///

```mermaid
graph TB

query_extractor(["query_extractor"])
query_or_cookie_extractor(["query_or_cookie_extractor"])

read_query["/items/"]

query_extractor --> query_or_cookie_extractor --> read_query
```

## Using the same dependency multiple times { #using-the-same-dependency-multiple-times }

{* ../../docs_src/pydantic_v1_in_v2/tutorial003_an_py310.py hl[2:3,6,12,21:22] *}

Im obigen Beispiel ist das Eingabemodell ein Pydantic‑v1‑Modell, und das Ausgabemodell (definiert in `response_model=ItemV2`) ist ein Pydantic‑v2‑Modell.

### Pydantic v1 Parameter { #pydantic-v1-parameters }

Jedes mit `yield` zurückgegebene Element wird als JSON kodiert und im Feld `data:` eines SSE-Events gesendet.

Wenn Sie den Rückgabetyp als `AsyncIterable[Item]` deklarieren, verwendet FastAPI ihn, um die Daten mit Pydantic zu **validieren**, zu **dokumentieren** und zu **serialisieren**.

{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[1:25] hl[10:12,23] *}

/// tip | Tipp

            json.append("[");
            boolean first = true;
            for (final Object item : (Collection<?>) value) {
                if (!first) {
                    json.append(", ");
                }
                first = false;
                appendJsonValue(json, item);
            }
            json.append("]");
        } else if (value instanceof Map) {
            json.append("{");

                        <ol class="breadcrumb float-sm-right">
                            <li class="breadcrumb-item active"><la:link href="/admin/badword">
                                <la:message key="labels.bad_word_link_list"/>
                            </la:link></li>
                            <li class="breadcrumb-item active"><la:message
                                    key="labels.bad_word_link_upload"/></li>

```JSON hl_lines="22"
{
    "openapi": "3.1.0",
    "info": {
        "title": "FastAPI",
        "version": "0.1.0"
    },
    "paths": {
        "/items/": {
            "get": {
                "summary": "Read Items",
                "operationId": "read_items_items__get",
                "responses": {
                    "200": {
                        "description": "Successful Response",

}

func getIAMConfig(item any, data []byte, itemPath string) error {
	data, err := decryptData(data, itemPath)
	if err != nil {
		return err
	}
	json := jsoniter.ConfigCompatibleWithStandardLibrary
	return json.Unmarshal(data, item)
}

func (ies *IAMEtcdStore) loadIAMConfig(ctx context.Context, item any, path string) error {
	data, err := readKeyEtcd(ctx, ies.client, path)

Por exemplo, se o cliente tentar enviar um parâmetro de consulta `tool` com o valor `plumbus`, como:

```http
https://example.com/items/?limit=10&tool=plumbus
```

Eles receberão um retorno de **erro** informando-os que o parâmetro de consulta `tool` não é permitido:

```json
{
    "detail": [
        {
            "type": "extra_forbidden",

. }} - secret: name: {{ template "minio.secretName" . }} {{- range .Values.users }} {{- if .existingSecret }} - secret: name: {{ .existingSecret }} items: - key: {{ .existingSecretKey }} path: secrets/{{ .accessKey }} {{- end }} {{- end }} {{- if .Values.tls.enabled }} - name: cert-secret-volume-mc secret: secretName: {{ .Values.tls.certSecret }} items: - key: {{ .Values.tls.publicCrt }} path: CAs/public.crt {{ end }} containers: - name: minio-mc image: "{{ .Values.mcImage.repository }}:{{ .Values.mcImage.tag...

class Session:
    def __init__(self) -> None:
        self.data = ["foo", "bar", "baz"]
        self.open = True

    def __iter__(self) -> Generator[str, None, None]:
        for item in self.data:
            if self.open:
                yield item
            else:
                raise ValueError("Session closed")


@contextmanager
def acquire_session() -> Generator[Session, None, None]:
    session = Session()
    try: