From d52cf17f156ec0c646a8bccfc069c6a149373c19 Mon Sep 17 00:00:00 2001
From: Samuel Colvin <s@muelcolvin.com>
Date: Mon, 8 May 2017 17:33:37 +0100
Subject: [PATCH] tweaking exception definitions

---
 pydantic/exceptions.py |  8 ++++++++
 pydantic/main.py       | 11 ++---------
 pydantic/validators.py |  2 +-
 3 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/pydantic/exceptions.py b/pydantic/exceptions.py
index eafb91e..ccf3f25 100644
--- a/pydantic/exceptions.py
+++ b/pydantic/exceptions.py
@@ -53,3 +53,11 @@ class ValidationError(ValueError):
 
 class ConfigError(RuntimeError):
     pass
+
+
+class Missing(ValueError):
+    pass
+
+
+class Extra(ValueError):
+    pass
diff --git a/pydantic/main.py b/pydantic/main.py
index 3ea0738..72d6862 100644
--- a/pydantic/main.py
+++ b/pydantic/main.py
@@ -1,7 +1,7 @@
 from collections import OrderedDict
 from types import FunctionType
 
-from .exceptions import Error, ValidationError
+from .exceptions import Error, Extra, Missing, ValidationError
 from .fields import Field
 from .validators import dict_validator
 
@@ -14,6 +14,7 @@ class BaseConfig:
     raise_exception = True
     validate_all = False
     ignore_extra = True
+    # TODO allow extra
 
 
 def inherit_config(self_config, parent_config) -> BaseConfig:
@@ -63,14 +64,6 @@ class MetaModel(type):
         return super().__new__(mcs, name, bases, namespace)
 
 
-class Missing(ValueError):
-    pass
-
-
-class Extra(ValueError):
-    pass
-
-
 MISSING = Missing('field required')
 MISSING_ERROR = Error(MISSING, None, None, None)
 EXTRA_ERROR = Error(Extra('extra fields not permitted'), None, None, None)
diff --git a/pydantic/validators.py b/pydantic/validators.py
index 64f7490..501fbe5 100644
--- a/pydantic/validators.py
+++ b/pydantic/validators.py
@@ -81,7 +81,7 @@ def enum_validator(v, field, **kwargs) -> Enum:
     return field.type_(v)
 
 
-# order is important here, for example: bool is a subclass of int, datetime is a subclass of date
+# order is important here, for example: bool is a subclass of int so has to come first, datetime before date same
 _VALIDATORS = [
     (str, [not_none_validator, str_validator, anystr_length_validator]),
     (bytes, [not_none_validator, bytes_validator, anystr_length_validator]),