OK. I just added <view:unit_activity.position/> to the view and get
(Not Available) when I render the page.

In the unit_activity table, the position column is being populated
when the units are added to an activity, but not when reordered from
the acts_as_list view.

Could this be a permission or scope problem caused by 'position' being
on the join table?

Thanks,

On Jun 9, 5:28 pm, Ronbo <[email protected]> wrote:
> Yup. I have a 'position' column on the join table.
>
> On Jun 9, 5:06 pm, kevinpfromnm <[email protected]> wrote:
>
> > hmm... you've already done the migration after declaring the
> > acts_as_list?
>
> > On Jun 9, 2:46 pm, Ronbo <[email protected]> wrote:
>
> > > Thanks again. The tips are really appreciated.
>
> > > I added the hobo_reorder as shown below. The page now renders properly
> > > (with the sortable-collection UI controls).
>
> > > class UnitsController < ApplicationController
> > >   hobo_model_controller
> > >   auto_actions :all
>
> > >   def reorder
> > >     hobo_reorder
> > >   end
> > > end
>
> > > The page now renders properly (with the sortable-collection UI
> > > controls), but moving a list item fails to update the position with
> > > the following error:
> > > ActiveRecord::UnknownAttributeError (unknown attribute: position):
>
> > > I have the position declared on the join relation:
> > >    has_many :unit_activities, :order => :position
>
> > > Is this the right place, or is there something else I need to tweak to
> > > get this going?
> > > I'm getting closer...
>
> > > On Jun 9, 2:46 pm, kevinpfromnm <[email protected]> wrote:
>
> > > > you need the method on the controller for it, I can't remember if it's
> > > > something special or just standard update methods.
>
> > > > On Jun 9, 12:41 pm, Ronbo <[email protected]> wrote:
>
> > > > > Hi Kevin,
>
> > > > > Do you mean something like:
>
> > > > > class Activity < ActiveRecord::Base
> > > > >    has_many :unit_activities, :order => :position
> > > > >    has_many :units, :through => :unit_activities
>
> > > > > ....
>
> > > > > class UnitActivity < ActiveRecord::Base
> > > > >    belongs_to :activity
> > > > >    belongs_to :unit
> > > > >    acts_as_list :scope => :activity
>
> > > > > ...
> > > > > class Unit < ActiveRecord::Base
> > > > >    has_many :unit_activities
> > > > >    has_many :activities, :through => :unit_activities
>
> > > > > class ActivityHints < Hobo::ViewHints
> > > > >   children :units
>
> > > > > This generates a <collection:units param/> tag for the Activities show
> > > > > page. If I manually change it to <sortable-collection:units param/>, I
> > > > > get the following error:
>
> > > > > undefined method `reorder_units_url'
>
> > > > > Am I missing the gist of what you mean, or am I missing a step? Do I
> > > > > need to pass something to sortable-collection?
>
> > > > > Thanks,
>
> > > > > On Jun 9, 1:32 pm, kevinpfromnm <[email protected]> wrote:
>
> > > > > > You want the acts_as_list and accessible on the join table, not the
> > > > > > end table.  that way, each item can be sorted per document.
>
> > > > > > On Jun 9, 9:08 am, Ronbo <[email protected]> wrote:
>
> > > > > > > Hi all,
>
> > > > > > > I am still very new to Hobo, and learning mostly through trial and
> > > > > > > error. I have been creating small throw-away apps to explore and 
> > > > > > > test
> > > > > > > things out.
>
> > > > > > > I do have a serious app in mind though, and I am trying to figure 
> > > > > > > out
> > > > > > > how to implement a specific workflow in which users will create 
> > > > > > > new
> > > > > > > documents and add boilerplate text pieces to them from a 
> > > > > > > predefined
> > > > > > > set. Since documents will have many pieces and a piece can belong 
> > > > > > > to
> > > > > > > many documents, my first hunch is that I would use a
>
> > > > > > > has_many :through => x, :accessible => true
>
> > > > > > > sort of relationship, with the pieces as children of the document
> > > > > > > model. Users could create a new doc and add the pieces they want.
> > > > > > > Where I am having problems prototyping this is that the pieces in 
> > > > > > > the
> > > > > > > doc should be sortable. I've hunted through the hobo and rails 
> > > > > > > forums
> > > > > > > and can't find a recipe for how to make acts_as_list work with a
> > > > > > > joined many-to-many sort of relationship.
>
> > > > > > > Is this possible? If so, is there a better way of defining the
> > > > > > > relationship or some special magic to getting it working through a
> > > > > > > join?
>
> > > > > > > Any hints are much appreciated.

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