Asserting scope in a model method

Rails
1

lets say this is a comments model, acts_as_tree

used like this @post.comments.find_roots

def self.find_roots(options = {})
with_scope :find => options do
self.find(:conditions => [‘parent_id IS NULL’], :order
=> :position )
end
end

Question: how can i enforce any call is scoped by project_id?

(I dont want to allow Post.find_roots, it must have a project_id)

2

Jonathan L. wrote:

lets say this is a comments model, acts_as_tree

used like this @post.comments.find_roots

def self.find_roots(options = {})
with_scope :find => options do
self.find(:conditions => [‘parent_id IS NULL’], :order
=> :position )
end
end

Question: how can i enforce any call is scoped by project_id?

(I dont want to allow Post.find_roots, it must have a project_id)

You can define it on your association, if you only want that method
accessible via the association.

class Post < ActiveRecord::Base
has_many :comments do
def find_roots(options = {})
#…
end
end
end

Now you can do @post.comments.find_roots but not Post.find_roots