`ash_postgres.generate_migrations` not `dumping_to_native` when generating a default value

[adamtharani]

Describe the bug
When using a custom type for an attribute with a default value the migration is generated with the internal value rather than the dump_to_native value

To Reproduce
A minimal set of resource definitions and calls that can reproduce the bug.

Expected behavior
The generated migration to have the default value as the one that gets returned from dump_to_native

** Runtime

• elixir 1.18.1-otp-27
• erlang 27.1.3
• macOS 15.5
• Ash 3.4.68
• Ash Postgres 2.5.11

Additional context
Add any other context about the problem here.

[zachdaniel]

Thinking about this, I'm not 100% sure that that will be the right solution for all types. More investigation is needed. However, something that you can do with custom types is

use AshPostgres.Type

def value_to_postgres_default(_type, _constraints, value) do
   "1" # for example
end

to customize how a given default value will be generated into migrations. Since that is a reasonable workaround, I will probably put this relatively low on the priority list.