Single table for file attachments (#7420)

* Add basic model for handling generic attachments

* Refactor migration

* Data migration to convert old files across

* Admin updates

* Increase comment field max_length

* Adjust field name

* Remove legacy serializer classes / endpoints

* Expose new model to API

* Admin site list filters

* Remove legacy attachment models

- Add new mixin class to designate which models can have attachments

* Update data migration

- Ensure other apps are at the correct migration state beforehand

* Add migrations to remove legacy attachment tables

* Fix for "rename_attachment" callback

* Refactor model_type field

- ContentType does not allow easy API serialization

* Set allowed options for admin

* Update model verbose names

* Fix logic for file upload

* Add choices for serializer

* Add API filtering

* Fix for API filter

* Fix for attachment tables in PUI

- Still not solved permission issues

* Bump API version

* Record user when uploading attachment via API

* Refactor <AttachmentTable /> for PUI

* Display 'file_size' in PUI attachment table

* Fix company migrations

* Include permission informtion in roles API endpoint

* Read user permissions in PUI

* Simplify permission checks for <AttachmentTable />

* Automatically clean up old content types

* Cleanup PUI

* Fix typo in data migration

* Add reverse data migration

* Update unit tests

* Use InMemoryStorage for media files in test mode

* Data migration unit test

* Fix "model_type" field

- It is a required field after all

* Add permission check for serializer

* Fix permission check for CUI

* Fix PUI import

* Test python lib against specific branch

- Will be reverted once code is merged

* Revert STORAGES setting

- Might be worth looking into again

* Fix part unit test

* Fix unit test for sales order

* Use 'get_global_setting'

* Use 'get_global_setting'

* Update setting getter

* Unit tests

* Tweaks

* Revert change to settings.py

* More updates for get_global_setting

* Relax API query count requirement

* remove illegal chars and add unit tests

* Fix unit tests

* Fix frontend unit tests

* settings management updates

* Prevent db write under more conditions

* Simplify settings code

* Pop values before creating filters

* Prevent settings write under certain conditions

* Add debug msg

* Clear db on record import

* Refactor permissions checks

- Allows extension / customization of permission checks at a later date

* Unit test updates

* Prevent delete of attachment without correct permissions

* Adjust odcker.yaml

* Cleanup data migrations

* Tweak migration tests for build app

* Update data migration

- Handle case with missing data

* Prevent debug shell in TESTING mode

* Update migration dependencies

- Ensure all apps are "up to date" before removing legacy tables

* add file size test

* Update migration tests

* Revert some settings caching changes

* Fix incorrect logic in migration

* Update unit tests

* Prevent create on CURRENCY_CODES

- Seems to play havoc with bootup sequence

* Fix unit test

* Some refactoring

- Use get_global_setting

* Fix typo

* Revert change

* Add "tags" and "metadata"

* Include "tags" field in API serializer

* add "metadata" endpoint for attachments

tasks.py

@@ -462,6 +462,7 @@ def migrate(c):
     manage(c, 'makemigrations')
     manage(c, 'runmigrations', pty=True)
     manage(c, 'migrate --run-syncdb')
+    manage(c, 'remove_stale_contenttypes --include-stale-apps --no-input', pty=True)
 
     print('========================================')
     print('InvenTree database migrations completed!')