Update Patch constraint to handel empty and null case

Signed-off-by: ziad hany <ziadhany2016@gmail.com>

Author: ziadhany

vulnerabilities/migrations/0104_packagecommitpatch_patch_and_more.py

@@ -1,4 +1,4 @@
-# Generated by Django 4.2.25 on 2025-12-11 11:10
+# Generated by Django 4.2.25 on 2025-12-11 12:23
 
 from django.db import migrations, models
 
@@ -101,7 +101,10 @@ class Migration(migrations.Migration):
             model_name="patch",
             constraint=models.CheckConstraint(
                 check=models.Q(
-                    ("patch_url__isnull", False), ("patch_text__isnull", False), _connector="OR"
+                    models.Q(
+                        ("patch_url__isnull", False), ("patch_text__isnull", False), _connector="OR"
+                    ),
+                    models.Q(("patch_url", ""), ("patch_text", ""), _negated=True),
                 ),
                 name="patch_url_or_patch_text",
             ),

vulnerabilities/models.py

@@ -2782,7 +2782,8 @@ class Meta:
         unique_together = ["patch_checksum", "patch_url"]
         constraints = [
             models.CheckConstraint(
-                check=(Q(patch_url__isnull=False) | Q(patch_text__isnull=False)),
+                check=(Q(patch_url__isnull=False) | Q(patch_text__isnull=False))
+                & ~(Q(patch_url="") & Q(patch_text="")),
                 name="patch_url_or_patch_text",
             )
         ]