gistfile1.rb

# visit.rb
Factory.define :visit do |f|
  f.patient { |a| a.association(:patient) }
  f.clinic  { |a| a.association(:clinic)  }
end

# patient.rb
# Defines a new sequence
Factory.sequence :email do |n|
  "person#{n}@example.com"
end

Factory.define :patient do |f|
  f.name   "Patient Name"
  f.email  { Factory.next(:email) }
end

# clinic.rb
Factory.define :clinic do |f|
  f.attribute_name   "attribute value"
end