django:ValueError need more than 1 value to unpack -


i'm using ajax , django dynamically populate combo box. ajax component works fine , parse data view int view, when i'm using spiting function gives me exception called "value error:need more 1 value unpack ". can helps me figure out error :) :) code:

def dropdownpopulate(request):    if request.method=='post' :     key = request.post['id'] else:     key=""    level, tree_id=key.split(",")  next_nodes=structure.objects.filter(tree_id=key[tree_id]).filter(level=key[level]) context={'name':next_nodes}      return render_to_response('renderajax.html',context)

this because s.split(',') returning list of length 1:

level, tree_id = key.split(',')

make sure return list of length 2:

parts = key.split(',') if len(parts) == 2:     level, tree_id = parts elif len(parts) == 1:     level = parts[0]     tree_id = none else:     #     level = tree_id = none     pass

the apply filter this:

next_nodes = structure.objects.all() if level:     next_nodes = next_nodes.filter(level=level) if tree_id:     next_nodes = next_nodes.filter(tree_id=tree_id)

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