Use explicit mypy error codes in ignore comments and output

mypy.ini

@@ -12,8 +12,7 @@ warn_unreachable = true
 disallow_untyped_defs = true
 disallow_incomplete_defs = true
 disable_error_code = empty-body
-# TODO: update our test error messages to match new mypy output
-show_error_codes = false
+enable_error_code = ignore-without-code
 force_uppercase_builtins = true
 force_union_syntax = true
 
@@ -27,6 +26,7 @@ django_settings_module = scripts.drf_tests_settings
 # Suppress errors from site-packages due to https://github.com/typeddjango/pytest-mypy-plugins/issues/134
 [mypy-uritemplate.*]
 warn_unreachable = false
+disable_error_code = ignore-without-code
 
 [mypy-yaml.*]
 disallow_untyped_defs = false

pyproject.toml

@@ -40,7 +40,6 @@ ignore = ["PYI021", "PYI024", "PYI041", "PYI043"]
     "F405",
     "F822",
     "F821",
-    "PGH003",  # TODO fix these errors
 ]
 "rest_framework-stubs/compat.pyi" = ["PYI042"]
 

rest_framework-stubs/decorators.pyi

@@ -46,7 +46,7 @@ else:
 class MethodMapper(dict):
     def __init__(self, action: _View, methods: Sequence[str]) -> None: ...
     def _map(self, method: str, func: _View) -> _View: ...
-    def get(self, func: _View) -> _View: ...  # type: ignore
+    def get(self, func: _View) -> _View: ...  # type: ignore[explicit-override,override]
     def post(self, func: _View) -> _View: ...
     def put(self, func: _View) -> _View: ...
     def patch(self, func: _View) -> _View: ...

rest_framework-stubs/relations.pyi

@@ -57,7 +57,7 @@ class RelatedField(Generic[_MT, _DT, _PT], Field[_MT, _DT, _PT, Any]):
         style: dict[str, str] | None = ...,
     ) -> None: ...
     # mypy doesn't accept the typing below, although its accurate to what this class is doing, hence the ignore
-    def __new__(cls, *args: Any, **kwargs: Any) -> RelatedField[_MT, _DT, _PT] | ManyRelatedField: ...  # type: ignore
+    def __new__(cls, *args: Any, **kwargs: Any) -> RelatedField[_MT, _DT, _PT] | ManyRelatedField: ...  # type: ignore[misc]
     @classmethod
     def many_init(cls, *args: Any, **kwargs: Any) -> ManyRelatedField: ...
     def get_queryset(self) -> QuerySet[_MT]: ...

rest_framework-stubs/serializers.pyi

@@ -196,7 +196,7 @@ class ModelSerializer(Serializer, BaseSerializer[_MT]):
     instance: _MT | Sequence[_MT] | None
 
     class Meta:
-        model: type[_MT]  # type: ignore
+        model: type[_MT]  # type: ignore[valid-type]
         fields: Sequence[str] | Literal["__all__"]
         read_only_fields: Sequence[str] | None
         exclude: Sequence[str] | None

tests/typecheck/test_decorators.yml

@@ -16,18 +16,18 @@
         def view_func2(request: Request, arg: str) -> Response: ...
         reveal_type(view_func2)  # N: Revealed type is "rest_framework.views.AsView[def (django.http.request.HttpRequest, arg: builtins.str) -> rest_framework.response.Response]"
 
-        view_func2(None, 10)  # E: Argument 1 has incompatible type "None"; expected "HttpRequest"  # E: Argument 2 has incompatible type "int"; expected "str"
+        view_func2(None, 10)  # E: Argument 1 has incompatible type "None"; expected "HttpRequest"  [arg-type]  # E: Argument 2 has incompatible type "int"; expected "str"  [arg-type]
 -   case: api_view_bare_is_error
     main: |
         from typing import Any
         from rest_framework.decorators import api_view
-        @api_view  # E: Argument 1 to "api_view" has incompatible type "Callable[[Any], Any]"; expected "Optional[Sequence[str]]"
+        @api_view  # E: Argument 1 to "api_view" has incompatible type "Callable[[Any], Any]"; expected "Optional[Sequence[str]]"  [arg-type]
         def view_func2(request: Any) -> Any: ...
 -   case: api_view_incorrect_return
     main: |
         from rest_framework.decorators import api_view
         from rest_framework.request import Request
-        @api_view()  # E: Value of type variable "_RESP" of function cannot be "List[Any]"
+        @api_view()  # E: Value of type variable "_RESP" of function cannot be "List[Any]"  [type-var]
         def view_func2(request: Request) -> list: ...
 
 -   case: permission_classes

tests/typecheck/test_exceptions.yml

@@ -45,6 +45,6 @@
     APIException('I am just a message', code='msg')
     APIException()
     APIException(None, None)
-    APIException(1)  # E: Argument 1 to "APIException" has incompatible type "int"; expected "_APIExceptionInput"
-    APIException({'a': 1})  # E: Dict entry 0 has incompatible type "str": "int"; expected "str": "Union[_StrPromise, Sequence[_APIExceptionInput], Mapping[str, _APIExceptionInput], None]"
-    APIException({'a': ['test', 1]})  # E: List item 1 has incompatible type "int"; expected "Union[_StrPromise, Sequence[_APIExceptionInput], Mapping[str, _APIExceptionInput], None]"
+    APIException(1)  # E: Argument 1 to "APIException" has incompatible type "int"; expected "_APIExceptionInput"  [arg-type]
+    APIException({'a': 1})  # E: Dict entry 0 has incompatible type "str": "int"; expected "str": "Union[_StrPromise, Sequence[_APIExceptionInput], Mapping[str, _APIExceptionInput], None]"  [dict-item]
+    APIException({'a': ['test', 1]})  # E: List item 1 has incompatible type "int"; expected "Union[_StrPromise, Sequence[_APIExceptionInput], Mapping[str, _APIExceptionInput], None]"  [list-item]

tests/typecheck/test_fields.yml

@@ -1,11 +1,11 @@
 -   case: no_positional_args_fields
     main: |
         from rest_framework.fields import IntegerField, FloatField, UUIDField, CharField, DurationField
-        CharField(True)  # E: Too many positional arguments for "CharField"
-        IntegerField(1)  # E: Too many positional arguments for "IntegerField"
-        FloatField(1)  # E: Too many positional arguments for "FloatField"
-        UUIDField('hex_verbose')  # E: Too many positional arguments for "UUIDField"
-        DurationField(1)  # E: Too many positional arguments for "DurationField"
+        CharField(True)  # E: Too many positional arguments for "CharField"  [misc]
+        IntegerField(1)  # E: Too many positional arguments for "IntegerField"  [misc]
+        FloatField(1)  # E: Too many positional arguments for "FloatField"  [misc]
+        UUIDField('hex_verbose')  # E: Too many positional arguments for "UUIDField"  [misc]
+        DurationField(1)  # E: Too many positional arguments for "DurationField"  [misc]
 
 -   case: some_positional_args_fields
     main: |
@@ -14,48 +14,48 @@
         from rest_framework.fields import DecimalField, IPAddressField, SlugField, RegexField, ModelField, SerializerMethodField, ChoiceField, DateTimeField, DateField, TimeField
 
         DecimalField(1, 1, False, 1, 1, False, None)
-        DecimalField(1, 1, False, 1, 1, False, None, True)  # E: Too many positional arguments for "DecimalField"
+        DecimalField(1, 1, False, 1, 1, False, None, True)  # E: Too many positional arguments for "DecimalField"  [misc]
 
         IPAddressField('both')
-        IPAddressField('both', True)  # E: Too many positional arguments for "IPAddressField"
+        IPAddressField('both', True)  # E: Too many positional arguments for "IPAddressField"  [misc]
 
         SlugField(False)
-        SlugField(False, True)  # E: Too many positional arguments for "SlugField"
+        SlugField(False, True)  # E: Too many positional arguments for "SlugField"  [misc]
 
         RegexField('^$')
-        RegexField('^$', True)  # E: Too many positional arguments for "RegexField"
+        RegexField('^$', True)  # E: Too many positional arguments for "RegexField"  [misc]
 
         SerializerMethodField('bla')
-        SerializerMethodField('bla', True)  # E: Too many positional arguments for "SerializerMethodField"
+        SerializerMethodField('bla', True)  # E: Too many positional arguments for "SerializerMethodField"  [misc]
 
         mf: models.CharField = models.CharField()
         ModelField(mf)
-        ModelField(mf, True)  # E: Too many positional arguments for "ModelField"
+        ModelField(mf, True)  # E: Too many positional arguments for "ModelField"  [misc]
 
