adding DecimalValidator

lib/apipie/extractor/collector.rb

@@ -75,6 +75,10 @@ def refine_params_description(params_desc, recorded_params)
             if param_desc[:type].first == :number && (key.to_s !~ /id$/ || !Apipie::Validator::NumberValidator.validate(value))
               param_desc[:type].shift
             end
+
+            if param_desc[:type].first == :decimal && (key.to_s !~ /id$/ || !Apipie::Validator::DecimalValidator.validate(value))
+              param_desc[:type].shift
+            end
           end
 
           if value.is_a? Hash

lib/apipie/validator.rb

@@ -374,6 +374,27 @@ def description
       end
     end
 
+    class DecimalValidator < BaseValidator
+
+      def validate(value)
+        self.class.validate(value)
+      end
+
+      def self.build(param_description, argument, options, block)
+        if argument == :decimal
+          self.new(param_description)
+        end
+      end
+
+      def description
+        "Must be a decimal number."
+      end
+
+      def self.validate(value)
+        value.to_s =~ /\A[0-9]+([,.][0-9]+)?\Z$/
+      end
+    end
+
     class NumberValidator < BaseValidator
 
       def validate(value)