Comments on: Django multiple database support with DB switch feature http://www.meszaros.cz/2009/10/django-multiple-database-support-with-db-switch-feature/ reflections on technology and society Sat, 10 Dec 2011 05:42:38 +0000 hourly 1 http://wordpress.org/?v=3.1.1 By: admin http://www.meszaros.cz/2009/10/django-multiple-database-support-with-db-switch-feature/comment-page-1/#comment-763 admin Thu, 17 Mar 2011 17:49:23 +0000 http://www.meszaros.cz/?p=51#comment-763 See official docs at http://docs.djangoproject.com/en/dev/ref/models/fields/#foreignkey See official docs at http://docs.djangoproject.com/en/dev/ref/models/fields/#foreignkey

]]> By: prague girl http://www.meszaros.cz/2009/10/django-multiple-database-support-with-db-switch-feature/comment-page-1/#comment-762 prague girl Thu, 17 Mar 2011 17:34:22 +0000 http://www.meszaros.cz/?p=51#comment-762 Is there more documentation on Foreign Key somewhere? I'm not finding it. Jana Is there more documentation on Foreign Key somewhere? I’m not finding it.

Jana

]]> By: admin http://www.meszaros.cz/2009/10/django-multiple-database-support-with-db-switch-feature/comment-page-1/#comment-21 admin Fri, 27 Nov 2009 09:36:58 +0000 http://www.meszaros.cz/?p=51#comment-21 Yes, I am able to do that. The first condition is not to use foreign key constraints in the first table with foreign key on database level. This is apparent for MySQL MyISAM engine. If you use any other engine or any other DB backend, Django will implicitly try to create foreign key constraint. In that case, it is better to create the table manually with the foreign key column of simple integer type without any constraints. The other table, living in another database, must be defined as regular django model, which inherits from your custom overriden "django.db.models.Model" class. The overriden class must be using a custom "Manager", which i simply overriden "django.db.models.Manager" class. If you want to perform SELECT or UPDATE commands on another database tables, you have to override the "get_query_set" method in your custom manager. If you also want do perform INSERT commands, you have to override the "_insert" method too. For detailed how-to, please follow this link: http://djangrrl.com/view/multiple-database-connection-a-simple-use-case/ Yes, I am able to do that. The first condition is not to use foreign key constraints in the first table with foreign key on database level. This is apparent for MySQL MyISAM engine. If you use any other engine or any other DB backend, Django will implicitly try to create foreign key constraint. In that case, it is better to create the table manually with the foreign key column of simple integer type without any constraints. The other table, living in another database, must be defined as regular django model, which inherits from your custom overriden “django.db.models.Model” class. The overriden class must be using a custom “Manager”, which i simply overriden “django.db.models.Manager” class.
If you want to perform SELECT or UPDATE commands on another database tables, you have to override the “get_query_set” method in your custom manager. If you also want do perform INSERT commands, you have to override the “_insert” method too.
For detailed how-to, please follow this link: http://djangrrl.com/view/multiple-database-connection-a-simple-use-case/

]]> By: Malik Ehsanullah http://www.meszaros.cz/2009/10/django-multiple-database-support-with-db-switch-feature/comment-page-1/#comment-20 Malik Ehsanullah Thu, 26 Nov 2009 11:17:08 +0000 http://www.meszaros.cz/?p=51#comment-20 Are you able to access Foreign Key in a table which points to some other table which is present in some other database. Are you able to access Foreign Key in a table which points to some other table which is present in some other database.

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