check email toxic domain at model-level

antispam/forms.py

@@ -2,7 +2,7 @@ from django import forms
 from django.core.validators import EmailValidator
 from django.utils.translation import gettext_lazy as _
 
-from antispam.models import ToxicDomain
+from antispam.models.models import ToxicDomain
 
 
 class AntiSpamEmailValidator(EmailValidator):
@@ -17,6 +17,6 @@ validate_antispam_email = AntiSpamEmailValidator()
 
 
 class AntiSpamEmailField(forms.EmailField):
-    """An email field that email addresses with a known toxic domain."""
+    """An email field that forbids email addresses with a known toxic domain."""
 
     default_validators = [validate_antispam_email]

antispam/models/__init__.py

@@ -0,0 +1,4 @@
+from antispam.models.fields import AntiSpamEmailField
+from antispam.models.models import ToxicDomain
+
+__all__ = ["AntiSpamEmailField", "ToxicDomain"]

antispam/models/fields.py

@@ -0,0 +1,21 @@
+from django.conf import settings
+from django.db import models
+
+from antispam import forms
+
+
+class AntiSpamEmailField(models.EmailField):
+    """An email field that forbids email addresses with a known toxic domain."""
+
+    default_validators = [forms.validate_antispam_email]
+
+
+if settings.TESTING:
+    from model_bakery import baker
+
+    baker.generators.add(
+        AntiSpamEmailField, lambda: baker.random_gen.gen_email(max_length=100)
+    )
+else:  # pragma: no cover
+    # baker is only used in tests, so we don't need coverage for this part
+    pass