Add order parameter to module

server/book/factories.py

@@ -24,6 +24,7 @@ class ModuleFactory(BasePageFactory):
     class Meta:
         model = Module
 
+    order = 0
     meta_title = factory.LazyAttribute(lambda x: fake.text(max_nb_chars=20))
     teaser = factory.LazyAttribute(lambda x: fake.sentence(nb_words=random.randint(8, 12)))
     description = factory.LazyAttribute(lambda x: fake.text(max_nb_chars=200))

server/book/migrations/0003_module_order.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.0.6 on 2018-08-08 13:38
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('book', '0002_topic_order'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='module',
+            name='order',
+            field=models.PositiveIntegerField(default=0, help_text='Order of the module'),
+            preserve_default=False,
+        ),
+    ]

server/book/models/module.py

@@ -17,6 +17,7 @@ class Module(Page):
         verbose_name = 'Modul'
         verbose_name_plural = 'Module'
 
+    order = models.PositiveIntegerField(null=False, blank=False, help_text='Order of the module')
     meta_title = models.CharField(
         max_length=255,
         help_text='e.g. \'Intro\' or \'Modul 1\''