Opened 5 years ago
Closed 5 years ago
#31410 closed Cleanup/optimization (fixed)
Add check for fields of UniqueConstraints.
| Reported by: | Marnanel Thurman | Owned by: | Hasan Ramezani |
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| Component: | Database layer (models, ORM) | Version: | dev |
| Severity: | Normal | Keywords: | |
| Cc: | Ian Foote | Triage Stage: | Accepted |
| Has patch: | yes | Needs documentation: | no |
| Needs tests: | no | Patch needs improvement: | no |
| Easy pickings: | yes | UI/UX: | no |
Description (last modified by )
When a model gains a UniqueConstraint, makemigrations doesn't check that the fields named therein actually exist.
This is in contrast to the older unique_together syntax, which raises models.E012 if the fields don't exist.
In the attached demonstration, you'll need to uncomment "with_unique_together" in settings.py in order to show that unique_together raises E012.
Attachments (2)
Change History (15)
by , 5 years ago
| Attachment: | uniqueconstraint_bug.zip added |
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comment:1 by , 5 years ago
| Component: | Uncategorized → Migrations |
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comment:2 by , 5 years ago
| Description: | modified (diff) |
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comment:3 by , 5 years ago
| Component: | Migrations → Database layer (models, ORM) |
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| Easy pickings: | set |
| Summary: | makemigrations doesn't check that UniqueConstraint field names exist → Add check for fields of UniqueConstraints. |
| Triage Stage: | Unreviewed → Accepted |
| Type: | Uncategorized → Cleanup/optimization |
Agreed. We can simply call cls._check_local_fields() for UniqueConstraint's fields. I attached tests.
comment:4 by , 5 years ago
| Owner: | changed from to |
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| Status: | new → assigned |
follow-up: 6 comment:5 by , 5 years ago
Hello Django Team,
My name is Jannah Mandwee, and I am working on my final project for my undergraduate software engineering class (here is the link to the assignment: https://web.eecs.umich.edu/~weimerw/481/hw6.html). I have to contribute to an open-source project and was advised to look through easy ticket pickings. I am wondering if it is possible to contribute to this ticket or if there is another ticket you believe would be a better fit for me. Thank you for your help.
comment:6 by , 5 years ago
Replying to Jannah Mandwee:
Hello Django Team,
My name is Jannah Mandwee, and I am working on my final project for my undergraduate software engineering class (here is the link to the assignment: https://web.eecs.umich.edu/~weimerw/481/hw6.html). I have to contribute to an open-source project and was advised to look through easy ticket pickings. I am wondering if it is possible to contribute to this ticket or if there is another ticket you believe would be a better fit for me. Thank you for your help.
Hi Jannah, I'm working in this ticket. You can consult this report: https://code.djangoproject.com/query?status=!closed&easy=1&stage=Accepted&order=priority there are all the tickets marked as easy.
comment:7 by , 5 years ago
| Cc: | added |
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comment:9 by , 5 years ago
| Summary: | Add check for fields of UniqueConstraints. → Add check for fields of UniqueConstraints and CheckConstraint. |
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comment:10 by , 5 years ago
| Has patch: | set |
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| Owner: | changed from to |
comment:11 by , 5 years ago
| Patch needs improvement: | set |
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| Summary: | Add check for fields of UniqueConstraints and CheckConstraint. → Add check for fields of UniqueConstraints. |
| Version: | 3.0 → master |
Replying to Ian Foote:
CheckConstraintmight have the same bug.
After reconsideration I think we should limit this check only to UniqueConstraint's, it's not worth to add complex and error prone logic for CheckConstraint's, we can fail of custom expressions etc.
comment:12 by , 5 years ago
| Patch needs improvement: | unset |
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CheckConstraint checks removed from patch.
Demonstration