allow blank/null Robotpkg.homepage

rainboard/migrations/0016_blank_robotpkg_homepage.py

+# Generated by Django 2.0.5 on 2018-06-19 09:01
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('rainboard', '0015_debug'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='robotpkg',
+            name='homepage',
+            field=models.URLField(blank=True, null=True),
+        ),
+    ]

rainboard/models.py

@@ -534,7 +534,7 @@ class Robotpkg(NamedModel):
     master_repository = models.CharField(max_length=200, default='')
     maintainer = models.CharField(max_length=200, default='')
     comment = models.TextField()
-    homepage = models.URLField(max_length=200, default='')
+    homepage = models.URLField(max_length=200, blank=True, null=True)
 
     license = models.ForeignKey(License, on_delete=models.SET_NULL, blank=True, null=True)
     public = models.BooleanField(default=True)