422 - Code Search

tests/test_request_params/test_body/test_list.py

)
def test_required_list_str_missing(path: str, json: dict | None):
    client = TestClient(app)
    response = client.post(path, json=json)
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "type": "missing",
                "loc": IsOneOf(["body", "p"], ["body"]),
                "msg": "Field required",

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github.com/tiangolo/fastapi

docs_src/custom_request_and_route/tutorial002_py310.py

            except RequestValidationError as exc:
                body = await request.body()
                detail = {"errors": exc.errors(), "body": body.decode()}
                raise HTTPException(status_code=422, detail=detail)

        return custom_route_handler


app = FastAPI()
app.router.route_class = ValidationErrorLoggingRoute


@app.post("/")
async def sum_numbers(numbers: list[int] = Body()):

Created: Sun Apr 05 07:19:11 GMT 2026

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github.com/tiangolo/fastapi

tests/test_starlette_exception.py

                                "description": "Successful Response",
                                "content": {"application/json": {"schema": {}}},
                            },
                            "422": {
                                "description": "Validation Error",
                                "content": {
                                    "application/json": {
                                        "schema": {

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github.com/tiangolo/fastapi

tests/test_param_include_in_schema.py

                                "description": "Successful Response",
                                "content": {"application/json": {"schema": {}}},
                            },
                            "422": {
                                "description": "Validation Error",
                                "content": {
                                    "application/json": {
                                        "schema": {

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github.com/tiangolo/fastapi

tests/test_infer_param_optionality.py

                                "description": "Successful Response",
                                "content": {"application/json": {"schema": {}}},
                            },
                            "422": {
                                "description": "Validation Error",
                                "content": {
                                    "application/json": {
                                        "schema": {

Created: Sun Apr 05 07:19:11 GMT 2026

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github.com/tiangolo/fastapi

docs_src/custom_request_and_route/tutorial002_an_py310.py

            except RequestValidationError as exc:
                body = await request.body()
                detail = {"errors": exc.errors(), "body": body.decode()}
                raise HTTPException(status_code=422, detail=detail)

        return custom_route_handler


app = FastAPI()
app.router.route_class = ValidationErrorLoggingRoute


@app.post("/")
async def sum_numbers(numbers: Annotated[list[int], Body()]):

Created: Sun Apr 05 07:19:11 GMT 2026

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github.com/tiangolo/fastapi

tests/test_openapi_examples.py

                                "description": "Successful Response",
                                "content": {"application/json": {"schema": {}}},
                            },
                            "422": {
                                "description": "Validation Error",
                                "content": {
                                    "application/json": {
                                        "schema": {

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github.com/tiangolo/fastapi

tests/test_security_oauth2.py

    assert response.headers["WWW-Authenticate"] == "Bearer"


def test_strict_login_no_data():
    response = client.post("/login")
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "type": "missing",
                "loc": ["body", "grant_type"],
                "msg": "Field required",
                "input": None,

Created: Sun Apr 05 07:19:11 GMT 2026

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github.com/tiangolo/fastapi

tests/test_security_oauth2_optional_description.py

    assert response.json() == {"msg": "Create an account first"}


def test_strict_login_None():
    response = client.post("/login", data=None)
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "type": "missing",
                "loc": ["body", "grant_type"],
                "msg": "Field required",
                "input": None,

Created: Sun Apr 05 07:19:11 GMT 2026

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github.com/tiangolo/fastapi

tests/test_multi_body_errors.py

                }
            ]
        }
    )


def test_jsonable_encoder_requiring_error():
    response = client.post("/items/", json=[{"name": "Foo", "age": -1.0}])
    assert response.status_code == 422, response.text
    assert response.json() == {
        "detail": [
            {
                "type": "greater_than",
                "loc": ["body", 0, "age"],
                "msg": "Input should be greater than 0",

Created: Sun Apr 05 07:19:11 GMT 2026

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