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28b2ce0eaf
Like e45c61d6f0, but for .project.
I originally thought `SET_NULL` would be a good way to "do stuff later", but
that's only so the degree that [1] updates are cheaper than deletes and [2]
2nd-order effects (further deletes in the dep-tree) are avoided.
Now that we have explicit Project-deletion (deps-first, delayed, properly batched)
the SET_NULL behavior is always a no-op (but with cost in queries).
As a result, in the test for project deletion (which has deletes for many
of the altered models), the following 12 queries are no longer done:
```
SELECT "projects_project"."id", [..many fields..] FROM "projects_project" WHERE "projects_project"."id" = 1
DELETE FROM "projects_projectmembership" WHERE "projects_projectmembership"."project_id" IN (1)
DELETE FROM "alerts_messagingserviceconfig" WHERE "alerts_messagingserviceconfig"."project_id" IN (1)
UPDATE "releases_release" SET "project_id" = NULL WHERE "releases_release"."project_id" IN (1)
UPDATE "issues_issue" SET "project_id" = NULL WHERE "issues_issue"."project_id" IN (1)
UPDATE "issues_grouping" SET "project_id" = NULL WHERE "issues_grouping"."project_id" IN (1)
UPDATE "events_event" SET "project_id" = NULL WHERE "events_event"."project_id" IN (1)
UPDATE "tags_tagkey" SET "project_id" = NULL WHERE "tags_tagkey"."project_id" IN (1)
UPDATE "tags_tagvalue" SET "project_id" = NULL WHERE "tags_tagvalue"."project_id" IN (1)
UPDATE "tags_eventtag" SET "project_id" = NULL WHERE "tags_eventtag"."project_id" IN (1)
UPDATE "tags_issuetag" SET "project_id" = NULL WHERE "tags_issuetag"."project_id" IN (1)
```
19 lines
706 B
Python
19 lines
706 B
Python
from django.db import models
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from projects.models import Project
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from .service_backends.slack import SlackBackend
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class MessagingServiceConfig(models.Model):
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project = models.ForeignKey(Project, on_delete=models.DO_NOTHING, related_name="service_configs")
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display_name = models.CharField(max_length=100, blank=False,
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help_text='For display in the UI, e.g. "#general on company Slack"')
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kind = models.CharField(choices=[("slack", "Slack (or compatible)"), ], max_length=20, default="slack")
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config = models.TextField(blank=False)
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def get_backend(self):
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# once we have multiple backends: lookup by kind.
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return SlackBackend(self)
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