oncall-engine/engine/apps/oss_installation
Vadim Stepanov b2f4ffb98a
apps.get_model -> import (#2619)
# What this PR does

Remove
[`apps.get_model`](https://docs.djangoproject.com/en/3.2/ref/applications/#django.apps.apps.get_model)
invocations and use inline `import` statements in places where models
are imported within functions/methods to avoid circular imports.

I believe `import` statements are more appropriate for most use cases as
they allow for better static code analysis & formatting, and solve the
issue of circular imports without being unnecessarily dynamic as
`apps.get_model`. With `import` statements, it's possible to:

- Jump to model definitions in most IDEs
- Automatically sort inline imports with `isort`
- Find import errors faster/easier (most IDEs highlight broken imports)
- Have more consistency across regular & inline imports when importing
models

This PR also adds a flake8 rule to ban imports of `django.apps.apps`, so
it's harder to use `apps.get_model` by mistake (it's possible to ignore
this rule by using `# noqa: I251`). The rule is not enforced on
directories with migration files, because `apps.get_model` is often used
to get a historical state of a model, which is useful when writing
migrations ([see this SO answer for more
details](https://stackoverflow.com/a/37769213)). So `apps.get_model` is
considered OK in migrations (even necessary in some cases).

## Checklist

- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
2023-07-25 09:43:23 +00:00
..
migrations Add database migrations linter (#1020) 2023-02-06 16:01:37 +08:00
models continue addressing mypy violations (#2170) 2023-06-27 10:23:08 +00:00
serializers Add cloud connection statuses on user page (#34) 2022-06-13 16:29:08 +04:00
tests Allow viewers fetch cloud connection status (#1181) 2023-01-23 11:17:57 +00:00
views augment API response pagination attributes (#2471) 2023-07-14 11:19:40 -04:00
__init__.py World, meet OnCall! 2022-06-03 08:09:47 -06:00
cloud_heartbeat.py apps.get_model -> import (#2619) 2023-07-25 09:43:23 +00:00
constants.py Make CloudConnection instance wide 2022-06-06 16:02:09 +04:00
tasks.py apps.get_model -> import (#2619) 2023-07-25 09:43:23 +00:00
urls.py Allow viewers fetch cloud connection status (#1181) 2023-01-23 11:17:57 +00:00
usage_stats.py apps.get_model -> import (#2619) 2023-07-25 09:43:23 +00:00
utils.py apps.get_model -> import (#2619) 2023-07-25 09:43:23 +00:00