Fix description field clash with base class

CHANGES/+description-field-clash.removal

@@ -0,0 +1 @@
+Removed `description` field from models subclassing `Distribution` to fix field clash error when using pulpcore>=3.106.

pulp_container/app/migrations/0048_migrate_description_to_parent.py

@@ -0,0 +1,36 @@
+# Generated manually to migrate description fields from subclasses to parent Distribution class
+
+from django.db import migrations
+
+
+def migrate_description_data_forward(apps, schema_editor):
+    Distribution = apps.get_model("core", "Distribution")
+    ContainerDistribution = apps.get_model("container", "ContainerDistribution")
+    ContainerPullThroughDistribution = apps.get_model(
+        "container", "ContainerPullThroughDistribution"
+    )
+
+    for Model in (ContainerDistribution, ContainerPullThroughDistribution):
+        for dist in Model.objects.all():
+            if dist.description:
+                parent = Distribution.objects.get(pk=dist.pk)
+                if not parent.description:
+                    parent.description = dist.description
+                    parent.save(update_fields=["description"])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        # Ensure parent field exists before copying data
+        ("core", "0146_distribution_description"),
+        ("container", "0047_containernamespace_pulp_labels"),
+    ]
+
+    operations = [
+        # Copy description data from subclass tables to parent Distribution table
+        migrations.RunPython(migrate_description_data_forward, migrations.RunPython.noop),
+        # Remove duplicate fields from subclasses
+        migrations.RemoveField(model_name="containerdistribution", name="description"),
+        migrations.RemoveField(model_name="containerpullthroughdistribution", name="description"),
+    ]

pulp_container/app/models.py

@@ -834,7 +834,6 @@ class ContainerPullThroughDistribution(Distribution, AutoAddObjPermsMixin):
             "Defaults to unrestricted pull access."
         ),
     )
-    description = models.TextField(null=True)
 
     class Meta:
         default_related_name = "%(app_label)s_%(model_name)s"
@@ -878,7 +877,6 @@ class ContainerDistribution(Distribution, AutoAddObjPermsMixin):
             "Defaults to unrestricted pull access."
         ),
     )
-    description = models.TextField(null=True)
 
     pull_through_distribution = models.ForeignKey(
         ContainerPullThroughDistribution,

pulp_container/app/serializers.py

@@ -421,9 +421,6 @@ class ContainerDistributionSerializer(DistributionSerializer, GetOrCreateSeriali
         view_name="pulp_container/namespaces-detail",
         help_text=_("Namespace this distribution belongs to."),
     )
-    description = serializers.CharField(
-        help_text=_("An optional description."), required=False, allow_null=True
-    )
     repository_version = RepositoryVersionRelatedField(
         required=False, help_text=_("RepositoryVersion to be served"), allow_null=True
     )
@@ -487,7 +484,6 @@ class Meta:
             "remote",
             "namespace",
             "private",
-            "description",
         )
 
 
@@ -521,9 +517,6 @@ class ContainerPullThroughDistributionSerializer(DistributionSerializer):
         queryset=models.ContainerDistribution.objects.all(),
         required=False,
     )
-    description = serializers.CharField(
-        help_text=_("An optional description."), required=False, allow_null=True
-    )
 
     def validate(self, data):
         validated_data = super().validate(data)
@@ -549,7 +542,6 @@ class Meta:
             "distributions",
             "namespace",
             "private",
-            "description",
         )