoped with a block: - - User.unscoped do - User.where(:active => true).all - end - - MSG - end - with_scope(method_scoping, :overwrite, &block) - end - def current_scope #:nodoc: Thread.current["#{self}_current_scope"] end @@ -129,15 +17,6 @@ module ActiveRecord def current_scope=(scope) #:nodoc: Thread.current["#{self}_current_scope"] = scope end - - private - - def construct_finder_arel(options = {}, scope = nil) - relation = options.is_a?(Hash) ? unscoped.apply_finder_options(options) : options - relation = scope.merge(relation) if scope - relation - end - end def populate_with_current_scope_attributes |