First, get a CSV in the right format. The first two lines might look like:
Email,School 1,Career 1,School 2,Career 2,School 3,Career 3,Ug Social Class Long Desc,Coterm UG Group Ind,Coterm GR Group Ind,SUNet ID
glikbarg@stanford.edu,School of Engineering,Graduate,,,,,-,N,Y,glikbarg
Now, run heroku exec to open a shell on the running dyno.
Navigate to /import in your browser, and upload your .csv file. It will save a copy to storage/<file>.csv
Once you hit upload, check it's there: ls storage/ in the dyno shell
Now, to run rake tasks, we need to get a copy of the rails ENV:
set -a
source <(cat /proc/$(pgrep -f "rails server")/environ | strings)
This pulls the env from the rails server and applies it to your ssh shell Now, install the new data:
/bin/bash -l -c "bin/rake import:enrollment_data\['storage/<file>.csv'\]"
This should spin for a bit, output messages about edge-case users with odd enrollment status, and conclude Imported 16962 user records!