Add need pattern reference to need and in admin

commoning/admin.py

 from django.contrib import admin
 
-# Register your models here.
+from commoning.models import Need
+
+admin.site.register(Need)

commoning/migrations/0002_auto_20200614_1520.py

+# Generated by Django 2.2.13 on 2020-06-14 15:20
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('commoning', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='need',
+            name='need_pattern_url',
+            field=models.URLField(blank=True),
+        ),
+        migrations.AlterField(
+            model_name='need',
+            name='title',
+            field=models.CharField(max_length=200),
+        ),
+    ]

commoning/models.py

@@ -2,6 +2,10 @@ from django.db import models
 
 
 class Need(models.Model):
-    title = models.CharField(max_length=255)
+    title = models.CharField(max_length=200)
     description = models.TextField()
     creation_time = models.DateTimeField(auto_now_add=True)
+    need_pattern_url = models.URLField(blank=True)
+
+    def __str__(self):
+        return self.title