in the db/migrate directory ,there are five files(001--005),so i think
the top version should be 5,right?
but,the problem is :
when i run the "rake migrate"command,it always migrate to VERSION
2(NOT 5).And my schema.rb file also be modified to version 2.so
when i run "rake migrate version=5" command which i take the
argument,then it succed to version 5.
how can explain the problem?