I am trying to refactor my code to use ‘acts_as_tree’.
I have a self-referencing model called Property (<ActiveRecord) which
currently has the usual belongs_to and has_many declarations:
belongs_to :collection,
:class_name => “Property”,
:foreign_key => “collection_id”
has_many :collected_properties,
:class_name => “Property”,
:foreign_key => “collection_id”
I’d like to replace these with an ‘acts_as_tree’.
In my controller ‘create’ method currently I have the following code:
create a new Property of the correct sub class
@property = Property.factory(params[:which_type], params[:property])
# if adding a child to a root - not always the case!
if @flash[:is_collection] then
# this finds the immediate root (root id stored in flash)
root=PropertyCollection.find(@flash[:collection_id])
# this updates the foreign key collection_id in my new child row
@property.collection = root
end
# save the new row
if @property.save
flash[:notice] = ‘Property was successfully created.’
redirect_to :action => ‘list’
else
render(:partial =>
params[:controller]+"/"+params[:picklist][:pick])
end
end
How would I refactor the @propery.collection = root and @property.save
lines to make use of ‘acts_as_tree’. I note that in the Agile Web Dev
with Rails book that you can write:
root.children.create(…) but not sure how to change this to make use
of the save() and my instance variable @property
Thanks,
Lee.
