#25002: Postgresql migration fails when changing a CharField to a TimeField -------------------------------------+------------------------------------- Reporter: dirkcuys | Owner: nobody Type: Bug | Status: new Component: Database layer | Version: 1.8 (models, ORM) | Severity: Normal | Resolution: Keywords: migrations | Triage Stage: | Unreviewed Has patch: 0 | Needs documentation: 0 Needs tests: 0 | Patch needs improvement: 0 Easy pickings: 0 | UI/UX: 0 -------------------------------------+------------------------------------- Description changed by dirkcuys:
Old description: > The code from the migration is as follows: > > {{{#!python > migrations.AlterField( > model_name='studygroup', > name='time', > field=models.TimeField(), > ), > }}} > > The field used to be a models.CharField() > > The error follows: > > {{{ > django.db.utils.ProgrammingError: column "time" cannot be cast > automatically to type time without time zone > HINT: Specify a USING expression to perform the conversion > }}} > > I can manually fix this using SQL: > > {{{ > ALTER TABLE "studygroups_studygroup" ALTER COLUMN "time" TYPE time USING > "time"::time; > }}} New description: The code from the migration is as follows: {{{#!python migrations.AlterField( model_name='studygroup', name='time', field=models.TimeField(), ), }}} The field used to be a models.CharField() The error follows: {{{ django.db.utils.ProgrammingError: column "time" cannot be cast automatically to type time without time zone HINT: Specify a USING expression to perform the conversion }}} I can manually fix this using SQL: {{{ ALTER TABLE "studygroups_studygroup" ALTER COLUMN "time" TYPE time USING "time"::time; }}} I don't have code with the problem isolated, but this project shows the problem when configured to use postgres. http://github.com/p2pu/knight- app/. -- -- Ticket URL: <https://code.djangoproject.com/ticket/25002#comment:2> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To post to this group, send email to django-updates@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/066.46d9d45a2dd183ef957c013bb3df98ab%40djangoproject.com. For more options, visit https://groups.google.com/d/optout.