make sure a String is returned as foreign key
make sure a String is returned as foreign key

Signed-off-by: David A. Cuadrado <9e86d6d2f3901859480d56aec66da07500c6a5df@gmail.com>

blt04/mongoid,Houdini/mongoid,tengine/mongoid,jonhyman/mongoid,jordelver/mongoid,razum2um/mongoid,JonRowe/mongoid,tzar/mongoid,trmmy/mongoid,imomoisoft/mongoid,snapfish-soma/mongoid,iamnader/mongoid-2,ganlron/mongoid,evendis/mongoid,toppan-forms/mongoid,Zhomart/mongoid,leozhang37/mongoid,DanielVartanov/mongoid,mathieuravaux/mongoid,Winslett/mongoid,timgluz/mongoid,Codas/mongoid,railsjedi/mongoid,joshsoftware/mongoid,outoftime/mongoid,idesaku/mongoid,wyattisimo/mongoid,LastStar/mongoid,jonasschneider/mongoid,gregmolnar/mongoid,Speakol/mongoid,jamesalmond/mongoid,freerange/mongoid,schnittchen/mongoid,ches/mongoid,stnguyen/mongoid,hbakhtiyor/mongoid,shingara/mongoid,caiofilipini/mongoid,drfeelngood/mongoid,CIRCUITLLC/mongoid,nviennot/mongoid,pkieltyka/mongoid,cleishm/mongoid,jbrien/mongoid,matbox/mongoid,ealdent/mongoid,rpocklin/mongoid,rmm5t/mongoid,gregmolnar/mongoid,xentek/mongoid,rubrikkfabrikken/mongoid,dnd/mongoid,cmpolis/mongoid,gregory-m/mongoid,stellard/mongoid,asaaki/mongoid,wuboy0307/mongoid,dustinwatson/mongoid,cncolder/mongoid,Subskii/mongoid,florent/mongoid,nullstyle/mongoid,flada-auxv/mongoid,priyaaank/mongoid,cmartyn/mongoid,xinuc/mongoid,amw/mongoid,77Agency/mongoid,praecipula/mongoid,moretea/mongoid,bdmac/mongoid,ErisExchange/mongoid,brynary/mongoid,jstrocel/mongoid,sivagollapalli/mongoid,cao7113/mongoid,tricknotes/mongoid,krasnoukhov/mongoid,mongodb/mongoid,cjab/mongoid,codedmart/mongoid,msaffitz/mongoid,fbernier/mongoid,herimedia/mongoid,rubrikkfabrikken/mongoid,cavneb/mongoid,mash-ltd/mongoid,Zhomart/mongoid,elia/mongoid,greggroth/mongoid,ono/mongoid,tetsuo692/mongoid,camallen/mongoid,tanordheim/mongoid,mitijain123/mongoid,teaforthecat/mongoid,arnkorty/mongoid,luxerama/mongoid,leemhenson/mongoid,sujal/mongoid,javmorin/mongoid,fortnightlabs/mongoid,bencrouse/mongoid,sideci-sample/sideci-sample-mongoid,irakli-janiashvili/mongoid,kay-kim/mongoid,kevinmarvin/mongoid,parov/mongoid,stnguyen/mongoid,mzsanford/mongoid,railsjedi/mongoid,hadees/mongoid,christiannelson/mongoid,haihappen/mongoid,sepastian/mongoid,ebeigarts/mongoid,gicappa/mongoid,dbkbali/mongoid,camallen/mongoid,X0nic/mongoid,hfwang/mongoid,ches/mongoid,chriseppstein/mongoid,CIRCUITLLC/mongoid,zanker/mongoid,dustinwatson/mongoid,bigbenli/mongoid,cleishm/mongoid,mikerobe/mongoid,alexrothenberg/mongoid,subhashb/mongoid,hashrocketeer/mongoid,flexoid/mongoid,mschulkind/mongoid,jakcharlton/mongoid,canvas-drw/mongoid,kcdragon/mongoid,rafaelgaspar/mongoid,mgartner/mongoid,dblock/mongoid,estolfo/mongoid,kentaroi/mongoid,JonRowe/mongoid,kuadrosx/mongoid,balauru/mongoid,matadon/mongoid,cmartyn/mongoid,atomical/mongoid,SumeruSoftware/mongoid,byroot/mongoid,skiz/mongoid,env0der/mongoid,brettgoulder/mongoid-1,dlt/mongoid,absperf/mongoid,krasnoukhov/mongoid,dferdian/mongoid,MSNexploder/mongoid,tanordheim/mongoid,uranazo/mongoid,mhs/mongoid,skippy/mongoid,mhs/mongoid,KoanHealth/mongoid,xinuc/mongoid,dferdian/mongoid,irakli-janiashvili/mongoid,glebtv/mongoid,envylabs/mongoid,mongodb/mongoid,zBMNForks/mongoid,EqualMedia/mongoid,crealytics/mongoid,potatosalad/mongoid,jpfuentes2/mongoid,leedo/mongoid,hubertlepicki/mongoid,dannguyen/mongoid,johnny-miyake/mongoid,luxerama/mongoid,nfo/mongoid,sikachu/mongoid,cao7113/mongoid,lowang/mongoid,rosylilly/mongoid,robwil/mongoid,uniiverse/mongoid,HeeL/mongoid-1,infiverve/mongoid,akm/mongoid,genexp/mongoid,rafaelfranca/mongoid,javmorin/mongoid,colinyoung/mongoid,maxd/mongoid,sikachu/mongoid,parov/mongoid,jim/mongoid,jiren/mongoid,hxx/mongoid,fujimura/mongoid,evendis/mongoid,lowang/mongoid,mysociety/mongoid,christiannelson/mongoid,akreiling/mongoid,praecipula/mongoid,hookercookerman/mongoid,charliehq/mongoid,aj0strow/mongoid,socialreferral/mongoid,bjori/mongoid,greggroth/mongoid,caiofilipini/mongoid,grimen/mongoid,justinko/mongoid,tolsen/mongoid,infiverve/mongoid,tetsuo692/mongoid,FestivalBobcats/mongoid,tvon/mongoid,shingara/mongoid,hbakhtiyor/mongoid,abezzub/mongoid,mysociety/mongoid,lackac/mongoid,rafaelfranca/mongoid,iGoDigital-LLC/mongoid,dsachitano/mongoid,fredjean/mongoid,rogerz42892/mongoid,colinyoung/mongoid,brynary/mongoid,nagachika/mongoid,dakatsuka/mongoid,imomoisoft/mongoid,zenjoy/mongoid,ebeigarts/mongoid,sporkd/mongoid,sevos/mongoid,msaffitz/mongoid,ginty/mongoid,mgolovnia/mongoid,Exoth/mongoid,Numerico/mongoid,joshleitzel/mongoid,semaperepelitsa/mongoid,bjori/mongoid,jetthoughts/mongoid,toppan-forms/mongoid,mattconnolly/mongoid,nagachika/mongoid,zenjoy/mongoid,mathieuravaux/mongoid,gullitmiranda/mongoid,kuruma-gs/mongoid,mash-ltd/mongoid,ElvinEfendi/mongoid,evansagge/mongoid,jonhyman/mongoid,nicolasblanco/mongoid,paulrosania/mongoid,matsimitsu/mongoid,Tickaroo/mongoid2,potatosalad/mongoid,kay-kim/mongoid,pkieltyka/mongoid,teaforthecat/mongoid,kryzhovnik/mongoid,joelcogen/mongoid,Spaceghost/mongoid,500px/mongoid,apptentive-engineering/mongoid,lucasas/mongoid,eljojo/mongoid,fortnightlabs/mongoid,jeyb/mongoid,chetan/mongoid,spiegela/mongoid,neerfri/mongoid,dannguyen/mongoid,500px/mongoid,janroesner/mongoid,lawrencecurtis/mongoid,slbug/mongoid,mschulkind/mongoid,hadees/mongoid,abscondment/mongoid,cmpolis/mongoid,mulder/mongoid,X0nic/mongoid,adyard/mongoid,dcu/mongoid,jasonsydes/mongoid,tagliala/mongoid,cpuguy83/mongoid,matsimitsu/mongoid,asantamar/mongoid,razum2um/mongoid,mitio/mongoid,Flameeyes/mongoid,mongoid/mongoid,skyeagle/mongoid,brettgoulder/mongoid-1,mikerobe/mongoid,akreiling/mongoid,tagliala/mongoid,Sharevari-Inc/mongoid,etomic/mongoid,jasl/mongoid,dlt/mongoid,stevebartholomew/mongoid,kevinmarvin/mongoid,justinko/mongoid,sivagollapalli/mongoid,Aupajo/mongoid-1,sepastian/mongoid,mulder/mongoid,HeeL/mongoid-1,andreychernih/mongoid,Speakol/mongoid,grossws/mongoid,nullstyle/mongoid,hashrocketeer/mongoid,tzar/mongoid,abscondment/mongoid,aagrawal2001/mongoid,rogerz42892/mongoid,bencrouse/mongoid,SumeruSoftware/mongoid,aleksclark/mongoid,piotrj/mongoid,fredjean/mongoid,shotoso/mongoid,kayakyakr/mongoid,leedo/mongoid,johnnyshields/mongoid,incorvia/mongoid,kostyantyn/mongoid,mzsanford/mongoid,afeld/mongoid,jetthoughts/mongoid,nextmat/mongoid,sukeerthiadiga/mongoid,manikandan-kandasamy/mongoid,karmakaze/mongoid,EqualMedia/mongoid,aleksclark/mongoid,ErisExchange/mongoid,jakcharlton/mongoid,eljojo/mongoid,rosylilly/mongoid,kuadrosx/mongoid,hubertlepicki/mongoid,hfwang/mongoid,elia/mongoid,subhashb/mongoid,britto/mongoid,lawrencecurtis/mongoid,canavese/mongoid,jeffreyiacono/mongoid,neerfri/mongoid,wuboy0307/mongoid,corpgovrisk/mongoid,Spaceghost/mongoid,mongodb/mongoid,anuprit/mongoid,maxd/mongoid,aileron/mongoid,jasl/mongoid,estolfo/mongoid,joshsoftware/mongoid,bearded/mongoid,genexp/mongoid,jbrien/mongoid,notxarb/mongoid,dcu/mongoid,korishev/mongoid,anuprit/mongoid,cgriego/mongoid,robotmay/mongoid,simi/mongoid,demarque/mongoid,canavese/mongoid,afeld/mongoid,florent/mongoid,crowdtap/mongoid,astjohn/mongoid,Exoth/mongoid,jamesalmond/mongoid,chetan/mongoid,mgartner/mongoid,uranazo/mongoid,abezzub/mongoid,andreychernih/mongoid,drobune/mongoid,ahoward/mongoid,janroesner/mongoid,4pcbr/mongoid,dsachitano/mongoid,capnregex/mongoid,derekharmel/mongoid,envylabs/mongoid,kslazarev/mongoid,socialreferral/mongoid,DanielVartanov/mongoid,jseibert/mongoid,kentaroi/mongoid,spiegela/mongoid,ginty/mongoid,bobbytables/mongoid,captain-lucas/mongoid,bobbytables/mongoid,mehowte/mongoid,sporkd/mongoid,glebtv/mongoid,kostyantyn/mongoid,balauru/mongoid,franc/mongoid,canvas-drw/mongoid,PerfectMemory/mongoid,alex-klepa/mongoid,HRNewMedia/mongoid,joshleitzel/mongoid,kcdragon/mongoid,grossws/mongoid,asaaki/mongoid,kslazarev/mongoid,Codas/mongoid,hookercookerman/mongoid,nfo/mongoid,eddanger/mongoid,MadRabbit/mongoid,evansagge/mongoid,KoanHealth/mongoid,77Agency/mongoid,marcweil/mongoid,Welovroi/mongoid,jtescher/mongoid,travis-repos/mongoid,codedogfish/mongoid,manuelmorales/mongoid,jim/mongoid,sserdyuk/mongoid,alexandru-calinoiu/mongoid,derickbailey/mongoid,haihappen/mongoid,koraktor/mongoid,arunagw/mongoid,iboard/mongoid-1,ElvinEfendi/mongoid,jetheredge/mongoid,sideci-sample/sideci-sample-mongoid,fbernier/mongoid,yuuna/mongoid,crowdtap/mongoid,nextmat/mongoid,akirasosa/mongoid,voldy/mongoid,jordoh/mongoid,wyattisimo/mongoid,albus522/mongoid,hxx/mongoid,trmmy/mongoid,lucasas/mongoid,nickhoffman/mongoid,niedhui/mongoid,PerfectMemory/mongoid,jmaicher/mongoid,matbox/mongoid,romanbsd/mongoid,tolsen/mongoid,tvon/mongoid,johnnyshields/mongoid,mitijain123/mongoid,jeyb/mongoid,kuruma-gs/mongoid,gregory-m/mongoid,theirishpenguin/mongoid,herimedia/mongoid,icambron/mongoid,rinmu/mongoid,jstrocel/mongoid,loginx/mongoid,iGoDigital-LLC/mongoid,drobune/mongoid,akirasosa/mongoid,rymai/mongoid,niedhui/mongoid,joneslee85/mongoid,jordoh/mongoid,ahoward/mongoid,mattconnolly/mongoid,nviennot/mongoid,marcweil/mongoid,i0rek/mongoid,4pcbr/mongoid,nusco/mongoid,nusco/mongoid,aagrawal2001/mongoid,stellard/mongoid,bigbenli/mongoid,rpocklin/mongoid,Sharevari-Inc/mongoid,ryanong/mongoid,jordelver/mongoid,ganlron/mongoid,apptentive-engineering/mongoid,flexoid/mongoid,franc/mongoid,icambron/mongoid,itbakery/mongoid,narutosanjiv/mongoid,xentek/mongoid,jtescher/mongoid,tombruijn/mongoid,narutosanjiv/mongoid,manuelmorales/mongoid,rebelhold/mongoid,FestivalBobcats/mongoid,alexrothenberg/mongoid,codedmart/mongoid,robwil/mongoid,goshakkk/mongoid,notxarb/mongoid,akm/mongoid,blackxored/mongoid,atomical/mongoid,getaroom/mongoid,alexandru-calinoiu/mongoid,derickbailey/mongoid,dnd/mongoid,timgluz/mongoid,bdmac/mongoid,zaithottakath/mongoid,freerange/mongoid,charliehq/mongoid,jeffreyiacono/mongoid,mehowte/mongoid,cncolder/mongoid,lackac/mongoid,malditogeek/mongoid,cgriego/mongoid,arnkorty/mongoid,Empact/mongoid,travis-repos/mongoid,sevos/mongoid,Shop2market/mongoid,flyerhzm/mongoid,Subskii/mongoid,codedogfish/mongoid,jpfuentes2/mongoid,karmakaze/mongoid,robinst/mongoid,paulrosania/mongoid,tricknotes/mongoid,cavneb/mongoid,drfeelngood/mongoid,Azzurrio/mongoid,etomic/mongoid,stevebartholomew/mongoid,rafaelgaspar/mongoid,joneslee85/mongoid,outoftime/mongoid,Winslett/mongoid,MSNexploder/mongoid,tombruijn/mongoid,Azzurrio/mongoid,slbug/mongoid,mongoid/mongoid,LastStar/mongoid,manikandan-kandasamy/mongoid,jmaicher/mongoid,simi/mongoid,itbakery/mongoid,arunagw/mongoid,DouweM/mongoid,likealittle/mongoid,bearded/mongoid,nickhoffman/mongoid,aj0strow/mongoid,amw/mongoid,moretea/mongoid,ealdent/mongoid,skiz/mongoid,rmm5t/mongoid,shotoso/mongoid,gicappa/mongoid,rinmu/mongoid,eddanger/mongoid,malditogeek/mongoid,uniiverse/mongoid,demarque/mongoid,adyard/mongoid,blackxored/mongoid,aileron/mongoid,idesaku/mongoid,captain-lucas/mongoid,flada-auxv/mongoid,kryzhovnik/mongoid,dbkbali/mongoid,voldy/mongoid,gullitmiranda/mongoid,crealytics/mongoid,yuuna/mongoid,cpuguy83/mongoid,skippy/mongoid,zBMNForks/mongoid,chriseppstein/mongoid,Numerico/mongoid,sserdyuk/mongoid,flyerhzm/mongoid,asantamar/mongoid,sukeerthiadiga/mongoid,derekharmel/mongoid,corpgovrisk/mongoid,zaithottakath/mongoid,joelcogen/mongoid,goshakkk/mongoid,britto/mongoid,jseibert/mongoid,kayakyakr/mongoid,incorvia/mongoid,johnny-miyake/mongoid,ryanong/mongoid,korishev/mongoid,zanker/mongoid,Welovroi/mongoid