nfabian13 · August 29, 2015 14:12 · Feb 24, 2014 · Feb 18, 2014 · Feb 18, 2014
diff --git a/filterable.rb b/filterable.rb
@@ -11,7 +11,7 @@ module ClassMethods
     # URL params. Make sure you don't pass stuff directly from the web without 
     # whitelisting only the params you care about first!
     def filter(filtering_params)
-      results = self
+      results = self.where(nil) # create an anonymous scope
       filtering_params.each do |key, value|
         results = results.public_send(key, value) if value.present?
       end

diff --git a/filterable.rb b/filterable.rb
@@ -1,7 +1,15 @@
+# Call scopes directly from your URL params:
+#
+#     @products = Product.filter(params.slice(:status, :location, :starts_with))
 module Filterable
   extend ActiveSupport::Concern
 
   module ClassMethods
+
+    # Call the class methods with the same name as the keys in <tt>filtering_params</tt>
+    # with their associated values. Most useful for calling named scopes from 
+    # URL params. Make sure you don't pass stuff directly from the web without 
+    # whitelisting only the params you care about first!
     def filter(filtering_params)
       results = self
       filtering_params.each do |key, value|

diff --git a/filterable.rb b/filterable.rb
@@ -0,0 +1,13 @@
+module Filterable
+  extend ActiveSupport::Concern
+
+  module ClassMethods
+    def filter(filtering_params)
+      results = self
+      filtering_params.each do |key, value|
+        results = results.public_send(key, value) if value.present?
+      end
+      results
+    end
+  end
+end
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