         ChoiceField([])
-        ChoiceField([], False)  # E: Too many positional arguments for "ChoiceField"
+        ChoiceField([], False)  # E: Too many positional arguments for "ChoiceField"  [misc]
 
         d: datetime = datetime.now()
         DateTimeField('', [], None, read_only=True, write_only=True, allow_null=True)
-        DateTimeField('', [], None, True)  # E: Too many positional arguments for "DateTimeField"
+        DateTimeField('', [], None, True)  # E: Too many positional arguments for "DateTimeField"  [misc]
 
         DateField('', [], read_only=True, write_only=True, allow_null=True)
-        DateField('', [], True)  # E: Too many positional arguments for "DateField"
+        DateField('', [], True)  # E: Too many positional arguments for "DateField"  [misc]
 
         TimeField('', [], read_only=True, write_only=True, allow_null=True)
-        TimeField('', [], True)  # E: Too many positional arguments for "TimeField"
+        TimeField('', [], True)  # E: Too many positional arguments for "TimeField"  [misc]
 
 -   case: default_and_inital_args_fields
     main: |
         from rest_framework.fields import DictField, CharField, empty
         from typing import Optional, Dict, Any
 
         CharField(initial='', default=lambda: '')
-        CharField(initial=None, default=4)  # E: Argument "default" to "CharField" has incompatible type "int"; expected "Union[Union[str, _StrPromise], Callable[[], Union[str, _StrPromise]], None, _Empty]"
-        CharField(initial={}, default=empty)  # E: Argument "initial" to "CharField" has incompatible type "Dict[Never, Never]"; expected "Union[str, Callable[[], str], None, _Empty]"
+        CharField(initial=None, default=4)  # E: Argument "default" to "CharField" has incompatible type "int"; expected "Union[Union[str, _StrPromise], Callable[[], Union[str, _StrPromise]], None, _Empty]"  [arg-type]
+        CharField(initial={}, default=empty)  # E: Argument "initial" to "CharField" has incompatible type "Dict[Never, Never]"; expected "Union[str, Callable[[], str], None, _Empty]"  [arg-type]
 
         x: Optional[str] = CharField().get_initial()
-        y: Optional[int] = CharField().get_initial()  # E: Incompatible types in assignment (expression has type "Optional[str]", variable has type "Optional[int]")
+        y: Optional[int] = CharField().get_initial()  # E: Incompatible types in assignment (expression has type "Optional[str]", variable has type "Optional[int]")  [assignment]
 
 -   case: float_field_args_fields
     main: |
@@ -76,7 +76,7 @@
         ChoiceField(['test'], allow_null=True, default=None)
         ChoiceField([1], default=int_callback)
         ChoiceField([1, 'lulz'], default=mixed_callback)
-        ChoiceField([1], default=lambda: None)   # E: Argument "default" to "ChoiceField" has incompatible type "Callable[[], None]"; expected "Union[Union[str, _StrPromise], int, Callable[[], Union[Union[str, _StrPromise], int]], None, _Empty]" # E: Incompatible return value type (got "None", expected "Union[Union[str, _StrPromise], int]")
+        ChoiceField([1], default=lambda: None)   # E: Argument "default" to "ChoiceField" has incompatible type "Callable[[], None]"; expected "Union[Union[str, _StrPromise], int, Callable[[], Union[Union[str, _StrPromise], int]], None, _Empty]"  [arg-type]  # E: Incompatible return value type (got "None", expected "Union[Union[str, _StrPromise], int]")  [return-value]
 
 -   case: MultipleChoiceField_default
     main: |
@@ -90,13 +90,13 @@
         MultipleChoiceField(choices=['test'], allow_null=True, default=None)
         MultipleChoiceField(choices=[1], default=int_set_callback)
         MultipleChoiceField(choices=[1, 'lulz'], default=mixed_set_callback)
-        MultipleChoiceField(choices=[1], default=lambda: [1])   # E: Argument "default" to "MultipleChoiceField" has incompatible type "Callable[[], List[int]]"; expected "Union[Set[Union[str, int]], Set[str], Set[int], Callable[[], Union[Set[Union[str, int]], Set[str], Set[int]]], None, _Empty]" # E: Incompatible return value type (got "List[int]", expected "Union[Set[Union[str, int]], Set[str], Set[int]]")
+        MultipleChoiceField(choices=[1], default=lambda: [1])   # E: Argument "default" to "MultipleChoiceField" has incompatible type "Callable[[], List[int]]"; expected "Union[Set[Union[str, int]], Set[str], Set[int], Callable[[], Union[Set[Union[str, int]], Set[str], Set[int]]], None, _Empty]"  [arg-type]  # E: Incompatible return value type (got "List[int]", expected "Union[Set[Union[str, int]], Set[str], Set[int]]")  [return-value]
 
