Add through model to user school class connection, migrate all old

classes

server/users/migrations/0012_auto_20200303_1258.py

@@ -0,0 +1,29 @@
+# Generated by Django 2.1.15 on 2020-03-03 12:58
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0011_auto_20200302_1613'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='UserSchoolClassConnection',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('active', models.BooleanField(default=True)),
+                ('school_class', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='users.SchoolClass')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+        migrations.AddField(
+            model_name='schoolclass',
+            name='users_with_active',
+            field=models.ManyToManyField(blank=True, related_name='school_classes_with_active', through='users.UserSchoolClassConnection', to=settings.AUTH_USER_MODEL),
+        ),
+    ]

server/users/migrations/0013_auto_20200303_1259.py

@@ -0,0 +1,24 @@
+# Generated by Django 2.1.15 on 2020-03-03 12:59
+
+from django.db import migrations
+
+from users.models import UserSchoolClassConnection
+
+
+def forwards(apps, schema_editor):
+    SchoolClass = apps.get_model('users', 'SchoolClass')
+    UserSchoolClassConnection = apps.get_model('users', 'UserSchoolClassConnection')
+
+    for school_class in SchoolClass.objects.all():
+        for user in school_class.users.all():
+            UserSchoolClassConnection.objects.create(user=user, school_class=school_class, active=True)
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('users', '0012_auto_20200303_1258'),
+    ]
+
+    operations = [
+        migrations.RunPython(forwards)
+    ]

server/users/migrations/0014_remove_schoolclass_users.py

@@ -0,0 +1,17 @@
+# Generated by Django 2.1.15 on 2020-03-03 13:06
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0013_auto_20200303_1259'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='schoolclass',
+            name='users',
+        ),
+    ]

server/users/migrations/0015_auto_20200303_1306.py

@@ -0,0 +1,23 @@
+# Generated by Django 2.1.15 on 2020-03-03 13:06
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0014_remove_schoolclass_users'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='schoolclass',
+            name='users_with_active',
+        ),
+        migrations.AddField(
+            model_name='schoolclass',
+            name='users',
+            field=models.ManyToManyField(blank=True, related_name='school_classes', through='users.UserSchoolClassConnection', to=settings.AUTH_USER_MODEL),
+        ),
+    ]

server/users/models.py

@@ -11,6 +11,7 @@ from users.managers import RoleManager, UserRoleManager, UserManager
 DEFAULT_SCHOOL_ID = 1
 
 
+
 class User(AbstractUser):
     last_module = models.ForeignKey('books.Module', related_name='+', on_delete=models.SET_NULL, null=True)
     avatar_url = models.CharField(max_length=254, blank=True, default='')
@@ -69,7 +70,7 @@ class User(AbstractUser):
 class SchoolClass(models.Model):
     name = models.CharField(max_length=100, blank=False, null=False, unique=True)
     is_deleted = models.BooleanField(blank=False, null=False, default=False)
-    users = models.ManyToManyField(get_user_model(), related_name='school_classes', blank=True)
+    users = models.ManyToManyField(get_user_model(), related_name='school_classes', blank=True, through='users.UserSchoolClassConnection')
     code = models.CharField('Code zum Beitreten', blank=True, null=True, max_length=10, unique=True, default=None)
 
     class Meta:
@@ -175,3 +176,9 @@ class UserRole(models.Model):
 class UserSetting(models.Model):
     user = models.OneToOneField(get_user_model(), on_delete=models.CASCADE, related_name='user_setting')
     selected_class = models.ForeignKey(SchoolClass, blank=True, null=True, on_delete=models.CASCADE)
+
+
+class UserSchoolClassConnection(models.Model):
+    user = models.ForeignKey(User, on_delete=models.CASCADE)
+    school_class = models.ForeignKey(SchoolClass, on_delete=models.CASCADE)
+    active = models.BooleanField(default=True)