new files?

1 files changed, 25 insertions, 0 deletions

diff --git a/lib/active_relation/relations/selection.rb b/lib/active_relation/relations/selection.rb
new file mode 100644
index 0000000000..e102d105a0
--- /dev/null
+++ b/lib/active_relation/relations/selection.rb
@@ -0,0 +1,25 @@
+module ActiveRelation
+  module Relations
+    class Selection < Compound
+      attr_reader :relation, :predicate
+  
+      def initialize(relation, *predicates)
+        @predicate = predicates.shift
+        @relation = predicates.empty?? relation : Selection.new(relation, *predicates)
+      end
+  
+      def ==(other)
+        relation == other.relation and predicate == other.predicate
+      end
+  
+      def qualify
+        Selection.new(relation.qualify, predicate.qualify)
+      end
+  
+      protected
+      def selects
+        relation.send(:selects) + [predicate]
+      end
+    end
+  end
+end
\ No newline at end of file