{* ../../docs_src/body/tutorial002_py310.py *}

## Request body + path parameters { #request-body-path-parameters }

You can declare path parameters and request body at the same time.

**FastAPI** will recognize that the function parameters that match path parameters should be **taken from the path**, and that function parameters that are declared to be Pydantic models should be **taken from the request body**.

    }


@pytest.mark.parametrize(
    "path",
    [
        "/optional-bytes",
        "/optional-uploadfile",
    ],
)
def test_optional_missing(path: str):
    client = TestClient(app)
    response = client.post(path)
    assert response.status_code == 200, response.text
    assert response.json() == {"file_size": None}


@pytest.mark.parametrize(
    "path",
    [
        "/optional-bytes",

    client = TestClient(app)
    response = client.post(path, data={"p": "hello"})
    assert response.status_code == 200
    assert response.json() == {"p": None}


@pytest.mark.parametrize(
    "path",
    ["/optional-alias", "/model-optional-alias"],
)
def test_optional_alias_by_alias(path: str):
    client = TestClient(app)
    response = client.post(path, data={"p_alias": "hello"})

async def read_model_required_str(p: Annotated[FormModelRequiredStr, Form()]):
    return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    ["/required-str", "/model-required-str"],
)
def test_required_str_schema(path: str):
    openapi = app.openapi()
    body_model_name = get_body_model_name(openapi, path)

    assert app.openapi()["components"]["schemas"][body_model_name] == {
        "properties": {

# Body - Multiple Parameters { #body-multiple-parameters }

Now that we have seen how to use `Path` and `Query`, let's see more advanced uses of request body declarations.

## Mix `Path`, `Query` and body parameters { #mix-path-query-and-body-parameters }

First, of course, you can mix `Path`, `Query` and request body parameter declarations freely and **FastAPI** will know what to do.

    return {"file_size": [file.size for file in p]}


@pytest.mark.parametrize(
    "path",
    [
        "/list-bytes",
        "/list-uploadfile",
    ],
)
def test_list_schema(path: str):
    openapi = app.openapi()
    body_model_name = get_body_model_name(openapi, path)

    assert app.openapi()["components"]["schemas"][body_model_name] == {
        "properties": {
            "p": {

    /**
     * Creates a new SMB1 delete directory request.
     *
     * @param config the CIFS configuration
     * @param path the path of the directory to delete
     */
    public SmbComDeleteDirectory(final Configuration config, final String path) {
        super(config, SMB_COM_DELETE_DIRECTORY, path);
    }

    @Override
    protected int writeParameterWordsWireFormat(final byte[] dst, final int dstIndex) {
        return 0;

  )
  fun method(): String = method

  @JvmName("-deprecated_path")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "path"),
    level = DeprecationLevel.ERROR,
  )
  fun path(): String = path

  @JvmName("-deprecated_headers")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "headers"),
    level = DeprecationLevel.ERROR,
  )

You can define Header parameters the same way you define `Query`, `Path` and `Cookie` parameters.

## Import `Header` { #import-header }

First import `Header`:

{* ../../docs_src/header_params/tutorial001_an_py310.py hl[3] *}

## Declare `Header` parameters { #declare-header-parameters }

Then declare the header parameters using the same structure as with `Path`, `Query` and `Cookie`.

/**
 */
@Deprecated
class DefaultModelBuilderFactoryTest {

    private static final String BASE_DIR =
            Paths.get("src", "test", "resources", "poms", "factory").toString();

    private File getPom(String name) {
        return new File(Paths.get(BASE_DIR, name + ".xml").toString()).getAbsoluteFile();
    }

    @Test
    void testCompleteWiring() throws Exception {