Started port to Django 2.1, Python 3, Docker

This commit is a rough port to Django 2.1, Python 3 and a Docker based local
development setup. Tests fail/error but migrations and the web frontend are
already runnable. Task queue functionality is untested and translations seem to
have trouble.

gnuviechadmin/userdbs/forms.py

@@ -5,7 +5,7 @@ This module defines form classes for user database editing.
 from __future__ import absolute_import, unicode_literals
 
 from django import forms
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
 
 from crispy_forms.helper import FormHelper

gnuviechadmin/userdbs/migrations/0001_initial.py

@@ -1,13 +1,12 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
-from django.db import models, migrations
 import django.utils.timezone
 import model_utils.fields
+from django.db import migrations, models
 
 
 class Migration(migrations.Migration):
-
     dependencies = [
         ('osusers', '0004_auto_20150104_1751'),
     ]
@@ -16,12 +15,22 @@ class Migration(migrations.Migration):
         migrations.CreateModel(
             name='DatabaseUser',
             fields=[
-                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('created', model_utils.fields.AutoCreatedField(default=django.utils.timezone.now, verbose_name='created', editable=False)),
-                ('modified', model_utils.fields.AutoLastModifiedField(default=django.utils.timezone.now, verbose_name='modified', editable=False)),
-                ('name', models.CharField(max_length=63, verbose_name='username')),
-                ('db_type', models.PositiveSmallIntegerField(verbose_name='database type', choices=[(0, 'PostgreSQL'), (1, 'MySQL')])),
-                ('osuser', models.ForeignKey(to='osusers.User')),
+                ('id', models.AutoField(
+                    verbose_name='ID', serialize=False, auto_created=True,
+                    primary_key=True)),
+                ('created', model_utils.fields.AutoCreatedField(
+                    default=django.utils.timezone.now, verbose_name='created',
+                    editable=False)),
+                ('modified', model_utils.fields.AutoLastModifiedField(
+                    default=django.utils.timezone.now, verbose_name='modified',
+                    editable=False)),
+                ('name', models.CharField(
+                    max_length=63, verbose_name='username')),
+                ('db_type', models.PositiveSmallIntegerField(
+                    verbose_name='database type',
+                    choices=[(0, 'PostgreSQL'), (1, 'MySQL')])),
+                ('osuser', models.ForeignKey(
+                    to='osusers.User', on_delete=models.CASCADE)),
             ],
             options={
                 'verbose_name': 'database user',
@@ -32,11 +41,20 @@ class Migration(migrations.Migration):
         migrations.CreateModel(
             name='UserDatabase',
             fields=[
-                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('created', model_utils.fields.AutoCreatedField(default=django.utils.timezone.now, verbose_name='created', editable=False)),
-                ('modified', model_utils.fields.AutoLastModifiedField(default=django.utils.timezone.now, verbose_name='modified', editable=False)),
-                ('db_name', models.CharField(max_length=63, verbose_name='database name')),
-                ('db_user', models.ForeignKey(verbose_name='database user', to='userdbs.DatabaseUser')),
+                ('id', models.AutoField(
+                    verbose_name='ID', serialize=False, auto_created=True,
+                    primary_key=True)),
+                ('created', model_utils.fields.AutoCreatedField(
+                    default=django.utils.timezone.now, verbose_name='created',
+                    editable=False)),
+                ('modified', model_utils.fields.AutoLastModifiedField(
+                    default=django.utils.timezone.now, verbose_name='modified',
+                    editable=False)),
+                ('db_name', models.CharField(
+                    max_length=63, verbose_name='database name')),
+                ('db_user', models.ForeignKey(
+                    verbose_name='database user', to='userdbs.DatabaseUser',
+                    on_delete=models.CASCADE)),
             ],
             options={
                 'verbose_name': 'user database',
@@ -46,10 +64,10 @@ class Migration(migrations.Migration):
         ),
         migrations.AlterUniqueTogether(
             name='userdatabase',
-            unique_together=set([('db_name', 'db_user')]),
+            unique_together={('db_name', 'db_user')},
         ),
         migrations.AlterUniqueTogether(
             name='databaseuser',
-            unique_together=set([('name', 'db_type')]),
+            unique_together={('name', 'db_type')},
         ),
     ]

gnuviechadmin/userdbs/models.py

@@ -83,7 +83,7 @@ class DatabaseUserManager(models.Manager):
 
 @python_2_unicode_compatible
 class DatabaseUser(TimeStampedModel, models.Model):
-    osuser = models.ForeignKey(OsUser)
+    osuser = models.ForeignKey(OsUser, on_delete=models.CASCADE)
     name = models.CharField(
         _('username'), max_length=63)
     db_type = models.PositiveSmallIntegerField(
@@ -203,7 +203,9 @@ class UserDatabase(TimeStampedModel, models.Model):
     # MySQL limits to 64, PostgreSQL to 63 characters
     db_name = models.CharField(
         _('database name'), max_length=63)
-    db_user = models.ForeignKey(DatabaseUser, verbose_name=_('database user'))
+    db_user = models.ForeignKey(
+        DatabaseUser, verbose_name=_('database user'),
+        on_delete=models.CASCADE)
 
     objects = UserDatabaseManager()