Bases: ValidationRule
Validates that a string value is a well-formed email address.
Example
validator = EmailValidator("email_address")
errors = validator.validate("user@example.com")
assert errors == []
errors = validator.validate("not-an-email")
assert len(errors) == 1
Source code in src/forging_blocks/domain/validators/email_validator.py
| class EmailValidator(ValidationRule):
"""Validates that a string value is a well-formed email address.
Example:
```python
validator = EmailValidator("email_address")
errors = validator.validate("user@example.com")
assert errors == []
errors = validator.validate("not-an-email")
assert len(errors) == 1
```
"""
_EMAIL_PATTERN: re.Pattern[str] = re.compile(
r"^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}"
r"[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*\.[a-zA-Z]{2,}$"
)
def __init__(self, field: str) -> None:
self._field = field
def validate(self, value: Any) -> list[RuleViolationError]:
if value is None or not isinstance(value, str) or not self._EMAIL_PATTERN.match(value):
return [
RuleViolatedError(
ErrorMessage(f"'{self._field}' must be a valid email address."),
ErrorMetadata(context={"field": self._field, "code": "invalid_email"}),
)
]
return []
|