[Feature idea] Allow custom dependent callbacks on has_many Associations

[Bálint Erdős]

I was thinking of implementing a way to use custom method names for dependent has_many Associations.

This way I wouldn't have to use workarounds like rewriting destroy methods, or stuffing code handling other models into methods for before_destroy callbacks.

class Thing < ApplicationRecord

  belongs_to :owner, class_name: 'User'

  def reset_owner

    # set owner to another user based on settings

  end

end

class User < ApplicationRecord

  has_many :things, dependent: :reset_owner

end

I don't think other kinds of Associations would need to support this.

What do you think?