Hi, I have a class named Node that has another nodes acting like
sources and destinations. We can build a graph using these nodes:
--------------------------------------------------
class Node < ActiveRecord::Base
hobo_model # Don't put anything above this
acts_as_nested_set :scope => :root_id
..............
has_many :edges_as_source, :class_name => 'NodesEdges', :foreign_key
=> 'source_id', :dependent => :destroy, :order => :position
has_many :edges_as_destination, :class_name =>
'NodesEdges', :foreign_key => 'destination_id'
has_many :sources, :through => :edges_as_destination , :accessible
=> true
has_many :destinations, :through => :edges_as_source , :order =>
'nodes_edges.position',:accessible => true
.......
end
-------------------
This is the nodes_edges class that allows us to connect the nodes:
-------------------
class NodesEdges < ActiveRecord::Base
hobo_model # Don't put anything above this
belongs_to :source, :class_name => 'Node', :creator => true
belongs_to :destination, :class_name => 'Node'
acts_as_list :scope => :source
fields do
timestamps
end
....
end
-------------
NodesEdges has a position and it really works. The destinations are
listed in the correct order.
BUT....
The problem is that *sortable-collection* is not working.
This is part of my application.dryml:
---------------------
<extend tag="show-page" for="SubSystem">
<old-show-page>
<field-list: fields="node_type, project, default_mode" param/>
<collection-section:>
....
<h4 param="collection-heading">Destinations (for sorting reasons)</
h4>
<sortable-collection:edges_as_source param/>
....
</old-show-page>
</extend>
-----------------------
The show page is showing perfectly, we can drag & drop, but it does
not alter the position value of the list. I think it is invoking
nothing, cause if I add this to the NodesEdgesController:
def reorder
something to crash
end
Nothing happens!!
I also have checked for activity in the Firebug, but nothing happened.
Just mention that SubSystem is a children class of Node:
-----------------------
class SubSystem < Node
has_many :edges_as_source, :class_name => 'NodesEdges', :foreign_key
=> 'source_id', :dependent=>:destroy,:order => :position
has_many :edges_as_destination, :class_name =>
'NodesEdges', :foreign_key => 'destination_id'
has_many :sources, :through => :edges_as_destination , :accessible
=> true
has_many :destinations, :through => :edges_as_source , :order =>
'nodes_edges.position', :accessible => true
...
end
---------------------
I have searched the hobo users group and internet and the cookbook and
found nothing:
* my position column is on the "list-item" class table.
* the acts_as_list is present and well scoped in the "list-item"
class.
* the has_many relationship is present in the "container" class and
has the :order => :position configured.
* the application.dryml has the <sortable-collection> tag. I have
checked that the pages.dryml also generates the <sortable-collection>
tag.
* I have tested it without def reorder, with "def reorder hobo_reorder
end", and with "def reorder something to crash end", and no
differences.
* If I change manually the position column, it works.
* I have no null values in the position column.
Any idea of what is happening? Any new and interesting test to do?
Thank you.
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