Vivagraph serialization bug

gistfile1.coffee

###
  it is an extract from one of my classes.
 Here a save a log of nodes to the graph but only first one is shown =( 
###

    @graph = Viva.Graph.graph()
    params =
      container: @get("node")
    @renderer = Viva.Graph.View.renderer(@graph, params)
    @renderer.run()

    @graph.addNode(1, "some first data")
    @graph.addNode(2, "some second data")
    @graph.addNode(3, "is not saved")
    @graph.addNode(4, "is not saved")
    @graph.addNode(5, "is not saved")
    @graph.addNode(6, "is not saved")
    @graph.addNode(7, "is not saved")
    @graph.addNode(8, "is not saved")


    @graph.addLink(1, 2)
    @graph.addLink(2, 3)
    @graph.addLink(4, 5)
    @graph.addLink(5, 1)
    @graph.addLink(1, 4)
    #@graph.addLink(8, 6)


    nodes = []
    edges = []
    @graph.forEachNode( (n)->
      node =
        id: n.id
        data: n.data
      nodes.push(node)
    )
    @graph.forEachLink( (link)->
      edges.push
        fromId : link.fromId,
        toId: link.toId,
        data : link.data
    )
    g =
      nodes:nodes
      edges:edges
    alert JSON.stringify(g)
    @

    ###
      alert's outpit, only first node is given ;=(
  
      {"nodes":[{"id":1,"data":"some first data"}],"edges":[{"fromId":1,"toId":2},{"fromId":2,"toId":3},{"fromId":4,"toId":5},{"fromId":5,"toId":1},{"fromId":1,"toId":4}]}
    ###