Enhancement: unique mail rule names by owner

src/documents/tests/test_migration_workflows.py

@@ -5,9 +5,7 @@ from documents.tests.utils import TestMigrations
 class TestMigrateWorkflow(TestMigrations):
     migrate_from = "1043_alter_savedviewfilterrule_rule_type"
     migrate_to = "1044_workflow_workflowaction_workflowtrigger_and_more"
-    dependencies = (
-        ("paperless_mail", "0023_remove_mailrule_filter_attachment_filename_and_more"),
-    )
+    dependencies = (("paperless_mail", "0024_alter_mailrule_name_and_more"),)
 
     def setUpBeforeMigration(self, apps):
         User = apps.get_model("auth", "User")

src/paperless_mail/migrations/0024_alter_mailrule_name_and_more.py

@@ -0,0 +1,33 @@
+# Generated by Django 4.2.11 on 2024-06-05 16:51
+
+from django.db import migrations
+from django.db import models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("paperless_mail", "0023_remove_mailrule_filter_attachment_filename_and_more"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="mailrule",
+            name="name",
+            field=models.CharField(max_length=256, verbose_name="name"),
+        ),
+        migrations.AddConstraint(
+            model_name="mailrule",
+            constraint=models.UniqueConstraint(
+                fields=("name", "owner"),
+                name="paperless_mail_mailrule_unique_name_owner",
+            ),
+        ),
+        migrations.AddConstraint(
+            model_name="mailrule",
+            constraint=models.UniqueConstraint(
+                condition=models.Q(("owner__isnull", True)),
+                fields=("name",),
+                name="paperless_mail_mailrule_name_unique",
+            ),
+        ),
+    ]

src/paperless_mail/models.py

@@ -59,6 +59,17 @@ class MailRule(document_models.ModelWithOwner):
     class Meta:
         verbose_name = _("mail rule")
         verbose_name_plural = _("mail rules")
+        constraints = [
+            models.UniqueConstraint(
+                fields=["name", "owner"],
+                name="%(app_label)s_%(class)s_unique_name_owner",
+            ),
+            models.UniqueConstraint(
+                name="%(app_label)s_%(class)s_name_unique",
+                fields=["name"],
+                condition=models.Q(owner__isnull=True),
+            ),
+        ]
 
     class ConsumptionScope(models.IntegerChoices):
         ATTACHMENTS_ONLY = 1, _("Only process attachments.")
@@ -93,7 +104,7 @@ class MailRule(document_models.ModelWithOwner):
         FROM_NAME = 3, _("Use name (or mail address if not available)")
         FROM_CUSTOM = 4, _("Use correspondent selected below")
 
-    name = models.CharField(_("name"), max_length=256, unique=True)
+    name = models.CharField(_("name"), max_length=256)
 
     order = models.IntegerField(_("order"), default=0)