erd.dot

digraph G {

// basic settings
  fontname = "Bitstream Vera Sans"
  fontsize = 8

  edge [
    fontname = "Bitstream Vera Sans"
    fontsize = 8
  ]

  node [
    fontname = "Bitstream Vera Sans"
    fontsize = 8
  ]

  // models
  node [
    shape = "rectangle"
  ]

  Campaign
  Goody
  Order
  Supporter
  AdminUser

  // relations 1..n
  edge [
    arrowtail = "none"
    arrowhead = "none"
    headlabel = "n"
    taillabel = "1"
  ]

  Campaign -> Goody
  Goody -> Order

  // relations 1..1
  edge [
    arrowtail = "none"
    arrowhead = "none"
    headlabel = "1"
    taillabel = "1"
  ]


  Order -> Supporter
  AdminUser

}