ignore invalid for pydantic v1

docs_src/query_params/tutorial007_py310.py

@@ -1,4 +1,4 @@
-from typing import Annotated, Dict, List, Union
+from typing import Annotated, Dict, List
 
 from fastapi import FastAPI, Query
 
@@ -8,15 +8,13 @@ app = FastAPI()
 @app.get("/query/mixed-type-params")
 def get_mixed_mapping_mixed_type_query_params(
     query: Annotated[int, Query()] = None,
-    mapping_query_str_or_int: Annotated[
+    mapping_query_str: Annotated[Dict[str, str], Query()] = None,
-        Union[Dict[str, str], Dict[str, int]], Query()
-    ] = None,
     mapping_query_int: Annotated[Dict[str, int], Query()] = None,
     sequence_mapping_int: Annotated[Dict[str, List[int]], Query()] = None,
 ):
     return {
         "query": query,
-        "mapping_query_str_or_int": mapping_query_str_or_int,
+        "mapping_query_str": mapping_query_str,
         "mapping_query_int": mapping_query_int,
         "sequence_mapping_int": sequence_mapping_int,
     }

fastapi/_compat/shared.py

@@ -148,6 +148,8 @@ def field_annotation_is_scalar_mapping(
     annotation: Union[Type[Any], None],
 ) -> bool:
     origin = get_origin(annotation)
+    if origin is Annotated:
+        return field_annotation_is_scalar_mapping(get_args(annotation)[0])
     if origin is Union or origin is UnionType:
         at_least_one_scalar_mapping = False
         for arg in get_args(annotation):
@@ -167,6 +169,8 @@ def field_annotation_is_scalar_sequence_mapping(
     annotation: Union[Type[Any], None],
 ) -> bool:
     origin = get_origin(annotation)
+    if origin is Annotated:
+        return field_annotation_is_scalar_sequence_mapping(get_args(annotation)[0])
     if origin is Union or origin is UnionType:
         at_least_one_scalar_mapping = False
         for arg in get_args(annotation):

fastapi/_compat/v1.py

@@ -1,4 +1,4 @@
-from copy import copy
+from copy import copy, deepcopy
 from dataclasses import dataclass, is_dataclass
 from enum import Enum
 from typing import (
@@ -350,6 +350,54 @@ def get_model_fields(model: Type[BaseModel]) -> List[ModelField]:
     return list(model.__fields__.values())  # type: ignore[attr-defined]
 
 
-def omit_by_default(field_info: FieldInfo) -> FieldInfo:
+def ignore_invalid(cls, v, values, field, **kwargs) -> Any:
+    from .may_v1 import _regenerate_error_with_loc
+
+    field_copy = deepcopy(field)
+    field_copy.pre_validators = [
+        validator
+        for validator in field_copy.pre_validators
+        if getattr(validator, "__name__", "") != "ignore_invalid"
+    ]
+    v, errors = field_copy.validate(v, values, loc=field.name)
+    if not errors:
+        return v
+
+    # pop the keys or elements that caused the validation errors and revalidate
+    for error in _regenerate_error_with_loc(errors=errors, loc_prefix=()):
+        loc = error["loc"][1:]
+        if len(loc) == 0:
+            continue
+        if isinstance(loc[0], int) and isinstance(v, list):
+            index = loc[0]
+            if 0 <= index < len(v):
+                v[index] = None
+
+        # Handle nested list validation errors (e.g., dict[str, list[str]])
+        elif isinstance(loc[0], str) and isinstance(v, dict):
+            key = loc[0]
+            if (
+                len(loc) > 1
+                and isinstance(loc[1], int)
+                and key in v
+                and isinstance(v[key], list)
+            ):
+                list_index = loc[1]
+                v[key][list_index] = None
+            elif key in v:
+                v.pop(key)
+
+    if isinstance(v, list):
+        v = [el for el in v if el is not None]
+
+    if isinstance(v, dict):
+        for key in v.keys():
+            if isinstance(v[key], list):
+                v[key] = [el for el in v[key] if el is not None]
+
+    return v
+
+
+def omit_by_default(field_info: FieldInfo) -> tuple[FieldInfo, dict]:
     """add a wrap validator to omit invalid values by default."""
-    raise NotImplementedError("This function is a placeholder in Pydantic v1.")
+    return field_info, {"ignore_invalid": Validator(ignore_invalid, pre=True)}

fastapi/_compat/v2.py

@@ -507,13 +507,12 @@ if shared.PYDANTIC_VERSION_MINOR_TUPLE >= (2, 6):
         else:
             return OnErrorOmit[annotation]
 
