AAP-32143 Make the JT name uniqueness enforced at the database level (#15956) (#6958)

* Make the JT name uniqueness enforced at the database level

* Forgot demo project fixture

* New approach, done by adding a new field

* Update for linters and failures

* Fix logical error in migration test

* Revert some test changes based on review comment

* Do not rename first template, add test

* Avoid name-too-long rename errors

* Insert migration into place

* Move existing files with git

* Bump migrations of existing

* Update migration test

* Awkward bump

* Fix migration file link

* update test reference again

awx/main/migrations/0200_template_name_constraint.py

@@ -0,0 +1,50 @@
+# Generated by Django 4.2.20 on 2025-04-22 15:54
+
+import logging
+
+from django.db import migrations, models
+
+from awx.main.migrations._db_constraints import _rename_duplicates
+
+
+logger = logging.getLogger(__name__)
+
+
+def rename_jts(apps, schema_editor):
+    cls = apps.get_model('main', 'JobTemplate')
+    _rename_duplicates(cls)
+
+
+def rename_projects(apps, schema_editor):
+    cls = apps.get_model('main', 'Project')
+    _rename_duplicates(cls)
+
+
+def change_inventory_source_org_unique(apps, schema_editor):
+    cls = apps.get_model('main', 'InventorySource')
+    r = cls.objects.update(org_unique=False)
+    logger.info(f'Set database constraint rule for {r} inventory source objects')
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0199_inventorygroupvariableswithhistory_and_more'),
+    ]
+
+    operations = [
+        migrations.RunPython(rename_jts, migrations.RunPython.noop),
+        migrations.RunPython(rename_projects, migrations.RunPython.noop),
+        migrations.AddField(
+            model_name='unifiedjobtemplate',
+            name='org_unique',
+            field=models.BooleanField(blank=True, default=True, editable=False, help_text='Used internally to selectively enforce database constraint on name'),
+        ),
+        migrations.RunPython(change_inventory_source_org_unique, migrations.RunPython.noop),
+        migrations.AddConstraint(
+            model_name='unifiedjobtemplate',
+            constraint=models.UniqueConstraint(
+                condition=models.Q(('org_unique', True)), fields=('polymorphic_ctype', 'name', 'organization'), name='ujt_hard_name_constraint'
+            ),
+        ),
+    ]

awx/main/migrations/_db_constraints.py

@@ -0,0 +1,25 @@
+import logging
+
+from django.db.models import Count
+
+
+logger = logging.getLogger(__name__)
+
+
+def _rename_duplicates(cls):
+    field = cls._meta.get_field('name')
+    max_len = field.max_length
+    for organization_id in cls.objects.order_by().values_list('organization_id', flat=True).distinct():
+        duplicate_data = cls.objects.values('name').filter(organization_id=organization_id).annotate(count=Count('name')).order_by().filter(count__gt=1)
+        for data in duplicate_data:
+            name = data['name']
+            for idx, ujt in enumerate(cls.objects.filter(name=name, organization_id=organization_id).order_by('created')):
+                if idx > 0:
+                    suffix = f'_dup{idx}'
+                    max_chars = max_len - len(suffix)
+                    if len(ujt.name) >= max_chars:
+                        ujt.name = ujt.name[:max_chars] + suffix
+                    else:
+                        ujt.name = ujt.name + suffix
+                    logger.info(f'Renaming duplicate {cls._meta.model_name} to `{ujt.name}` because of duplicate name entry')
+                    ujt.save(update_fields=['name'])