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Derrick Kearney
2,962 PointsMigrate is Failing - Asking Multiple Choice django.db.utils.OperationalError: no such table: courses_step
I am working through, start to finish on the forms. When we amended Step to abstract I started getting the following error. django.db.utils.OperationalError: no such table: courses_step
I compared my code against models.py from the downloaded code, used diff at the command line and my code is identical. I thought it might be the database so I copied the existing database from the example code the first time this happened. Re ran the makemigrations and migrate, and it worked.
I thought it was solved, I was mistaken.
When I added class MultipleChoiceQuestion and ran migrate, the error appeared again. no such table: courses_step
My models. py is here https://ghostbin.com/paste/j72dx
The traceback is here: https://ghostbin.com/paste/ch6nd I am working and taking this course, so maybe I am missing something simple.
Derrick Kearney
2,962 PointsChris,
./manage.py makemigrations courses
No changes detected in app 'courses'
django-admin showmigrations
https://ghostbin.com/paste/4tcgb
Chris Freeman
Treehouse Moderator 68,441 Pointsdjango-admin doesn't have your settings defined. Please use
$ ./manage.py showmigrations --list
Derrick Kearney
2,962 Pointshere it is, ./manage.py showmigrations --list
[X] 0001_initial
auth
[X] 0001_initial
[X] 0002_alter_permission_name_max_length
[X] 0003_alter_user_email_max_length
[X] 0004_alter_user_username_opts
[X] 0005_alter_user_last_login_null
[X] 0006_require_contenttypes_0002
contenttypes
[X] 0001_initial
[X] 0002_remove_content_type_name
courses
[X] 0001_initial
[X] 0002_step
[X] 0003_auto_20150601_1513
[ ] 0004_auto_20160216_2055
[X] 0005_quiz
[ ] 0006_auto_20160217_1742
[X] 0007_answer
[ ] 0008_multiplechoicequestion
sessions
[X] 0001_initial
Derrick Kearney
2,962 PointsChris, it fails on:
./manage.py migrate courses 0004_auto_20160216_2055
OperationalError: no such table: courses_step
Derrick Kearney
2,962 PointsChris, fyi, I copied a sample S2V4, and I am working off that. That said, I am perplexed as to how to resolve this, but I do not want you and I going down a rabbit hole.
Derrick Kearney
2,962 PointsAgreed Chris, done, and resolved. Thanks. None of your answers fixed it, your comment did.
2 Answers
Chris Freeman
Treehouse Moderator 68,441 PointsPerhaps it's time to start fresh. If you don't have a need to back up to previous versions the courses models, you can choose to clear all 'coursesmigrations (by deleting those files) and re-init the migrations for the ‘courses app. This should reset the migrations to match you current models.
Chris Freeman
Treehouse Moderator 68,441 PointsChanged comment to Answer.
Chris Freeman
Treehouse Moderator 68,441 PointsLooking at your migrations list it appears you have not applied all of the migrations (those with [ ]):
courses
[X] 0001_initial
[X] 0002_step
[X] 0003_auto_20150601_1513
[ ] 0004_auto_20160216_2055
[X] 0005_quiz
[ ] 0006_auto_20160217_1742
[X] 0007_answer
[ ] 0008_multiplechoicequestion
Try resetting the state to before the first skipped migration.
$ ./manage.py migrate courses 0003_auto_20150601_1513
Rerun $ ./manage.py showmigrations courses to verify unapplied (unchecked) migration 0005 and 0007.
Then rerun all unapplied migrations
$ ./manage.py migrate courses
Derrick Kearney
2,962 PointsChris, Thanks for your effort. So I followed your directions exactly.
./manage.py showmigrations courses
courses
[X] 0001_initial
[X] 0002_step
[X] 0003_auto_20150601_1513
[ ] 0004_auto_20160216_2055
[ ] 0005_quiz
[ ] 0006_auto_20160217_1742
[ ] 0007_answer
[ ] 0008_multiplechoicequestion
But that:
django.db.utils.OperationalError: no such table: courses_step
still persists.
Chris Freeman
Treehouse Moderator 68,441 PointsWhat happens when you run each migration, one at a time, starting with
$ ./manage.py migrate courses 0004_auto_20160216_2055
$ ./manage.py migrate courses 0005_quiz
$ ./manage.py migrate courses 0006_auto_20160217_1742
$ ./manage.py migrate courses 0007_answer
$ ./manage.py migrate courses 0008_multiplechoicequestion
Run showmigrations between each step to check all previous were applied.
Chris Freeman
Treehouse Moderator 68,441 PointsChris Freeman
Treehouse Moderator 68,441 PointsCan you post the output of
./manage.py makemigrations coursesand./manage.py showmigrations courses. Or the output of./manage.py makemigrationsand./manage.py showmigrations.