-    def omit_by_default(field_info: FieldInfo) -> FieldInfo:
+    def omit_by_default(field_info: FieldInfo) -> tuple[FieldInfo, dict]:
-        """Set omit by default on a FieldInfo's annotation."""
         new_annotation = _omit_by_default(field_info.annotation)
         new_field_info = copy_field_info(
             field_info=field_info, annotation=new_annotation
         )
-        return new_field_info
+        return new_field_info, {}
 
 else:
 
@@ -555,9 +554,9 @@ else:
 
             return handler(v)
 
-    def omit_by_default(field_info: FieldInfo) -> FieldInfo:
+    def omit_by_default(field_info: FieldInfo) -> tuple[FieldInfo, dict]:
         """add a wrap validator to omit invalid values by default."""
         field_info.metadata = field_info.metadata or [] + [
             WrapValidator(ignore_invalid)
         ]
-        return field_info
+        return field_info, {}

fastapi/dependencies/utils.py

@@ -506,11 +506,12 @@ def analyze_param(
         field_info.alias = alias
 
         # Omit by default for scalar mapping and scalar sequence mapping query fields
-        if isinstance(field_info, (params.Query)) and (
+        class_validators: dict[str, list[Any]] = {}
-            field_annotation_is_scalar_sequence_mapping(field_info.annotation)
+        if isinstance(field_info, (params.Query, temp_pydantic_v1_params.Query)) and (
-            or field_annotation_is_scalar_mapping(field_info.annotation)
+            field_annotation_is_scalar_sequence_mapping(use_annotation_from_field_info)
+            or field_annotation_is_scalar_mapping(use_annotation_from_field_info)
         ):
-            field_info = omit_by_default(field_info)
+            field_info, class_validators = omit_by_default(field_info)
 
         field = create_model_field(
             name=param_name,
@@ -520,6 +521,7 @@ def analyze_param(
             required=field_info.default
             in (RequiredParam, may_v1.RequiredParam, Undefined),
             field_info=field_info,
+            class_validators=class_validators,
         )
         if is_path_param:
             assert is_scalar_field(field=field), (
@@ -529,8 +531,8 @@ def analyze_param(
             assert (
                 is_scalar_field(field)
                 or is_scalar_sequence_field(field)
-                or is_scalar_sequence_mapping_field(field)
                 or is_scalar_mapping_field(field)
+                or is_scalar_sequence_mapping_field(field)
                 or (
                     _is_model_class(field.type_)
                     # For Pydantic v1

tests/test_application.py

@@ -1219,14 +1219,7 @@ def test_openapi_schema():
                             "schema": {
                                 "additionalProperties": {
                                     "items": {
-                                        "anyOf": [
+                                        "type": "integer",
-                                            {
-                                                "type": "string",
-                                            },
-                                            {
-                                                "type": "integer",
-                                            },
-                                        ],
                                     },
                                     "type": "array",
                                 },

tests/test_tutorial/test_query_params/test_tutorial007_py310.py

@@ -1,10 +1,6 @@
 import pytest
-from fastapi._compat import PYDANTIC_V2
 from fastapi.testclient import TestClient
 
-if not PYDANTIC_V2:
-    pytest.skip("This test is only for Pydantic v2", allow_module_level=True)
-
 
 @pytest.fixture(name="client")
 def get_client():
@@ -19,7 +15,7 @@ def test_foo_needy_very(client: TestClient):
     assert response.status_code == 200
     assert response.json() == {
         "query": 2,
-        "mapping_query_str_or_int": {"foo": "baz"},
+        "mapping_query_str": {"foo": "baz"},
         "mapping_query_int": {},
         "sequence_mapping_int": {"foo": []},
     }
@@ -30,7 +26,7 @@ def test_just_string_not_scalar_mapping(client: TestClient):
     assert response.status_code == 200
     assert response.json() == {
         "query": 2,
-        "mapping_query_str_or_int": {"bar": "3", "foo": "baz"},
+        "mapping_query_str": {"bar": "3", "foo": "baz"},
         "mapping_query_int": {"bar": 3},
         "sequence_mapping_int": {"bar": [3], "foo": [1, 2]},
     }