首先，你需要匯入它：

{* ../../docs_src/body_fields/tutorial001_an_py310.py hl[4] *}


/// warning

請注意，`Field` 是直接從 `pydantic` 匯入的，不像其他（如 `Query`、`Path`、`Body` 等）是從 `fastapi` 匯入。

///

## 宣告模型屬性 { #declare-model-attributes }

接著你可以在模型屬性上使用 `Field`：

{* ../../docs_src/body_fields/tutorial001_an_py310.py hl[11:14] *}

`Field` 的用法與 `Query`、`Path`、`Body` 相同，擁有相同的參數等。

/// note | 技術細節

/**
 * Strategy for applying Maven inference optimizations.
 * For 4.0.0 models: applies limited inference (parent-related only).
 * For 4.1.0+ models: applies full inference optimizations.
 * Removes redundant information that can be inferred by Maven during model building.
 */
@Named
@Singleton
@Priority(30)
public class InferenceStrategy extends AbstractUpgradeStrategy {

	//  a large number of policies
	r, err := ies.client.Get(ctx, iamConfigPoliciesPrefix, etcd.WithPrefix())
	if err != nil {
		return err
	}

	// Parse all values to construct the policies data model.
	for _, kvs := range r.Kvs {
		if err = ies.getPolicyDocKV(ctx, kvs, m); err != nil && !errors.Is(err, errNoSuchPolicy) {
			return err
		}
	}
	return nil
}

    public static final String ERROR_TIMEOUT = "timeout";

    /** Error code for context length exceeded. */
    public static final String ERROR_CONTEXT_LENGTH_EXCEEDED = "context_length_exceeded";

    /** Error code for model not found. */
    public static final String ERROR_MODEL_NOT_FOUND = "model_not_found";

    /** Error code for invalid response from the LLM provider. */
    public static final String ERROR_INVALID_RESPONSE = "invalid_response";

        @Test
        @DisplayName("should inherit behavior from AbstractUpgradeGoal")
        void shouldInheritBehaviorFromAbstractUpgradeGoal() {
            // This test verifies that Check inherits the model version logic from AbstractUpgradeGoal
            // The actual logic is tested in AbstractUpgradeGoalTest
            // Here we just verify that Check is properly configured as a subclass

      description: If compiling from source
  - type: input
    id: Cuda
    attributes:
      label: CUDA/cuDNN version
  - type: input
    id: Gpu
    attributes:
      label: GPU model and memory
      description: If compiling from source
  - type: textarea
    id: what-happened
    attributes:
      label: Current behavior?
      description: Also tell us, what did you expect to happen?

首先，从 Pydantic 中导入 `Field`：

{* ../../docs_src/body_fields/tutorial001_an_py310.py hl[4] *}

/// warning | 警告

注意，与从 `fastapi` 导入 `Query`，`Path`、`Body` 不同，要直接从 `pydantic` 导入 `Field` 。

///

## 声明模型属性 { #declare-model-attributes }

然后，使用 `Field` 定义模型的属性：

{* ../../docs_src/body_fields/tutorial001_an_py310.py hl[11:14] *}

`Field` 的工作方式和 `Query`、`Path`、`Body` 相同，参数也相同。

/// note | 技术细节

### Consistency Guarantees

MinIO follows strict **read-after-write** and **list-after-write** consistency model for all i/o operations both in distributed and standalone modes. This consistency model is only guaranteed if you use disk filesystems such as xfs, zfs or btrfs etc.. for distributed setup.

# クッキーパラメータモデル { #cookie-parameter-models }

もし関連する**複数のクッキー**から成るグループがあるなら、それらを宣言するために、**Pydanticモデル**を作成できます。🍪

こうすることで、**複数の場所**で**そのPydanticモデルを再利用**でき、バリデーションやメタデータを、すべてのパラメータに対して一度に宣言できます。😎

/// note | 備考

この機能は、FastAPIのバージョン `0.115.0` からサポートされています。🤓

///

/// tip | 豆知識

これと同じテクニックは `Query` 、 `Cookie` 、 `Header` にも適用できます。 😎

///

## Pydanticモデルを使用したクッキー { #cookies-with-a-pydantic-model }

   * triggered by cancel(). For details, see the comments on the fields of TimeoutFuture.
   *
   * <p>{@code volatile} is required for j2objc transpiling:
   * https://developers.google.com/j2objc/guides/j2objc-memory-model#atomicity
   */
  private volatile @Nullable InterruptibleTask<?> task;

  TrustedListenableFutureTask(Callable<V> callable) {
    this.task = new TrustedFutureInterruptibleTask(callable);
  }