chage `date_time` type ` to `datetime`
chage `date_time` type ` to `datetime`

Since we are using `datetime` in migration, better to use `datetime` is I think that confusion is less.

kamipo/rails,tgxworld/rails,illacceptanything/illacceptanything,iainbeeston/rails,schuetzm/rails,yhirano55/rails,rossta/rails,yahonda/rails,fabianoleittes/rails,illacceptanything/illacceptanything,shioyama/rails,mtsmfm/railstest,odedniv/rails,rafaelfranca/omg-rails,vassilevsky/rails,rails/rails,sealocal/rails,ledestin/rails,yhirano55/rails,Stellenticket/rails,tgxworld/rails,riseshia/railsguides.kr,lucasmazza/rails,rossta/rails,illacceptanything/illacceptanything,kaspth/rails,ledestin/rails,marklocklear/rails,coreyward/rails,amoody2108/TechForJustice,kddeisz/rails,odedniv/rails,yasslab/railsguides.jp,notapatch/rails,vipulnsward/rails,prathamesh-sonpatki/rails,felipecvo/rails,kirs/rails-1,mohitnatoo/rails,ttanimichi/rails,alecspopa/rails,yahonda/rails,Stellenticket/rails,voray/rails,bogdanvlviv/rails,mtsmfm/railstest,aditya-kapoor/rails,tjschuck/rails,repinel/rails,MSP-Greg/rails,mechanicles/rails,utilum/rails,eileencodes/rails,lcreid/rails,sealocal/rails,kmcphillips/rails,maicher/rails,rbhitchcock/rails,ngpestelos/rails,joonyou/rails,kachick/rails,riseshia/railsguides.kr,tgxworld/rails,maicher/rails,xlymian/rails,yalab/rails,shioyama/rails,gfvcastro/rails,sergey-alekseev/rails,yasslab/railsguides.jp,ngpestelos/rails,palkan/rails,mijoharas/rails,illacceptanything/illacceptanything,odedniv/rails,MichaelSp/rails,kachick/rails,georgeclaghorn/rails,vipulnsward/rails,esparta/rails,printercu/rails,baerjam/rails,kenta-s/rails,arjes/rails,alecspopa/rails,eileencodes/rails,arunagw/rails,Spin42/rails,printercu/rails,georgeclaghorn/rails,alecspopa/rails,fabianoleittes/rails,kachick/rails,rbhitchcock/rails,Erol/rails,betesh/rails,starknx/rails,jeremy/rails,mechanicles/rails,yasslab/railsguides.jp,ledestin/rails,kmayer/rails,mohitnatoo/rails,amoody2108/TechForJustice,arjes/rails,mathieujobin/reduced-rails-for-travis,tgxworld/rails,untidy-hair/rails,palkan/rails,EmmaB/rails-1,utilum/rails,tjschuck/rails,Erol/rails,pvalena/rails,joonyou/rails,Stellenticket/rails,bogdanvlviv/rails,riseshia/railsguides.kr,bolek/rails,hanystudy/rails,betesh/rails,matrinox/rails,matrinox/rails,gfvcastro/rails,flanger001/rails,tijwelch/rails,richseviora/rails,jeremy/rails,deraru/rails,illacceptanything/illacceptanything,kddeisz/rails,samphilipd/rails,bolek/rails,yasslab/railsguides.jp,kenta-s/rails,voray/rails,pschambacher/rails,schuetzm/rails,Edouard-chin/rails,marklocklear/rails,untidy-hair/rails,felipecvo/rails,mohitnatoo/rails,illacceptanything/illacceptanything,MSP-Greg/rails,sergey-alekseev/rails,kmcphillips/rails,amoody2108/TechForJustice,bradleypriest/rails,mtsmfm/rails,Envek/rails,illacceptanything/illacceptanything,betesh/rails,Erol/rails,kamipo/rails,bogdanvlviv/rails,Spin42/rails,iainbeeston/rails,repinel/rails,mtsmfm/rails,bogdanvlviv/rails,lcreid/rails,jeremy/rails,rafaelfranca/omg-rails,koic/rails,travisofthenorth/rails,brchristian/rails,shioyama/rails,MSP-Greg/rails,BlakeWilliams/rails,EmmaB/rails-1,mathieujobin/reduced-rails-for-travis,vipulnsward/rails,BlakeWilliams/rails,gauravtiwari/rails,richseviora/rails,aditya-kapoor/rails,prathamesh-sonpatki/rails,flanger001/rails,Envek/rails,illacceptanything/illacceptanything,notapatch/rails,kmayer/rails,utilum/rails,yawboakye/rails,kamipo/rails,mijoharas/rails,Stellenticket/rails,notapatch/rails,jeremy/rails,stefanmb/rails,shioyama/rails,gfvcastro/rails,matrinox/rails,kaspth/rails,yawboakye/rails,gcourtemanche/rails,tijwelch/rails,rails/rails,ngpestelos/rails,bolek/rails,illacceptanything/illacceptanything,untidy-hair/rails,sealocal/rails,palkan/rails,xlymian/rails,yawboakye/rails,esparta/rails,assain/rails,elfassy/rails,betesh/rails,kirs/rails-1,samphilipd/rails,stefanmb/rails,fabianoleittes/rails,kmcphillips/rails,eileencodes/rails,fabianoleittes/rails,kddeisz/rails,utilum/rails,felipecvo/rails,vassilevsky/rails,Vasfed/rails,mijoharas/rails,mechanicles/rails,kaspth/rails,lucasmazza/rails,schuetzm/rails,samphilipd/rails,kenta-s/rails,yhirano55/rails,BlakeWilliams/rails,flanger001/rails,Sen-Zhang/rails,Spin42/rails,esparta/rails,voray/rails,tijwelch/rails,yalab/rails,rails/rails,koic/rails,EmmaB/rails-1,baerjam/rails,illacceptanything/illacceptanything,arunagw/rails,Sen-Zhang/rails,marklocklear/rails,lucasmazza/rails,coreyward/rails,eileencodes/rails,mohitnatoo/rails,illacceptanything/illacceptanything,gavingmiller/rails,assain/rails,printercu/rails,starknx/rails,repinel/rails,Edouard-chin/rails,yalab/rails,gcourtemanche/rails,Envek/rails,MichaelSp/rails,richseviora/rails,sergey-alekseev/rails,bradleypriest/rails,mtsmfm/rails,flanger001/rails,pschambacher/rails,gavingmiller/rails,gauravtiwari/rails,deraru/rails,illacceptanything/illacceptanything,arunagw/rails,joonyou/rails,travisofthenorth/rails,lcreid/rails,tjschuck/rails,stefanmb/rails,gavingmiller/rails,pvalena/rails,assain/rails,brchristian/rails,deraru/rails,pschambacher/rails,hanystudy/rails,yhirano55/rails,prathamesh-sonpatki/rails,yahonda/rails,georgeclaghorn/rails,assain/rails,illacceptanything/illacceptanything,pvalena/rails,joonyou/rails,Sen-Zhang/rails,Edouard-chin/rails,bradleypriest/rails,maicher/rails,gauravtiwari/rails,iainbeeston/rails,kddeisz/rails,kmcphillips/rails,yawboakye/rails,schuetzm/rails,rafaelfranca/omg-rails,aditya-kapoor/rails,elfassy/rails,gcourtemanche/rails,notapatch/rails,printercu/rails,mtsmfm/railstest,vassilevsky/rails,baerjam/rails,riseshia/railsguides.kr,rails/rails,elfassy/rails,pvalena/rails,vipulnsward/rails,coreyward/rails,mechanicles/rails,ttanimichi/rails,MSP-Greg/rails,yalab/rails,Envek/rails,repinel/rails,travisofthenorth/rails,ttanimichi/rails,palkan/rails,MichaelSp/rails,brchristian/rails,esparta/rails,deraru/rails,illacceptanything/illacceptanything,iainbeeston/rails,koic/rails,Vasfed/rails,Vasfed/rails,starknx/rails,hanystudy/rails,illacceptanything/illacceptanything,prathamesh-sonpatki/rails,kmayer/rails,untidy-hair/rails,travisofthenorth/rails,arjes/rails,Erol/rails,xlymian/rails,lcreid/rails,gfvcastro/rails,Vasfed/rails,arunagw/rails,yahonda/rails,baerjam/rails,kirs/rails-1,rbhitchcock/rails,Edouard-chin/rails,mathieujobin/reduced-rails-for-travis,georgeclaghorn/rails,rossta/rails,aditya-kapoor/rails,BlakeWilliams/rails,tjschuck/rails