Add basic activities

commoning/admin.py

 from django.contrib import admin
 
-from commoning.models import Need
+from commoning.models import Activity, Need
 
+admin.site.register(Activity)
 admin.site.register(Need)

commoning/migrations/0003_activity.py

+# Generated by Django 2.2.13 on 2020-06-14 17:12
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('commoning', '0002_auto_20200614_1520'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Activity',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('creation_time', models.DateTimeField(auto_now_add=True)),
+                ('activity_pattern_url', models.URLField()),
+                ('need', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, to='commoning.Need')),
+            ],
+        ),
+    ]

commoning/models.py

 from django.db import models
 
 
+class Activity(models.Model):
+    creation_time = models.DateTimeField(auto_now_add=True)
+    activity_pattern_url = models.URLField()
+    need = models.OneToOneField('commoning.Need', on_delete=models.CASCADE)
+
+
 class Need(models.Model):
     title = models.CharField(max_length=200)
     description = models.TextField()