allow blank slugs

src/economy/migrations/0009_auto_20190328_0715.py

@@ -0,0 +1,23 @@
+# Generated by Django 2.1.7 on 2019-03-28 06:15
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('economy', '0008_auto_20190327_1721'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='chain',
+            name='slug',
+            field=models.SlugField(blank=True, help_text='The url slug for this Chain. Leave blank to auto generate a slug.', unique=True),
+        ),
+        migrations.AlterField(
+            model_name='credebtor',
+            name='slug',
+            field=models.SlugField(blank=True, help_text='The url slug for this Credebtor. Leave blank to auto generate a slug.'),
+        ),
+    ]

src/economy/models.py

@@ -27,6 +27,7 @@ class Chain(CreatedUpdatedModel, UUIDModel):
 
     slug = models.SlugField(
         unique=True,
+        blank=True,
         help_text='The url slug for this Chain. Leave blank to auto generate a slug.'
     )
 
@@ -69,6 +70,7 @@ class Credebtor(CreatedUpdatedModel, UUIDModel):
     )
 
     slug = models.SlugField(
+        blank=True,
         help_text='The url slug for this Credebtor. Leave blank to auto generate a slug.'
     )