3YOURMIND / Django Migration Linter
Licence: apache-2.0
🚀 Detect backward incompatible migrations for your django project
Stars: ✭ 231
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Django migration linter
Detect backward incompatible migrations for your Django project. It will save you time by making sure migrations will not break with a older codebase.
Quick installation
pip install django-migration-linter
And add the migration linter your INSTALLED_APPS:
INSTALLED_APPS = [
...,
"django_migration_linter",
...,
]
Usage example
$ python manage.py lintmigrations
(app_add_not_null_column, 0001_create_table)... OK
(app_add_not_null_column, 0002_add_new_not_null_field)... ERR
NOT NULL constraint on columns
(app_drop_table, 0001_initial)... OK
(app_drop_table, 0002_delete_a)... ERR
DROPPING table
(app_ignore_migration, 0001_initial)... OK
(app_ignore_migration, 0002_ignore_migration)... IGNORE
(app_rename_table, 0001_initial)... OK
(app_rename_table, 0002_auto_20190414_1500)... ERR
RENAMING tables
*** Summary ***
Valid migrations: 4/8
Erroneous migrations: 3/8
Migrations with warnings: 0/8
Ignored migrations: 1/8
The linter analysed all migrations from the Django project. It found 3 migrations that are doing backward incompatible operations and 1 that is explicitly ignored. The list of incompatibilities that the linter analyses can be found at docs/incompatibilities.md.
More advanced usages of the linter and options can be found at docs/usage.md.
Integration
One can either integrate the linter in the CI and the lintmigrations command, or detect incompatibilities during generation with
$ python manage.py makemigrations --lint
Migrations for 'app_correct':
tests/test_project/app_correct/migrations/0003_a_column.py
- Add field column to a
Linting for 'app_correct':
(app_correct, 0003_a_column)... ERR
NOT NULL constraint on columns
The migration linter detected that this migration is not be backward compatible.
- If you keep the migration, you will want to fix the issue or ignore the migration.
- By default, the newly created migration file will be deleted.
Do you want to keep the migration? [y/N]
[...]
Deleted tests/test_project/app_correct/migrations/0003_a_column.py
The linter found that the newly created migration is not backward compatible and deletes the files.
This behaviour can be the default of the makemigrations command through the MIGRATION_LINTER_OVERRIDE_MAKEMIGRATIONS Django settings.
Find out more about the makemigrations command at docs/makemigrations.md.
More information
Please find more documentation generally in the docs/ folder.
Some implementation details can found in the ./docs/internals/ folder.
Blog post
They talk about the linter
Related
- django-test-migrations - Test django schema and data migrations, including migrations' order and best practices.
License
django-migration-linter is released under the Apache 2.0 License.
Maintained by David Wobrock
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for each open source project belongs to its rightful owner.
If you wish to add or remove any projects, please contact us at [email protected].