[Betternestedset-talk] Application suggestions

[Nick Pavlica]

> Are your root trees ordered or not ?
  I don't think that they are ordered.  Essentially, I have a chain of
sub_projects where I can have one or more sub projects at the same
level with an unlimited depth, but the aren't specifically ordered.

 If they aren't, use the :scope to
> store your 500,000 trees in the same table, without interaction between
> each of them. This should be very efficient.
Not quite sure what you mean here?  But are you saying something like
:scope => parent_id ?

> >  The main portion that I can't
> > seem to  get past is when I  try to make the subproject a child of
> > what should be it's parent (move_to_child_of) after the save.
> >
> >    @project.move_to_child_of ????
> >
> >  Can you point me in the right direction, it would be much appreciated.
>
> Pass an id or an object of the new parent.

I'm able to assign a child when I'm at the console, as described on
the Wiki.  I can also do it manually in my create subproject_method:
@project.move_to_child_of 1. But when I try to assign a variable in my
create_subproject method from the request parameters, I get a variety
of errors.  I'm not sure where I'm dropping the ball yet :)

Here is my current create method

  def create_subproject
    @project = Project.new(params[:project])
    @parent = (params[:parent_id])
    #@parent = @project.parent_id

    if @project.save
       @project.move_to_child_of @parent
      flash[:notice] = 'Project was successfully created.'
      redirect_to :action => 'list'
    else
      render :action => 'new'
    end
  end

I get this error : Couldn't find Project without an ID

of course "parent_id"=>"1" is in the request parameters list in the
debug message.


I tried passing the value with the submit button on the form:
<%= submit_tag "Create", :project_id =>  @parent.id; %>

Where parent.id is set with the new method.  This was how I was
inserting the parent ID when using acts_as_tree.


Thanks !
--Nick