reluctantly overriding whole execute_callstack_for_multiparameter_attributes method

this fixes issue for Date column types. Damn method is just too
unwieldly and should be refactored in Rails.

lib/validates_timeliness/extensions/multiparameter_handler.rb

@@ -3,26 +3,64 @@ module ValidatesTimeliness
     module MultiparameterHandler
       extend ActiveSupport::Concern
 
+      # Stricter handling of date and time values from multiparameter 
+      # assignment from the date/time select view helpers
+
       included do
         alias_method_chain :instantiate_time_object, :timeliness
+        alias_method_chain :execute_callstack_for_multiparameter_attributes, :timeliness
       end
 
       private
 
-      # Stricter handling of date and time values from multiparameter 
-      # assignment from the date/time select view helpers
-      #
-      def instantiate_time_object_with_timeliness(name, values)
-        unless Date.valid_civil?(*values[0..2])
-          value =  [values[0], *values[1..2].map {|s| s.to_s.rjust(2,"0")} ].join("-")
-          value += ' ' + values[3..5].map {|s| s.to_s.rjust(2, "0") }.join(":") unless values[3..5].empty?
-          return value
-        end
+      def invalid_multiparameter_date_or_time_as_string(values)
+        value =  [values[0], *values[1..2].map {|s| s.to_s.rjust(2,"0")} ].join("-")
+        value += ' ' + values[3..5].map {|s| s.to_s.rjust(2, "0") }.join(":") unless values[3..5].empty?
+        value
+      end
 
-        if self.class.send(:create_time_zone_conversion_attribute?, name, column_for_attribute(name))
-          Time.zone.local(*values)
+      def instantiate_time_object_with_timeliness(name, values)
+        if Date.valid_civil?(*values[0..2])
+          instantiate_time_object_without_timeliness(name, values)
         else
-          Time.time_with_datetime_fallback(self.class.default_timezone, *values)
+          invalid_multiparameter_date_or_time_as_string(values)
+        end
+      end
+
+      def instantiate_date_object(name, values)
+        values = values.map { |v| v.nil? ? 1 : v }
+        Date.new(*values)
+      rescue ArgumentError => ex
+        invalid_multiparameter_date_or_time_as_string(values)
+      end
+
+      def execute_callstack_for_multiparameter_attributes_with_timeliness(callstack)
+        errors = []
+        callstack.each do |name, values_with_empty_parameters|
+          begin
+            klass = (self.class.reflect_on_aggregation(name.to_sym) || column_for_attribute(name)).klass
+            values = values_with_empty_parameters.reject { |v| v.nil? }
+
+            if values.empty?
+              send(name + "=", nil)
+            else
+
+              value = if Time == klass
+                instantiate_time_object(name, values)
+              elsif Date == klass
+                instantiate_date_object(name, values_with_empty_parameters)
+              else
+                klass.new(*values)
+              end
+
+              send(name + "=", value)
+            end
+          rescue => ex
+            errors << ActiveRecord::AttributeAssignmentError.new("error on assignment #{values.inspect} to #{name}", ex, name)
+          end
+        end
+        unless errors.empty?
+          raise ActiveRecord::MultiparameterAssignmentErrors.new(errors), "#{errors.size} error(s) on assignment of multiparameter attributes"
         end
       end
 

spec/validates_timeliness/extensions/multiparameter_handler_spec.rb

@@ -3,19 +3,31 @@ require 'spec_helper'
 describe ValidatesTimeliness::Extensions::MultiparameterHandler do
   let(:employee) { Employee.new }
 
-  it 'should return string value for invalid dates' do
-    instantiate_time_object('birth_date', [2000, 2, 31]).should == '2000-02-31'
+  context "time column" do
+    it 'should return string value for invalid date portion' do
+      multiparameter_attribute(:birth_datetime, [2000, 2, 31, 12, 0, 0])
+      employee.birth_datetime_before_type_cast.should == '2000-02-31 12:00:00'
+    end
+     
+    it 'should return Time value for valid datetimes' do
+      multiparameter_attribute(:birth_datetime, [2000, 2, 28, 12, 0, 0])
+      employee.birth_datetime_before_type_cast.should be_kind_of(Time)
+    end
   end
 
-  it 'should return string value for invalid datetimes' do
-    instantiate_time_object('birth_datetime', [2000, 2, 31, 12, 0, 0]).should == '2000-02-31 12:00:00'
-  end
-   
-  it 'should return Time value for valid datetimes' do
-    instantiate_time_object('birth_datetime', [2000, 2, 28, 12, 0, 0]).should be_kind_of(Time)
+  context "date column" do
+    it 'should return string value for invalid date' do
+      multiparameter_attribute(:birth_date, [2000, 2, 31])
+      employee.birth_date_before_type_cast.should == '2000-02-31'
+    end
+
+    it 'should return Date value for valid date' do
+      multiparameter_attribute(:birth_date, [2000, 2, 28])
+      employee.birth_date_before_type_cast.should be_kind_of(Date)
+    end
   end
 
-  def instantiate_time_object(name, values)
-    employee.send(:instantiate_time_object, name, values)
+  def multiparameter_attribute(name, values)
+    employee.send(:execute_callstack_for_multiparameter_attributes, name.to_s => values)
   end
 end