refactor, introduce `Type#type_cast_for_schema` to cast for schema.rb

This removes the case statement in `SchemaDumper` and gives every `Type`
the possibility to control the SchemaDumper default value output.

/cc @sgrif

1 files changed, 4 insertions, 0 deletions

diff --git a/activerecord/lib/active_record/type/date.rb b/activerecord/lib/active_record/type/date.rb
index 45c69460ef..d90a6069b7 100644
--- a/activerecord/lib/active_record/type/date.rb
+++ b/activerecord/lib/active_record/type/date.rb
@@ -9,6 +9,10 @@ module ActiveRecord
         ::Date
       end
 
+      def type_cast_for_schema(value)
+        "'#{value.to_s(:db)}'"
+      end
+
       private
 
       def cast_value(value)