         MultipleChoiceField(choices=[(1, "1"), (2, "2")], default={1})
-        MultipleChoiceField(choices=[(1, "1"), (2, "2")], default=[1])  # E: Argument "default" to "MultipleChoiceField" has incompatible type "List[int]"; expected "Union[Set[Union[str, int]], Set[str], Set[int], Callable[[], Union[Set[Union[str, int]], Set[str], Set[int]]], None, _Empty]"
+        MultipleChoiceField(choices=[(1, "1"), (2, "2")], default=[1])  # E: Argument "default" to "MultipleChoiceField" has incompatible type "List[int]"; expected "Union[Set[Union[str, int]], Set[str], Set[int], Callable[[], Union[Set[Union[str, int]], Set[str], Set[int]]], None, _Empty]"  [arg-type]
 
         MultipleChoiceField(choices=[(1, "1"), (2, "2")], initial={1})
-        MultipleChoiceField(choices=[(1, "1"), (2, "2")], initial=[1])  # E: Argument "initial" to "MultipleChoiceField" has incompatible type "List[int]"; expected "Union[Set[Union[Union[str, _StrPromise], int]], Set[Union[str, _StrPromise]], Set[int], Callable[[], Union[Set[Union[Union[str, _StrPromise], int]], Set[Union[str, _StrPromise]], Set[int]]], None, _Empty]"
+        MultipleChoiceField(choices=[(1, "1"), (2, "2")], initial=[1])  # E: Argument "initial" to "MultipleChoiceField" has incompatible type "List[int]"; expected "Union[Set[Union[Union[str, _StrPromise], int]], Set[Union[str, _StrPromise]], Set[int], Callable[[], Union[Set[Union[Union[str, _StrPromise], int]], Set[Union[str, _StrPromise]], Set[int]]], None, _Empty]"  [arg-type]
 
 -   case: FileField_default
     main: |
@@ -108,12 +108,12 @@
         FileField(allow_null=True, default=None)
         FileField(allow_null=True, default=file_callback)
         FileField(allow_null=True, default=file_callback())
-        FileField(allow_null=True, default=123) # E: Argument "default" to "FileField" has incompatible type "int"; expected "Union[File[Any], Callable[[], File[Any]], None, _Empty]"
+        FileField(allow_null=True, default=123) # E: Argument "default" to "FileField" has incompatible type "int"; expected "Union[File[Any], Callable[[], File[Any]], None, _Empty]"  [arg-type]
 
         ImageField(allow_null=True, default=None)
         ImageField(default=file_callback)
         ImageField(default=file_callback())
-        ImageField(default='a') # E: Argument "default" to "ImageField" has incompatible type "str"; expected "Union[File[Any], Callable[[], File[Any]], None, _Empty]"
+        ImageField(default='a') # E: Argument "default" to "ImageField" has incompatible type "str"; expected "Union[File[Any], Callable[[], File[Any]], None, _Empty]"  [arg-type]
 
 -   case: DictField_default
     main: |
@@ -123,13 +123,13 @@
         DictField(default={})
         DictField(default={'a': 1, 'b': 2})
         DictField(default=lambda: {'a': [], 'b': 'str'})
-        DictField(default=[])  # E: Argument "default" to "DictField" has incompatible type "List[Never]"; expected "Union[Dict[Any, Any], Callable[[], Dict[Any, Any]], None, _Empty]"
+        DictField(default=[])  # E: Argument "default" to "DictField" has incompatible type "List[Never]"; expected "Union[Dict[Any, Any], Callable[[], Dict[Any, Any]], None, _Empty]"  [arg-type]
 
         JSONField(allow_null=True, default=None)
         JSONField(default={})
         JSONField(default={'a': 1, 'b': 2})
         JSONField(default=lambda: {'a': [], 'b': 'str'})
-        JSONField(default=[])  # E: Argument "default" to "JSONField" has incompatible type "List[Never]"; expected "Union[Mapping[Any, Any], Callable[[], Mapping[Any, Any]], None, _Empty]"
+        JSONField(default=[])  # E: Argument "default" to "JSONField" has incompatible type "List[Never]"; expected "Union[Mapping[Any, Any], Callable[[], Mapping[Any, Any]], None, _Empty]"  [arg-type]
 
