Generate a sequence for FactorGirl trip id
Generate a sequence for FactorGirl trip id

grantziolkowski/caravan,bicyclethief/caravan,bicyclethief/caravan,grantziolkowski/caravan,nyc-rock-doves-2015/caravan,grantziolkowski/caravan,nyc-rock-doves-2015/caravan,bicyclethief/caravan,nyc-rock-doves-2015/caravan