add a note to use column_property with declarative map to a join
add a note to use column_property with declarative map to a join

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