multiparameter extension for AR

lib/validates_timeliness/extensions.rb

@@ -1,9 +1,14 @@
 module ValidatesTimeliness
   module Extensions
-    autoload :DateTimeSelect, 'validates_timeliness/extensions/date_time_select'
+    autoload :DateTimeSelect,       'validates_timeliness/extensions/date_time_select'
+    autoload :MultiparameterParser, 'validates_timeliness/extensions/multiparameter_parser'
   end
 
   def self.enable_date_time_select_extension!
     ::ActionView::Helpers::InstanceTag.send(:include, ValidatesTimeliness::Extensions::DateTimeSelect)
   end
+
+  def self.enable_multiparameter_parser!
+    ::ActiveRecord::Base.send(:include, ValidatesTimeliness::Extensions::MultiparameterParser)
+  end
 end

lib/validates_timeliness/extensions/multiparameter_parser.rb

@@ -0,0 +1,31 @@
+module ValidatesTimeliness
+  module Extensions
+    module MultiparameterParser
+      extend ActiveSupport::Concern
+
+      included do
+        alias_method_chain :instantiate_time_object, :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
+
+        if self.class.send(:create_time_zone_conversion_attribute?, name, column_for_attribute(name))
+          Time.zone.local(*values)
+        else
+          Time.time_with_datetime_fallback(@@default_timezone, *values)
+        end
+      end
+
+    end
+  end
+end

spec/spec_helper.rb

@@ -17,6 +17,7 @@ require 'validates_timeliness'
 ValidatesTimeliness.setup do |c|
   c.extend_classes = [ ActiveModel::Validations, ActiveRecord::Base ]
   c.enable_date_time_select_extension!
+  c.enable_multiparameter_parser!
 end
 
 Time.zone = 'Australia/Melbourne'

spec/validates_timeliness/extensions/multiparameter_parser_spec.rb

@@ -0,0 +1,22 @@
+require 'spec_helper'
+
+describe ValidatesTimeliness::Extensions::MultiparameterParser 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'
+  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
+
+  # This is giving an error in AR for undefined @@default_timezone.
+  # it 'should return Time value for valid datetimes' do
+  #   instantiate_time_object('birth_datetime', [2000, 2, 28, 12, 0, 0]).should be_find_of(Time)
+  # end
+
+  def instantiate_time_object(name, values)
+    employee.send(:instantiate_time_object, name, values)
+  end
+end