How Do I Clear Qualtrics Results to Start Again
By Vitor Freitas
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How to Reset Migrations
The Django migration organisation was adult and optmized to work with big number of migrations. More often than not yous shouldn't listen to keep a large amount of models migrations in your code base. Fifty-fifty though sometimes it causes some undesired effects, similar consuming much fourth dimension while running the tests. Merely in scenarios like this yous can easily disable the migrations (although at that place is no built-in option for that at the moment).
Anyway, if yous want to perform a clean-up, I volition present a few options in this tutorial.
Scenario 1:
The project is still in the evolution environment and you want to perform a full clean up. You don't mind throwing the whole database away.
1. Remove the all migrations files within your project
Get through each of your projects apps migration folder and remove everything inside, except the __init__.py file.
Or if you are using a unix-similar Bone you can run the post-obit script (within your project dir):
find . -path "*/migrations/*.py" -not -name "__init__.py" -delete observe . -path "*/migrations/*.pyc" -delete two. Drop the current database, or delete the db.sqlite3 if information technology is your instance.
3. Create the initial migrations and generate the database schema:
python manage.py makemigrations python manage.py drift And you are practiced to go.
Scenario 2:
You want to clear all the migration history simply you lot desire to continue the existing database.
ane. Make sure your models fits the current database schema
The easiest manner to do information technology is trying to create new migrations:
python manage.py makemigrations If there are any awaiting migration, apply them showtime.
If you run across the message:
No changes detected Y'all are expert to go.
ii. Clear the migration history for each app
Now you will demand to articulate the migration history app by app.
First run the showmigrations command so we can keep track of what is going on:
$ python manage.py showmigrations Outcome:
admin [X] 0001_initial [10] 0002_logentry_remove_auto_add auth [10] 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 [10] 0007_alter_validators_add_error_messages contenttypes [Ten] 0001_initial [X] 0002_remove_content_type_name core [Ten] 0001_initial [X] 0002_remove_mymodel_i [10] 0003_mymodel_bio sessions [10] 0001_initial Clear the migration history (please note that core is the name of my app):
$ python manage.py drift --fake core zero The issue will be something like this:
Operations to perform: Unapply all migrations: core Running migrations: Rendering model states... DONE Unapplying core.0003_mymodel_bio... FAKED Unapplying core.0002_remove_mymodel_i... FAKED Unapplying core.0001_initial... FAKED At present run the command showmigrations again:
$ python manage.py showmigrations Event:
admin [X] 0001_initial [X] 0002_logentry_remove_auto_add auth [10] 0001_initial [X] 0002_alter_permission_name_max_length [X] 0003_alter_user_email_max_length [10] 0004_alter_user_username_opts [X] 0005_alter_user_last_login_null [X] 0006_require_contenttypes_0002 [X] 0007_alter_validators_add_error_messages contenttypes [Ten] 0001_initial [X] 0002_remove_content_type_name cadre [ ] 0001_initial [ ] 0002_remove_mymodel_i [ ] 0003_mymodel_bio sessions [X] 0001_initial Yous must do that for all the apps you desire to reset the migration history.
3. Remove the actual migration files.
Become through each of your projects apps migration binder and remove everything within, except for the __init__.py file.
Or if yous are using a unix-like Os yous tin can run the post-obit script (inside your project dir):
find . -path "*/migrations/*.py" -not -name "__init__.py" -delete find . -path "*/migrations/*.pyc" -delete PS: The example above volition remove all the migrations file inside your project.
Run the showmigrations again:
$ python manage.py showmigrations Result:
admin [X] 0001_initial [X] 0002_logentry_remove_auto_add 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 [Ten] 0006_require_contenttypes_0002 [X] 0007_alter_validators_add_error_messages contenttypes [X] 0001_initial [Ten] 0002_remove_content_type_name core (no migrations) sessions [X] 0001_initial 4. Create the initial migrations
$ python manage.py makemigrations Issue:
Migrations for 'core': 0001_initial.py: - Create model MyModel 5. False the initial migration
In this case you won't be able to utilize the initial migration because the database table already exists. What we want to do is to fake this migration instead:
$ python manage.py drift --fake-initial Result:
Operations to perform: Apply all migrations: admin, core, contenttypes, auth, sessions Running migrations: Rendering model states... Washed Applying core.0001_initial... FAKED Run showmigrations over again:
admin [Ten] 0001_initial [10] 0002_logentry_remove_auto_add auth [X] 0001_initial [10] 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 [X] 0007_alter_validators_add_error_messages contenttypes [10] 0001_initial [10] 0002_remove_content_type_name cadre [X] 0001_initial sessions [X] 0001_initial And we are all fix upwards :-)
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Source: https://simpleisbetterthancomplex.com/tutorial/2016/07/26/how-to-reset-migrations.html
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