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  2. github.com/minio/minio

    internal/s3select/json/preader.go 

    	for len(r.current) <= r.recordsRead {
		if r.err != nil {
			return nil, r.err
		}
		// Move to next block
		item, ok := <-r.queue
		if !ok {
			r.err = io.EOF
			return nil, r.err
		}
		r.kvDstPool.Put(r.current)
		r.current = <-item.dst
		r.err = item.err
		r.recordsRead = 0
	}
	kvRecord := r.current[r.recordsRead]
	r.recordsRead++

	dstRec, ok := dst.(*Record)
	if !ok {
    Created: Sun Dec 28 19:28:13 GMT 2025
    - Last Modified: Tue May 27 15:19:03 GMT 2025
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  3. github.com/tiangolo/fastapi

    docs/zh/docs/tutorial/query-params.md 

                "type": "value_error.missing"
        }
    ]
}
```

`needy` 是必选参数，因此要在 URL 中设置值：

```
http://127.0.0.1:8000/items/foo-item?needy=sooooneedy
```

……这样就正常了：

```JSON
{
    "item_id": "foo-item",
    "needy": "sooooneedy"
}
```

当然，把一些参数定义为必选，为另一些参数设置默认值，再把其它参数定义为可选，这些操作都是可以的：

{* ../../docs_src/query_params/tutorial006_py310.py hl[8] *}
    Created: Sun Dec 28 07:19:09 GMT 2025
    - Last Modified: Mon Nov 18 02:25:44 GMT 2024
    - 4.3K bytes
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  4. github.com/tiangolo/fastapi

    docs/es/docs/advanced/additional-responses.md 

                        "message": {
                        "title": "Message",
                        "type": "string"
                    }
                }
            },
            "Item": {
                "title": "Item",
                "required": [
                    "id",
                    "value"
                ],
                "type": "object",
                "properties": {
    Created: Sun Dec 28 07:19:09 GMT 2025
    - Last Modified: Wed Dec 17 20:41:43 GMT 2025
    - 9.3K bytes
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  5. github.com/tiangolo/fastapi

    docs/de/docs/advanced/additional-responses.md 

                        "message": {
                        "title": "Message",
                        "type": "string"
                    }
                }
            },
            "Item": {
                "title": "Item",
                "required": [
                    "id",
                    "value"
                ],
                "type": "object",
                "properties": {
    Created: Sun Dec 28 07:19:09 GMT 2025
    - Last Modified: Wed Dec 17 20:41:43 GMT 2025
    - 10K bytes
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  6. github.com/tiangolo/fastapi

    docs/en/docs/advanced/additional-responses.md 

                        "message": {
                        "title": "Message",
                        "type": "string"
                    }
                }
            },
            "Item": {
                "title": "Item",
                "required": [
                    "id",
                    "value"
                ],
                "type": "object",
                "properties": {
    Created: Sun Dec 28 07:19:09 GMT 2025
    - Last Modified: Wed Dec 17 20:41:43 GMT 2025
    - 8.9K bytes
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  7. github.com/tiangolo/fastapi

    docs_src/path_params_numeric_validations/tutorial005_an_py39.py 

    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", gt=0, le=1000)],
    q: str,
):
    results = {"item_id": item_id}
    if q:
        results.update({"q": q})
    Created: Sun Dec 28 07:19:09 GMT 2025
    - Last Modified: Sat Mar 18 12:29:59 GMT 2023
    - 331 bytes
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  8. github.com/tiangolo/fastapi

    docs_src/websockets/tutorial002_an_py39.py 

    html = """
<!DOCTYPE html>
<html>
    <head>
        <title>Chat</title>
    </head>
    <body>
        <h1>WebSocket Chat</h1>
        <form action="" onsubmit="sendMessage(event)">
            <label>Item ID: <input type="text" id="itemId" autocomplete="off" value="foo"/></label>
            <label>Token: <input type="text" id="token" autocomplete="off" value="some-key-token"/></label>
    Created: Sun Dec 28 07:19:09 GMT 2025
    - Last Modified: Sat Mar 18 12:29:59 GMT 2023
    - 2.8K bytes
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  9. github.com/tiangolo/fastapi

    tests/test_tutorial/test_query_params/test_tutorial006.py 

                            },
                    },
                    "summary": "Read User Item",
                    "operationId": "read_user_item_items__item_id__get",
                    "parameters": [
                        {
                            "required": True,
                            "schema": {"title": "Item Id", "type": "string"},
                            "name": "item_id",
    Created: Sun Dec 28 07:19:09 GMT 2025
    - Last Modified: Sat Dec 27 18:19:10 GMT 2025
    - 5.3K bytes
    - Click Count (0)
  10. github.com/tiangolo/fastapi

    docs_src/query_params_str_validations/tutorial009_an_py39.py 

    from typing import Annotated, Union

from fastapi import FastAPI, Query

app = FastAPI()


@app.get("/items/")
async def read_items(q: Annotated[Union[str, None], Query(alias="item-query")] = None):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})
    Created: Sun Dec 28 07:19:09 GMT 2025
    - Last Modified: Sat Mar 18 12:29:59 GMT 2023
    - 327 bytes
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  11. github.com/tiangolo/fastapi

    docs/pt/docs/tutorial/handling-errors.md 

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

Mas se o cliente faz uma requisição para `http://example.com/items/bar` (ou seja, um não existente `item_id "bar"`), esse cliente receberá um HTTP status code 404 (o erro "não encontrado" — *not found error*), e uma resposta JSON:

```JSON
{
  "detail": "Item not found"
}
```

/// tip | Dica
    Created: Sun Dec 28 07:19:09 GMT 2025
    - Last Modified: Wed Dec 17 20:41:43 GMT 2025
    - 10.2K bytes
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