lib/spiderfw/model/mixins/tree.rb in spiderfw-0.6.1 vs lib/spiderfw/model/mixins/tree.rb in spiderfw-0.6.2

@@ -17,10 +17,11 @@
             c = Condition.and
             c[left_el] = (left..right)
             q = Query.new(c)
             q.order_by(left_el)
             res = element.model.find(q)
+            return [] unless res
             right_stack = []
             res.each do |obj|
                 if (right_stack.length > 0)
                     right_stack.pop while (right_stack[right_stack.length-1] < obj.get(right_el))
                     obj.set(element.attributes[:tree_depth], right_stack.length)
@@ -87,10 +88,10 @@
                        QuerySet.autoloading(self).send("#{name}_leafs")
                       
                    end
                    
                    define_method("#{name}_all") do
-                       qs = QuerySet.new(self)
+                       qs = QuerySet.static(self)
                        self.send("#{name}_roots").each do |root|
                            qs += root.tree_all(name)
                        end
                        return qs
                    end