Add uniqueness setting and optionally connect signal

dbtemplates/apps.py

@@ -1,4 +1,6 @@
 from django.apps import AppConfig
+from django.conf import settings
+from django.db.models.signals import m2m_changed
 from django.utils.translation import gettext_lazy as _
 
 
@@ -7,3 +9,10 @@ class DBTemplatesConfig(AppConfig):
     verbose_name = _('Database templates')
 
     default_auto_field = 'django.db.models.AutoField'
+
+    def ready(self):
+        from .models import Template
+        from .signal_handlers import verify_template_name_uniqueness_across_all_selected_sites
+
+        if getattr(settings, 'DBTEMPLATES_UNIQUE', False):
+            m2m_changed.connect(verify_template_name_uniqueness_across_all_selected_sites, sender=Template.sites.through)

dbtemplates/conf.py

@@ -16,6 +16,7 @@ class DbTemplatesConf(AppConf):
     AUTO_POPULATE_CONTENT = True
     MEDIA_PREFIX = None
     CACHE_BACKEND = None
+    UNIQUE = False
 
     def configure_media_prefix(self, value):
         if value is None:

dbtemplates/migrations/0003_template_template_name_idx.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.1 on 2025-05-26 19:59
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('dbtemplates', '0002_alter_template_creation_date_and_more'),
+        ('sites', '0002_alter_domain_unique'),
+    ]
+
+    operations = [
+        migrations.AddIndex(
+            model_name='template',
+            index=models.Index(fields=['name'], name='template_name_idx'),
+        ),
+    ]

dbtemplates/models.py

@@ -36,6 +36,9 @@ class AbstractTemplateMixin(models.Model):
         verbose_name = _('template')
         verbose_name_plural = _('templates')
         ordering = ('name',)
+        indexes = [
+            models.Index(fields=["name"], name="template_name_idx"),
+        ]
 
     def __str__(self):
         return self.name