#16752: Multi-db without a 'default' database -------------------------------------+------------------------------------- Reporter: Jeremy Dunck | Owner: nobody Type: Bug | Status: new Component: Database layer | Version: 1.3 (models, ORM) | Severity: Normal | Resolution: Keywords: | Triage Stage: Accepted Has patch: 0 | Needs documentation: 0 Needs tests: 0 | Patch needs improvement: 0 Easy pickings: 0 | UI/UX: 0 -------------------------------------+------------------------------------- Description changed by Anton Samarchyan:
Old description: > In the [https://docs.djangoproject.com/en/dev/topics/db/multi-db multi-db > doc] it says: > {{{ > If you don’t have a default database, you need to be careful to always > specify the database that you want to use. > }}} > > I have a project where that is exactly the behavior I'd prefer - I want > to explicitly route every call and have nothing go to the 'default' > database. > > However, when I removed the 'default' key from DATABASES (and hard-coded > a router to always return a different value), model validation failed. > This seems to be because it imports > {{{ > from django.db import connection > }}} > then proceeds to validation the schema against that connection (which is, > in fact, the non-existant 'default'). This fails as soon as an operation > is called on the connection. > > There is a second problem with this -- all model validation occurs > against the default connection rather than the connection that the model > will be routed to. That seems like a bug, but I'd like to treat it > separately. > > My intention with this ticket is to establish: do we intend projects to > work without a 'default' project, as implied by the docs, or is a > 'default' database always assumed? New description: In the [https://docs.djangoproject.com/en/dev/topics/db/multi-db multi-db doc] it says: {{{ If you don’t have a default database, you need to be careful to always specify the database that you want to use. }}} I have a project where that is exactly the behavior I'd prefer - I want to explicitly route every call and have nothing go to the 'default' database. However, when I removed the 'default' key from DATABASES (and hard-coded a router to always return a different value), model validation failed. This seems to be because it imports {{{ from django.db import connection }}} then proceeds to validation the schema against that connection (which is, in fact, the nonexistent 'default'). This fails as soon as an operation is called on the connection. There is a second problem with this -- all model validation occurs against the default connection rather than the connection that the model will be routed to. That seems like a bug, but I'd like to treat it separately. My intention with this ticket is to establish: do we intend projects to work without a 'default' project, as implied by the docs, or is a 'default' database always assumed? -- -- Ticket URL: <https://code.djangoproject.com/ticket/16752#comment:4> 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/064.7a4e9a152c171e7bfe08db70daf16cac%40djangoproject.com. For more options, visit https://groups.google.com/d/optout.