Opened 11 months ago
Closed 11 months ago
#35047 closed Bug (invalid)
Wrong sql query for migration
Reported by: | mgoldenbe | Owned by: | nobody |
---|---|---|---|
Component: | Migrations | Version: | 3.2 |
Severity: | Normal | Keywords: | sqlmigrate |
Cc: | Triage Stage: | Unreviewed | |
Has patch: | no | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | no | UI/UX: | no |
Description (last modified by )
I had the model:
class UserInfo(models.Model): user = models.ForeignKey(User, related_name='user_info', on_delete=CASCADE) picture = models.URLField(null = True, blank = True) paying = models.BooleanField(default = False) credits = models.DecimalField(max_digits=6, decimal_places=2) expiry = models.DateTimeField() usd_per_credit = models.FloatField(null = True, blank = True) content_count = models.IntegerField(default=0) suspended = models.BooleanField(default = False) suspended_request = models.TextField(null = True, blank = True) suspended_timestamp = models.DateTimeField(null = True, blank = True) def __str__(self): return str(self.user)
Then I changed the usd_per_credit
field to be
usd_per_credit = models.FloatField(default = 0.00)
After running makemigrations
and migrate
, I ran sqlmigrate
and got the following:
BEGIN; -- -- Alter field usd_per_credit on userinfo -- ALTER TABLE "accounts_userinfo" ALTER COLUMN "usd_per_credit" SET DEFAULT 0.0; UPDATE "accounts_userinfo" SET "usd_per_credit" = 0.0 WHERE "usd_per_credit" IS NULL; ALTER TABLE "accounts_userinfo" ALTER COLUMN "usd_per_credit" SET NOT NULL; ALTER TABLE "accounts_userinfo" ALTER COLUMN "usd_per_credit" DROP DEFAULT; COMMIT;
The last line before COMMIT is wrong. It drops the default value which was correctly set.
Change History (3)
comment:1 by , 11 months ago
Description: | modified (diff) |
---|
comment:2 by , 11 months ago
comment:3 by , 11 months ago
Resolution: | → invalid |
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Status: | new → closed |
Field.default
doesn't set a permanent default at the database level. In this case, it is set temporarily to populate existing rows. To use a permanent database default, use Field.db_default (new in Django 5.0).
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