luisguzman02 · August 27, 2019 16:07 · Aug 27, 2019
diff --git a/filterable.rb b/filterable.rb
@@ -0,0 +1,26 @@
+module Filterable
+  extend ActiveSupport::Concern
+
+  included do
+    scope :filtered, ->(values) {
+      current = all
+      filters.each do |key, method|
+        if values.try(:key?, key) && current.respond_to?(method)
+          current = current.send(method, values[key])
+        end
+      end
+      current
+    }
+  end
+
+  module ClassMethods
+    def add_filter(filter_key, method_name, callable = nil)
+      scope(method_name, callable) if callable
+      filters[filter_key] = method_name
+    end
+
+    def filters
+      @filters ||= {}
+    end
+  end
+end