 -   case: ListField_default
     main: |
@@ -139,4 +139,4 @@
         ListField(default=[])
         ListField(default=[0, 'one'])
         ListField(default=lambda: [])
-        ListField(default='wät')  # E: Argument "default" to "ListField" has incompatible type "str"; expected "Union[List[Any], Callable[[], List[Any]], None, _Empty]"
+        ListField(default='wät')  # E: Argument "default" to "ListField" has incompatible type "str"; expected "Union[List[Any], Callable[[], List[Any]], None, _Empty]"  [arg-type]

tests/typecheck/test_serializers.yml

@@ -104,9 +104,9 @@
 - case: test_return_list_serializer_argument_is_kw_only
   parametrized:
     - arg: ""
-      err: No overload variant of "ReturnList" matches argument type "TestSerializer"
+      err: No overload variant of "ReturnList" matches argument type "TestSerializer"  [call-overload]
     - arg: "[],"
-      err: No overload variant of "ReturnList" matches argument types "List[Never]", "TestSerializer"
+      err: No overload variant of "ReturnList" matches argument types "List[Never]", "TestSerializer"  [call-overload]
   main: |
     from rest_framework import serializers
     from rest_framework.utils.serializer_helpers import ReturnList
@@ -123,9 +123,9 @@
 - case: test_return_list_serializer_is_required
   parametrized:
     - arg: ""
-      err: All overload variants of "ReturnList" require at least one argument
+      err: All overload variants of "ReturnList" require at least one argument  [call-overload]
     - arg: "[]"
-      err: No overload variant of "ReturnList" matches argument type "List[Never]"
+      err: No overload variant of "ReturnList" matches argument type "List[Never]"  [call-overload]
   main: |
     from rest_framework import serializers
     from rest_framework.utils.serializer_helpers import ReturnList
@@ -174,13 +174,13 @@
 - case: test_return_dict_serializer_argument_is_kw_only
   parametrized:
     - arg: ""
-      err: No overload variant of "ReturnDict" matches argument type "TestSerializer"
+      err: No overload variant of "ReturnDict" matches argument type "TestSerializer"  [call-overload]
     - arg: "{},"
-      err: No overload variant of "ReturnDict" matches argument types "Dict[Never, Never]", "TestSerializer"
+      err: No overload variant of "ReturnDict" matches argument types "Dict[Never, Never]", "TestSerializer"  [call-overload]
     - arg: "[],"
-      err: No overload variant of "ReturnDict" matches argument types "List[Never]", "TestSerializer"
+      err: No overload variant of "ReturnDict" matches argument types "List[Never]", "TestSerializer"  [call-overload]
     - arg: "[('a', 'a')],"
-      err: No overload variant of "ReturnDict" matches argument types "List[Tuple[str, str]]", "TestSerializer"
+      err: No overload variant of "ReturnDict" matches argument types "List[Tuple[str, str]]", "TestSerializer"  [call-overload]
   main: |
     from rest_framework import serializers
     from rest_framework.utils.serializer_helpers import ReturnDict
@@ -203,13 +203,13 @@
 - case: test_return_dict_serializer_is_required
   parametrized:
     - arg: ""
-      err: All overload variants of "ReturnDict" require at least one argument
+      err: All overload variants of "ReturnDict" require at least one argument  [call-overload]
     - arg: "{}"
-      err: No overload variant of "ReturnDict" matches argument type "Dict[Never, Never]"
+      err: No overload variant of "ReturnDict" matches argument type "Dict[Never, Never]"  [call-overload]
     - arg: "[]"
-      err: No overload variant of "ReturnDict" matches argument type "List[Never]"
+      err: No overload variant of "ReturnDict" matches argument type "List[Never]"  [call-overload]
     - arg: "[('a', 'a')]"
-      err: No overload variant of "ReturnDict" matches argument type "List[Tuple[str, str]]"
+      err: No overload variant of "ReturnDict" matches argument type "List[Tuple[str, str]]"  [call-overload]
   main: |
     from rest_framework import serializers
     from rest_framework.utils.serializer_helpers import ReturnDict