dependents are destroyed before client before_destroy hooks are called

Using an after_destroy callback makes sense, but the record is frozen so you can't iterate over its associations.

Even then, a user's after_destroy callback attempting to manipulate an association would fail similarly.

Another workaround is to eschew the shortcut and put the callback in the correct order by hand:

class Post
  before_destroy { |post| do_stuff_with_post_comments }
  before_destroy { |post| post.comments.each { |comment| comment.destroy } }
end

or

class Post
  before_destroy do |post|
    post.comments.each do |comment|
      # ...
      comment.destroy
    end
  end
end

etc.

I think the fd keyword should be removed.

Seconded

References #2065.

Changeset[2940]