adds date helper

lib/active_model/dates.rb

@@ -0,0 +1,25 @@
+module ActiveModel::Dates
+
+  def parse_date(field, attrs)
+    day, month, year = attrs["#{field}(1i)"],
+                       attrs["#{field}(2i)"],
+                       attrs["#{field}(3i)"]
+
+    return nil unless day.present? && month.present? && year.present?
+    Date.new(day.to_i, month.to_i, year.to_i)
+  end
+
+  def remove_date(field, attrs)
+    attrs.except("#{field}(1i)", "#{field}(2i)", "#{field}(3i)")
+  end
+
+  def date_to_string(date)
+    date.strftime("%d-%m-%Y")
+  end
+
+  def string_to_date(value)
+    day, month, year = value.split("-")
+    Date.new(year.to_i, month.to_i, day.to_i)
+  end
+
+end