Administrate SelectField options being chached

[zaidhuda]

• What were you trying to do?

    post_ids: SelectField.with_options(
      multiple: true,
      collection: Post.ids
    )

• What did you end up with (logs, or, even better, example apps are great!)?

When I create a post, the select option does not change. It would exclude the new post id.
When I destroy a post, the select option does not change. It would include the old post id.

• What versions are you running?
  • Rails 6.0.0
  • administrate git: 'https://github.com/thoughtbot/administrate'

ref thoughtbot/administrate#1466