acts_as_list :scope with habtm

rubyonrails-talk
1

Hello,

I have a problem with a little more complex DB-schema.

My target are and sorted trees like this: 1 One 1.1 One.One 1.2 One.Two 2 Two

I use for it two models: - top: This an item, with the name and position - agenda: Collections of tops

class Agenda < ActiveRecord::Base   has_and_belongs_to_many :tops end

class Top < ActiveRecord::Base   has_and_belongs_to_many :agendas   acts_as_list :scope => :parent_id   acts_as_tree :order => :position end

Datebase tops: id | parent_id | position | title 1 | 0 | 1 | One 2 | 0 | 2 | Two 3 | 1 | 1 | One.One 4 | 1 | 2 | One.Two

Looks like: valibuk.net » One Model With acts_as_list and acts_as_tree

Works fine.

But my problem: The tops-database include tops for all agendas. So a second agenda need also a new top with parent_id=0 and position=1: 5 | 0 | 1 | New One ... but acts_as_list used (sadly) correctly parent_id=0 and position=3

Result:   acts_as_list :scope => :parent_id + "correct agendas"

Which scope-option I need? Anyone can me help with the SQL-statement?

Or I must used acts_as_nested_set? Never used it. But there the same problem with :scope and habtm-relationship, I think.

Thanks for help   Martin

2

Martin schrieb:

I have a problem with a little more complex DB-schema.

Anybody an idea?