feat: add FieldValidationError

CHANGELOG.rst

@@ -12,7 +12,7 @@ Changelog
 ------
 Added
 ^^^^^
-- Add field to ValidationError. (#1460)
+- Add `FieldValidationError` to raise error when field validation error. (#1460)
 
 0.20.0
 ------

tortoise/exceptions.py

@@ -1,4 +1,7 @@
-from typing import Optional
+import typing
+
+if typing.TYPE_CHECKING:
+    from tortoise.fields import Field
 
 
 class BaseORMException(Exception):
@@ -79,15 +82,21 @@ class ValidationError(BaseORMException):
     The ValidationError is raised when validators of field validate failed.
     """
 
-    def __init__(self, msg: str, field: Optional[str] = None):
-        self.field = field
-        self.msg = msg
-
-    def __str__(self):
-        return self.msg
-
 
 class UnSupportedError(BaseORMException):
     """
     The UnSupportedError is raised when operation is not supported.
     """
+
+
+class FieldValidationError(ValidationError):
+    """
+    The FieldValidationError is raised when validators of field validate failed.
+    """
+
+    def __init__(self, field: Field, msg: str):
+        self.field = field
+        self.msg = msg
+
+    def __str__(self):
+        return self.msg

tortoise/fields/base.py

@@ -16,7 +16,7 @@
 
 from pypika.terms import Term
 
-from tortoise.exceptions import ConfigurationError, ValidationError
+from tortoise.exceptions import ConfigurationError, ValidationError, FieldValidationError
 from tortoise.validators import Validator
 
 if TYPE_CHECKING:  # pragma: nocoverage
@@ -259,7 +259,7 @@ def validate(self, value: Any):
                 else:
                     v(value)
             except ValidationError as exc:
-                raise ValidationError(f"{self.model_field_name}: {exc}", self.model_field_name)
+                raise FieldValidationError(self, f"{self.model_field_name}: {exc}") from exc
 
     @property
     def required(self) -> bool: