Modify the definition of short

- was a CharField but that limited short urls to be just characters
- now a SlugField which better accomidates urls with numbers,hypens, etc.
- included migration since I think that's what you do(?)

go/go/migrations/0003_auto_20160107_1418.py

+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('go', '0002_auto_20140911_1336'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='url',
+            name='short',
+            field=models.SlugField(max_length=20, serialize=False, primary_key=True),
+        ),
+    ]

go/go/models.py

@@ -21,7 +21,7 @@ class URL(models.Model):
     date_created = models.DateTimeField(default=timezone.now)
 
     target = models.URLField(max_length=1000)
-    short = models.CharField(primary_key=True, max_length=20)
+    short = models.SlugField(primary_key=True, max_length=20)
     clicks = models.IntegerField(default=0)
 
     qrclicks = models.IntegerField(default=0)