Replaced === checks with is_a? checks #502, #82 [Marcel Molina]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@466 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/base.rb

@@ -1203,7 +1203,7 @@ module ActiveRecord #:nodoc:
       end
 
       def object_from_yaml(string)
-        return string unless String === string
+        return string unless string.is_a?(String)
         if has_yaml_encoding_header?(string)
           begin
             YAML::load(string)

activerecord/lib/active_record/connection_adapters/abstract_adapter.rb

@@ -217,21 +217,21 @@ module ActiveRecord
 
       private
         def string_to_date(string)
-          return string if Date === string
+          return string if string.is_a?(Date)
           date_array = ParseDate.parsedate(string)
           # treat 0000-00-00 as nil
           Date.new(date_array[0], date_array[1], date_array[2]) rescue nil
         end
         
         def string_to_time(string)
-          return string if Time === string
+          return string if string.is_a?(Time)
           time_array = ParseDate.parsedate(string).compact
           # treat 0000-00-00 00:00:00 as nil
           Time.send(Base.default_timezone, *time_array) rescue nil
         end
 
         def string_to_dummy_time(string)
-          return string if Time === string
+          return string if string.is_a?(Time)
           time_array = ParseDate.parsedate(string)
           # pad the resulting array with dummy date information
           time_array[0] = 2000; time_array[1] = 1; time_array[2] = 1;

activerecord/lib/active_record/fixtures.rb

@@ -166,7 +166,7 @@ class Fixtures < Hash
         fixtures.each { |fixture| fixture.insert_fixtures }
       end
 
-      reset_sequences(connection, table_names) if ActiveRecord::ConnectionAdapters::PostgreSQLAdapter === connection
+      reset_sequences(connection, table_names) if connection.is_a?(ActiveRecord::ConnectionAdapters::PostgreSQLAdapter)
 
       return fixtures.size > 1 ? fixtures : fixtures.first
     ensure

activerecord/lib/active_record/validations.rb

@@ -372,9 +372,9 @@ module ActiveRecord
         validations = self.class.read_inheritable_attribute(validation_method.to_s)
         if validations.nil? then return end
         validations.each do |validation|
-          if Symbol === validation
+          if validation.is_a?(Symbol)
             self.send(validation)
-          elsif String === validation
+          elsif validation.is_a?(String)
             eval(validation, binding)
           elsif validation_block?(validation)
             validation.call(self)