1 files changed, 39 insertions, 0 deletions
diff --git a/activemodel/lib/active_model/mass_assignment_security/permission_set.rb b/activemodel/lib/active_model/mass_assignment_security/permission_set.rb
new file mode 100644
index 0000000000..7c48472799
--- /dev/null
+++ b/activemodel/lib/active_model/mass_assignment_security/permission_set.rb
@@ -0,0 +1,39 @@
+require 'active_model/mass_assignment_security/sanitizer'
+
+module ActiveModel
+  module MassAssignmentSecurity
+    class PermissionSet < Set
+      attr_accessor :logger
+
+      def +(values)
+        super(values.map(&:to_s))
+      end
+
+      def include?(key)
+        super(remove_multiparameter_id(key))
+      end
+
+    protected
+
+      def remove_multiparameter_id(key)
+        key.to_s.gsub(/\(.+/, '')
+      end
+    end
+
+    class WhiteList < PermissionSet
+      include Sanitizer
+
+      def deny?(key)
+        !include?(key)
+      end
+    end
+
+    class BlackList < PermissionSet
+      include Sanitizer
+
+      def deny?(key)
+        include?(key)
+      end
+    end
+  end
+end
+\ No newline at end of file