Linting (but real)

src/registrar/management/commands/lint.py

@@ -22,6 +22,10 @@ class Command(BaseCommand):
     # and, in all cases, make sure to use a list (not a string) for flags/args
     # as this will quote the output.
     linters = {
+        "mypy": {
+            "purpose": "Type checking",
+            "args": ["mypy", "."],
+        },
         "flake8": {
             "purpose": "Linting",
             "args": ["flake8", ".", "--count", "--show-source", "--statistics"],
@@ -30,10 +34,6 @@ class Command(BaseCommand):
             "purpose": "Formatting",
             "args": ["black", "--check", "."],
         },
-        "mypy": {
-            "purpose": "Type checking",
-            "args": ["mypy", "."],
-        },
         "bandit": {
             "purpose": "Security scanning",
             "args": ["bandit", "-r", "."],

src/registrar/models/utility/domain_helper.py

@@ -27,13 +27,11 @@ class DomainHelper:
         return bool(cls.DOMAIN_REGEX.match(domain))
 
     @classmethod
-    def validate(cls, domain: str | None, blank_ok=False) -> str:
+    def validate(cls, domain: str, blank_ok=False) -> str:
         """Attempt to determine if a domain name could be requested."""
 
         # Split into pieces for the linter
-        cleaned_domain = cls._validate_domain_string(domain, blank_ok)
+        domain = cls._validate_domain_string(domain, blank_ok)
-        if cleaned_domain is not None:
-            domain = cleaned_domain
 
         try:
             if not check_domain_available(domain):