Delegate type_cast to injected type object in mysql

activerecord/lib/active_record/connection_adapters/column.rb

@@ -132,6 +132,8 @@ def extract_default(default)
       end
 
       class << self
+        include Type::TimeValue
+
         # Used to convert from BLOBs to Strings
         def binary_to_string(value)
           value
@@ -215,21 +217,6 @@ def new_date(year, mon, mday)
             end
           end
 
-          def new_time(year, mon, mday, hour, min, sec, microsec, offset = nil)
-            # Treat 0000-00-00 00:00:00 as nil.
-            return nil if year.nil? || (year == 0 && mon == 0 && mday == 0)
-
-            if offset
-              time = Time.utc(year, mon, mday, hour, min, sec, microsec) rescue nil
-              return nil unless time
-
-              time -= offset
-              Base.default_timezone == :utc ? time : time.getlocal
-            else
-              Time.public_send(Base.default_timezone, year, mon, mday, hour, min, sec, microsec) rescue nil
-            end
-          end
-
           def fast_string_to_date(string)
             if string =~ Format::ISO_DATE
               new_date $1.to_i, $2.to_i, $3.to_i

activerecord/lib/active_record/connection_adapters/mysql_adapter.rb

@@ -68,26 +68,12 @@ module ConnectionAdapters
     class MysqlAdapter < AbstractMysqlAdapter
 
       class Column < AbstractMysqlAdapter::Column #:nodoc:
-        def self.string_to_time(value)
-          return super unless Mysql::Time === value
-          new_time(
-            value.year,
-            value.month,
-            value.day,
-            value.hour,
-            value.minute,
-            value.second,
-            value.second_part)
-        end
-
-        def self.string_to_dummy_time(v)
-          return super unless Mysql::Time === v
-          new_time(2000, 01, 01, v.hour, v.minute, v.second, v.second_part)
-        end
-
-        def self.string_to_date(v)
-          return super unless Mysql::Time === v
-          new_date(v.year, v.month, v.day)
+        def type_cast(value)
+          if encoded?
+            super
+          else
+            cast_type.type_cast(value)
+          end
         end
 
         def adapter
@@ -329,27 +315,37 @@ def type_cast(value)
           end
         end
 
-        class DateTime < Type
-          def type; :datetime; end
-
-          def type_cast(value)
-            return if value.nil?
-
-            # FIXME: probably we can improve this since we know it is mysql
-            # specific
-            ConnectionAdapters::Column.string_to_time value
+        class DateTime < ConnectionAdapters::Type::DateTime
+          def cast_value(value)
+            if Mysql::Time === value
+              new_time(
+                value.year,
+                value.month,
+                value.day,
+                value.hour,
+                value.minute,
+                value.second,
+                value.second_part)
+            else
+              super
+            end
           end
         end
 
-        class Time < Type
-          def type; :time; end
-
-          def type_cast(value)
-            return if value.nil?
-
-            # FIXME: probably we can improve this since we know it is mysql
-            # specific
-            ConnectionAdapters::Column.string_to_dummy_time value
+        class Time < ConnectionAdapters::Type::Time
+          def cast_value(value)
+            if Mysql::Time === value
+              new_time(
+                2000,
+                01,
+                01,
+                value.hour,
+                value.minute,
+                value.second,
+                value.second_part)
+            else
+              super
+            end
           end
         end
 
@@ -418,6 +414,12 @@ def self.find_type(field)
         end
       end
 
+      def initialize_type_map(m) # :nodoc:
+        super
+        m.register_type %r(datetime)i, Fields::DateTime.new
+        m.register_type %r(time)i,     Fields::Time.new
+      end
+
       def exec_without_stmt(sql, name = 'SQL') # :nodoc:
         # Some queries, like SHOW CREATE TABLE don't work through the prepared
         # statement API. For those queries, we need to use this method. :'(

activerecord/lib/active_record/connection_adapters/type.rb

@@ -1,4 +1,6 @@
+require 'active_record/connection_adapters/type/time_value'
 require 'active_record/connection_adapters/type/value'
+
 require 'active_record/connection_adapters/type/binary'
 require 'active_record/connection_adapters/type/boolean'
 require 'active_record/connection_adapters/type/date'

activerecord/lib/active_record/connection_adapters/type/date_time.rb

@@ -2,6 +2,8 @@ module ActiveRecord
   module ConnectionAdapters
     module Type
       class DateTime < Value # :nodoc:
+        include TimeValue
+
         def type
           :datetime
         end

activerecord/lib/active_record/connection_adapters/type/time.rb

@@ -2,6 +2,8 @@ module ActiveRecord
   module ConnectionAdapters
     module Type
       class Time < Value # :nodoc:
+        include TimeValue
+
         def type
           :time
         end

activerecord/lib/active_record/connection_adapters/type/time_value.rb

@@ -0,0 +1,24 @@
+module ActiveRecord
+  module ConnectionAdapters
+    module Type
+      module TimeValue # :nodoc:
+        private
+
+        def new_time(year, mon, mday, hour, min, sec, microsec, offset = nil)
+          # Treat 0000-00-00 00:00:00 as nil.
+          return if year.nil? || (year == 0 && mon == 0 && mday == 0)
+
+          if offset
+            time = ::Time.utc(year, mon, mday, hour, min, sec, microsec) rescue nil
+            return unless time
+
+            time -= offset
+            Base.default_timezone == :utc ? time : time.getlocal
+          else
+            ::Time.public_send(Base.default_timezone, year, mon, mday, hour, min, sec, microsec) rescue nil
+          end
+        end
+      end
+    end
+  end
+end