do not send max depth in traversal if not specified during, added exa…

…mple

examples/traversal_example1.rb

@@ -0,0 +1,65 @@
+require 'rubygems'
+require 'neography'
+
+@neo = Neography::Rest.new
+
+def create_node(level, type)
+  @neo.create_node("NODE_LEVEL" => level, "TYPE" => type)
+end
+
+def create_other_node(type)
+  @neo.create_node("TYPE" => type)
+end
+
+
+def get_nodes_by_level(level, node)
+  starting_id = node["self"].split('/').last
+
+  @neo.traverse(node,"nodes", {"order" => "breadth first", 
+                                          "uniqueness" => "node global", 
+                                          "relationships" => {"type"=> "linked", "direction" => "out"}, 
+                                          "prune evaluator" => {
+                                            "language" => "javascript",
+                                            "body" => "position.startNode().hasProperty('NODE_LEVEL') 
+                                                    && position.startNode().getProperty('NODE_LEVEL')==5 
+                                                    && position.startNode().getId()!=#{starting_id};"},
+                                         "return filter" => {
+                                            "language" => "javascript",
+                                            "body" => "position.endNode().hasProperty('NODE_LEVEL') && position.endNode().getProperty('NODE_LEVEL')==5;"}})
+end
+
+node1 = create_node(5, "N")
+node2 = create_node(5, "N")
+node3 = create_node(5, "N")
+node4 = create_node(5, "N")
+node5 = create_node(5, "N")
+node6 = create_node(5, "N")
+node7 = create_node(5, "N")
+
+node8 = create_other_node("Y")
+node9 = create_other_node("Y")
+node10 = create_other_node("Y")
+
+node11 = create_node(6, "N")
+node12 = create_node(7, "N")
+node13 = create_node(8, "N")
+
+
+@neo.create_relationship("linked", node1, node2)
+@neo.create_relationship("linked", node2, node3)
+@neo.create_relationship("linked", node3, node4)
+@neo.create_relationship("linked", node4, node5)
+@neo.create_relationship("linked", node5, node6)
+@neo.create_relationship("linked", node6, node7)
+
+@neo.create_relationship("linked", node2, node8)
+@neo.create_relationship("linked", node3, node9)
+@neo.create_relationship("linked", node4, node10)
+
+@neo.create_relationship("linked", node5, node11)
+@neo.create_relationship("linked", node6, node12)
+@neo.create_relationship("linked", node7, node13)
+
+puts "The node levels returned are  #{get_nodes_by_level(5, node1).map{|n| n["data"]["NODE_LEVEL"]}.join(', ')}"
+
+# The node levels returned are  5, 5, 5, 5, 5, 5, 5

lib/neography/rest.rb

@@ -302,6 +302,7 @@ def get_uniqueness(uniqueness)
       end
 
       def get_depth(depth)
+        return nil if depth.nil?
         return 1 if depth.to_i == 0
         depth.to_i
       end