*
 * <p>This class is used only for micro-optimization. Standard {@code Future} utilities benefit from
 * this optimization, so there is no need to specialize methods to return or accept this type
 * instead of {@code ListenableFuture}.
 *
 * <p>This class is GWT-compatible.
 *
 * @since {@code com.google.guava:failureaccess:1.0}, which was added as a dependency of Guava in
 *     Guava 27.0
 */

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

erhält er eine **Error-Response**, die ihm mitteilt, dass der Query-Parameter `tool` nicht erlaubt ist:

```json
{
    "detail": [
        {
            "type": "extra_forbidden",
            "loc": ["query", "tool"],
            "msg": "Extra inputs are not permitted",
            "input": "plumbus"
        }
    ]
}
```

## Zusammenfassung { #summary }

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

They will receive an **error** response telling them that the query parameter `tool` is not allowed:

```json
{
    "detail": [
        {
            "type": "extra_forbidden",
            "loc": ["query", "tool"],
            "msg": "Extra inputs are not permitted",
            "input": "plumbus"
        }
    ]
}
```

## Summary { #summary }

```json
{
    "detail": [
        {
            "type": "extra_forbidden",
            "loc": ["header", "tool"],
            "msg": "Extra inputs are not permitted",
            "input": "plumbus",
        }
    ]
}
```

// Code generated by "stringer -type=HandlerID -output=handlers_string.go -trimprefix=Handler msg.go handlers.go"; DO NOT EDIT.

package grid

import "strconv"

func _() {
	// An "invalid array index" compiler error signifies that the constant values have changed.
	// Re-run the stringer command to generate them again.
	var x [1]struct{}
	_ = x[handlerInvalid-0]
	_ = x[HandlerLockLock-1]
	_ = x[HandlerLockRLock-2]
	_ = x[HandlerLockUnlock-3]

// A HardLimitedReader reads from R but limits the amount of
// data returned to just N bytes. Each call to Read
// updates N to reflect the new amount remaining.
// Read returns EOF when N <= 0 or when the underlying R returns EOF.
type HardLimitedReader struct {
	R io.Reader // underlying reader
	N int64     // max bytes remaining
}

func (l *HardLimitedReader) Read(p []byte) (n int, err error) {
	if l.N < 0 {
		return 0, ErrOverread
	}

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package csv

import (
	"bytes"
	"io"
)

// recordTransform will convert records to always have newline records.
type recordTransform struct {
	reader io.Reader
	// recordDelimiter can be up to 2 characters.
	recordDelimiter []byte
	oneByte         []byte
	useOneByte      bool
}

因此，FastAPI 會負責（透過 Pydantic）過濾掉輸出模型中未宣告的所有資料。

### `response_model` 或回傳型別 { #response-model-or-return-type }

在這種情況下，因為兩個模型不同，如果我們把函式回傳型別註解為 `UserOut`，編輯器和工具會抱怨我們回傳了無效的型別，因為它們是不同的類別。

這就是為什麼在這個例子中我們必須在 `response_model` 參數中宣告它。

...但繼續往下讀看看如何克服這個問題。

## 回傳型別與資料過濾 { #return-type-and-data-filtering }

讓我們延續前一個範例。我們想要用一種型別來註解函式，但實際上希望能夠從函式回傳包含更多資料的內容。

	"os"
	"path"
	"path/filepath"
	"reflect"
	"slices"
	"strings"
	"testing"
	"time"
)

type testError struct{ error }

type fileOps []any // []T where T is (string | int64)

// testFile is an io.ReadWriteSeeker where the IO operations performed
// on it must match the list of operations in ops.
type testFile struct {
	ops fileOps
	pos int64
}

func (f *testFile) Read(b []byte) (int, error) {

   * ImmutableEnumSet/ImmutableSortedSet, regardless of implementation type. It
   * captures their "logical contents" and they are reconstructed using public
   * static factories. This is necessary to ensure that the existence of a
   * particular implementation type is an implementation detail.
   */
  @J2ktIncompatible // serialization