feat(attribute): add slug validation for Python identifier compliance

Implement custom validation for Attribute model's slug field to ensure it's a valid Python identifier. Add corresponding test case.

eav/models/attribute.py

@@ -291,6 +291,26 @@ class Attribute(models.Model):
                 _('You can only assign a choice group to multiple choice attributes'),
             )
 
+    def clean_fields(self, exclude=None):
+        """Perform field-specific validation on the model's fields.
+
+        This method extends the default field cleaning process to include
+        custom validation for the slug field.
+
+        Args:
+            exclude (list): Fields to exclude from cleaning.
+
+        Raises:
+            ValidationError: If the slug is not a valid Python identifier.
+        """
+        super().clean_fields(exclude=exclude)
+
+        if not self.slug.isidentifier():
+            raise ValidationError({
+                'slug': _("Slug must be a valid Python identifier (no spaces, "
+                            "special characters, or leading digits).")
+            })
+
     def get_choices(self):
         """
         Returns a query set of :class:`EnumValue` objects for this attribute.

tests/test_attributes.py

@@ -1,12 +1,13 @@
-import uuid
 import string
+import uuid
 
+import pytest
+from django.conf import settings as django_settings
 from django.core.exceptions import ValidationError
 from django.test import TestCase
 from hypothesis import given, settings
-from hypothesis.extra import django
-from django.conf import settings as django_settings
 from hypothesis import strategies as st
+from hypothesis.extra import django
 from hypothesis.strategies import just
 
 import eav
@@ -15,7 +16,6 @@ from eav.models import Attribute, Value
 from eav.registry import EavConfig
 from test_project.models import Doctor, Encounter, Patient, RegisterTestModel
 
-
 if django_settings.EAV2_PRIMARY_KEY_FIELD == "django.db.models.UUIDField":
     auto_field_strategy = st.builds(uuid.uuid4, version=4, max_length=32)
 elif django_settings.EAV2_PRIMARY_KEY_FIELD == "django.db.models.CharField":
@@ -162,3 +162,13 @@ class TestAttributeModel(django.TestCase):
         )
 
         assert isinstance(instance, Attribute)
+
+
+@pytest.mark.django_db
+def test_attribute_create_with_invalid_slug():
+    with pytest.raises(ValidationError):
+        Attribute.objects.create(
+            name="Test Attribute",
+            slug="123-invalid",
+            datatype=Attribute.TYPE_TEXT
+        )