Согласно документации здесь: https://docs.djangoproject.com/en/1.8/topics/migrations/ там написано: migrate, which is responsible for applying migrations, as well as unapplying and listing their status. и makemigrations, which is...

Это Лог. ActiveRecord::SchemaMigration Load (5.0ms) SELECT `schema_migrations`.* FROM `schema_migrations` Unable to load samplero, underlying cause No such file to load -- samplero org/jruby/RubyKernel.java:1065:in `require'...