422 - Code Search

tests/test_openapi_separate_input_output_schemas.py

                                        }
                                    }
                                },
                            },
                            "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

tests/test_sub_callbacks.py

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

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

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github.com/tiangolo/fastapi

tests/test_request_params/test_body/test_optional_list.py

    assert response.json() == {"p": None}


def test_model_optional_list_str_missing():
    client = TestClient(app)
    response = client.post("/model-optional-list-str")
    assert response.status_code == 422, response.text
    assert response.json() == {
        "detail": [
            {
                "input": None,
                "loc": ["body"],
                "msg": "Field required",

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

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github.com/tiangolo/fastapi

tests/test_regex_deprecated_params.py


@needs_py310
def test_query_params_str_validations_item_query_nonregexquery():
    client = get_client()
    response = client.get("/items/", params={"q": "nonregexquery"})
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "type": "string_pattern_mismatch",
                "loc": ["query", "q"],

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

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github.com/tiangolo/fastapi

tests/test_strict_content_type_nested.py

client_nested = TestClient(app_nested)


def test_strict_inner_on_lax_app_rejects_no_content_type():
    response = client_nested.post("/outer/strict/items/", content='{"key": "value"}')
    assert response.status_code == 422


def test_default_inner_inherits_lax_from_app():
    response = client_nested.post("/outer/default/items/", content='{"key": "value"}')
    assert response.status_code == 200
    assert response.json() == {"key": "value"}

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

- Last Modified: Mon Feb 23 17:45:20 GMT 2026

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github.com/tiangolo/fastapi

tests/test_forms_single_model.py

        data={
            "username": "Rick",
            "lastname": "Sanchez",
            "age": "seventy",
            "tags": ["plumbus", "citadel"],
        },
    )
    assert response.status_code == 422, response.text
    assert response.json() == {
        "detail": [
            {
                "type": "int_parsing",
                "loc": ["body", "age"],

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

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github.com/tiangolo/fastapi

tests/test_request_params/test_cookie/test_required_str.py

@pytest.mark.parametrize(
    "path",
    ["/required-str", "/model-required-str"],
)
def test_required_str_missing(path: str):
    client = TestClient(app)
    response = client.get(path)
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "type": "missing",
                "loc": ["cookie", "p"],
                "msg": "Field required",

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

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github.com/tiangolo/fastapi

tests/test_extra_routes.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

- Last Modified: Tue Feb 17 09:59:14 GMT 2026

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github.com/tiangolo/fastapi

tests/test_request_params/test_file/test_required.py

    [
        "/required-bytes",
        "/required-uploadfile",
    ],
)
def test_required_missing(path: str):
    client = TestClient(app)
    response = client.post(path)
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "type": "missing",
                "loc": ["body", "p"],
                "msg": "Field required",
                "input": None,

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

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github.com/tiangolo/fastapi

tests/test_request_params/test_form/test_list.py

    "path",
    ["/required-list-str", "/model-required-list-str"],
)
def test_required_list_str_missing(path: str):
    client = TestClient(app)
    response = client.post(path)
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "type": "missing",
                "loc": ["body", "p"],
                "msg": "Field required",

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

- Last Modified: Sat Dec 27 18:31:34 GMT 2025

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