dont call up new session unless save_on_init
dont call up new session unless save_on_init

bootandy/sqlalchemy,brianv0/sqlalchemy,j5int/sqlalchemy,Cito/sqlalchemy,bdupharm/sqlalchemy,davidfraser/sqlalchemy,sqlalchemy/sqlalchemy,brianv0/sqlalchemy,robin900/sqlalchemy,elelianghh/sqlalchemy,monetate/sqlalchemy,alex/sqlalchemy,graingert/sqlalchemy,wujuguang/sqlalchemy,alex/sqlalchemy,Cito/sqlalchemy,dstufft/sqlalchemy,wujuguang/sqlalchemy,itkovian/sqlalchemy,elelianghh/sqlalchemy,davidfraser/sqlalchemy,ThiefMaster/sqlalchemy,pdufour/sqlalchemy,epa/sqlalchemy,wfxiang08/sqlalchemy,monetate/sqlalchemy,robin900/sqlalchemy,WinterNis/sqlalchemy,inspirehep/sqlalchemy,Cito/sqlalchemy,inspirehep/sqlalchemy,alex/sqlalchemy,276361270/sqlalchemy,halfcrazy/sqlalchemy,dstufft/sqlalchemy,bdupharm/sqlalchemy,ThiefMaster/sqlalchemy,itkovian/sqlalchemy,davidjb/sqlalchemy,Akrog/sqlalchemy,j5int/sqlalchemy,pdufour/sqlalchemy,bootandy/sqlalchemy,hsum/sqlalchemy,sandan/sqlalchemy,graingert/sqlalchemy,hsum/sqlalchemy,olemis/sqlalchemy,davidjb/sqlalchemy,sandan/sqlalchemy,Akrog/sqlalchemy,olemis/sqlalchemy,276361270/sqlalchemy,epa/sqlalchemy,wfxiang08/sqlalchemy,zzzeek/sqlalchemy,EvaSDK/sqlalchemy,WinterNis/sqlalchemy,EvaSDK/sqlalchemy,halfcrazy/sqlalchemy