ruby on rails - how to get number of last migration run in heroku? -


i'm trying debug app on heroku , seems 1 or more migrations didn't run. without going through each migration manually i'm trying figure out migration last 1 run.

environment: rails, postgresql

from terminal: 

 heroku pg:psql --app app_name db_name  select * schema_migrations;

look last entry

another way... terminal

 heroku run console --app app_name  class schemamigration<activerecord::base  end

then write 

 schemamigration.last

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