{* ../../docs_src/query_params_str_validations/tutorial008_an_py310.py hl[14] *}

## 別名參數 { #alias-parameters }

想像你希望參數名稱是 `item-query`。

像這樣：

```
http://127.0.0.1:8000/items/?item-query=foobaritems
```

但 `item-query` 不是合法的 Python 變數名稱。

最接近的大概是 `item_query`。

但你仍然需要它就是 `item-query`...

那你可以宣告一個 `alias`，實際上就會用這個別名來讀取參數值：

												<la:message key="labels.profile" />
											</la:link>
										</c:if>
										<c:if test="${adminUser == true}">
											<la:link href="/admin" styleClass="dropdown-item">
												<la:message key="labels.administration" />
											</la:link>
										</c:if>
										<la:link href="/logout/" styleClass="dropdown-item">
											<la:message key="labels.logout" />

												<la:message key="labels.profile" />
											</la:link>
										</c:if>
										<c:if test="${adminUser == true}">
											<la:link href="/admin" styleClass="dropdown-item">
												<la:message key="labels.administration" />
											</la:link>
										</c:if>
										<la:link href="/logout/" styleClass="dropdown-item">
											<la:message key="labels.logout" />

from typing import Annotated

from fastapi import FastAPI, Path

app = FastAPI()


@app.get("/items/{item_id}")
async def read_items(
    item_id: Annotated[int, Path(title="The ID of the item to get", ge=1)], q: str
):
    results = {"item_id": item_id}
    if q:
        results.update({"q": q})

                        "properties": {
                            "detail": {
                                "title": "Detail",
                                "type": "array",
                                "items": {
                                    "$ref": "#/components/schemas/ValidationError"
                                },
                            }
                        },
                    },

///

## Writing templates { #writing-templates }

Then you can write a template at `templates/item.html` with, for example:

```jinja hl_lines="7"
{!../../docs_src/templates/templates/item.html!}
```

### Template Context Values { #template-context-values }

In the HTML that contains:

{% raw %}

```jinja
Item ID: {{ id }}
```

{% endraw %}

Bu örnekte, client var olmayan bir ID ile bir item istediğinde, `404` status code’u ile bir exception raise edelim:

{* ../../docs_src/handling_errors/tutorial001_py310.py hl[11] *}

### Ortaya Çıkan Response { #the-resulting-response }

Client `http://example.com/items/foo` (bir `item_id` `"foo"`) isterse, HTTP status code olarak 200 ve şu JSON response’u alır:

```JSON
{
  "item": "The Foo Wrestlers"
}
```

///

Eso significa: "la variable `items` es una `list`, y cada uno de los ítems en esta lista es un `str`".

Al hacer eso, tu editor puede proporcionar soporte incluso mientras procesa elementos de la lista:

<img src="/img/python-types/image05.png">

Sin tipos, eso es casi imposible de lograr.

Nota que la variable `item` es uno de los elementos en la lista `items`.

app.mount("/static", StaticFiles(directory="static"), name="static")


templates = Jinja2Templates(directory="templates")


@app.get("/items/{id}", response_class=HTMLResponse)
async def read_item(request: Request, id: str):
    return templates.TemplateResponse(
        request=request, name="item.html", context={"id": id}

                    "message": {
                        "title": "Message",
                        "type": "string"
                    }
                }
            },
            "Item": {
                "title": "Item",
                "required": [
                    "id",
                    "value"
                ],
                "type": "object",
                "properties": {