Refactor tz aware types, add support for PG ranges

This is an alternate implementation to #22875, that generalizes a lot of
the logic that type decorators are going to need, in order to have them
work with arrays, ranges, etc. The types have the ability to map over a
value, with the default implementation being to just yield that given
value. Array and Range give more appropriate definitions.

This does not automatically make ranges time zone aware, as they need to
be added to the `time_zone_aware` types config, but we could certainly
make that change if we feel it is appropriate. I do think this would be
a breaking change however, and should at least have a deprecation cycle.

Closes #22875.

/cc @matthewd

1 files changed, 4 insertions, 0 deletions

diff --git a/activemodel/lib/active_model/type/value.rb b/activemodel/lib/active_model/type/value.rb
index 9d1f267b41..0d2d6873a8 100644
--- a/activemodel/lib/active_model/type/value.rb
+++ b/activemodel/lib/active_model/type/value.rb
@@ -84,6 +84,10 @@ module ActiveModel
         false
       end
 
+      def map(value) # :nodoc:
+        yield value
+      end
+
       def ==(other)
         self.class == other.class &&
           precision == other.precision &&