Hooks are ignored using add_ methods.

[Michał Gilewski]

Hi, I'm trying to create a simple plugin that should set the value for the 
column for the Sequel::Model. I noticed that when I'm trying to assign 
records using add_ method all the hooks are omitted for the join model. 
It's intentional? There is any way to catch any hook for that record?

user = User[args[:id]]
user.add_group(UsersGroups::General[group_id])

class User < Sequel::Model
...
class << self
private

def groups_associations_options
  {
    left_key: :user_id,
    right_key: :users_group_id,
    join_table: :users_groups_users,
  }
  end
end

many_to_many(
  :general_groups,
  class: 'UsersGroups::General',
  **groups_associations_options
)
many_to_many(
  :groups,
  class: :UsersGroup,
  **groups_associations_options
)
...
end

module UsersGroups
  class General < UsersGroup
    many_to_many(
      :users,
      class: :User,
      join_table: :users_groups_users,
      left_key: :users_group_id,
      right_key: :user_id
    )
  end
end

class UsersGroupUser < Sequel::Model(:users_groups_users)
  many_to_one :organization
  many_to_one :user
  many_to_one :users_group
end

module Sequel
  module Plugins
    module OrganizationIdentity
      def self.configure(model, opts=OPTS)
        model.instance_exec do
          @ignored_models = opts[:ignored_models]||[]
        end
      end
      module ClassMethods
        Plugins.inherited_instance_variables(self, :@ignored_models => nil)

        attr_reader :ignored_models
      end
      module InstanceMethods
        def before_create
          #want to catch UsersGroupUser instance over here
          set_organization_identity if new?
          super
        end

        private

        def set_organization_identity
          unless model.ignored_models.include?(model.name)
            field = 'organization_id'
            meth = :"#{field}="
            set_column_value(meth, get_column_value(field).presence || 
Current.organization_id) if respond_to?(field) && respond_to?(meth)
          end
        end
      end
    end
  end
end

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