## Pydantic { #pydantic }

所有資料驗證都由 [Pydantic](https://docs.pydantic.dev/) 在底層處理，因此你能直接受惠。而且你可以放心使用。

你可以用相同的型別宣告搭配 `str`、`float`、`bool` 與許多更複雜的資料型別。

這些之中的好幾個會在接下來的教學章節中介紹。

## 順序很重要 { #order-matters }

在建立「路徑操作」時，你可能會遇到有固定路徑的情況。

像是 `/users/me`，假設它用來取得目前使用者的資料。

然後你也可能有一個路徑 `/users/{user_id}` 用來依使用者 ID 取得特定使用者的資料。

因為「路徑操作」會依宣告順序來比對，你必須確保 `/users/me` 的路徑在 `/users/{user_id}` 之前宣告：

        return String.join("\n", names);
    }

    public static String getDependencyName(Map<String, String> mappings, String dependencyName) {
        // order is the same for keys and values iteration since we use a linked hashmap
        List<String> mapped = new ArrayList<>(mappings.values());

    protected boolean httpOnly = true;

    /**
     * Retrieves the user code for the current request.
     * The user code is used to uniquely identify users across sessions and requests.
     * It checks multiple sources in order: request attribute, request parameter, cookie, user bean, or generates a new one.
     *
     * @return the user code string, or null if no valid session exists
     */
    public String getUserCode() {

   * higher value than you need can waste space and time, and a significantly lower value can lead
   * to thread contention. But overestimates and underestimates within an order of magnitude do not
   * usually have much noticeable impact. A value of one permits only one thread to modify the map
   * at a time, but since read operations can proceed concurrently, this still yields higher

                    throw new InvalidQueryException(
                            messages -> messages.addErrorsInvalidQueryUnsupportedSortOrder(UserMessages.GLOBAL_PROPERTY_KEY, values[1]),
                            "Invalid sort order: " + termQuery);
                }
            } else {
                sortOrder = SortOrder.ASC;
            }
            context.addSorts(createFieldSortBuilder(sortField, sortOrder));
        }));

 *
 * @param historyDays days number of days to store build history .
 * @param artifactsDays number of days to store artifacts. In the stored history, artifacts older than this number will be cleaned up.
 * @param artifactsPatterns patterns for artifacts clean-up. If not specified, all artifacts will be removed.
 */
fun Project.cleanupRule(
    historyDays: Int,
    artifactsDays: Int,

      .tlsVersions(*tlsVersionsIntersection)
      .build()
  }

  /**
   * Returns `true` if the socket, as currently configured, supports this connection spec. In
   * order for a socket to be compatible the enabled cipher suites and protocols must intersect.
   *
   * For cipher suites, at least one of the [required cipher suites][cipherSuites] must match the

        this.runnable = runnable;
        this.executor = executor;
        this.next = next;
      }
    }
  }

  // A version of the ExecutionList that uses an explicit tail pointer to keep the nodes in order
  // rather than flipping the stack in execute().
  private static final class NewExecutionListQueue {
    static final Logger log = Logger.getLogger(NewExecutionListQueue.class.getName());

    @GuardedBy("this")

   * of Java 20, it always throws an exception, and as of Java 26, the method does not even exist.
   * For now, we continue using it to clean up under older JDKs.
   *
   * Our usages should at least be *relatively* safe: Typically, threads started by a test are dying
   * at the end of the test, so there is no object state put at risk by stopping the threads

Puedes usar las mismas declaraciones de tipo con `str`, `float`, `bool` y muchos otros tipos de datos complejos.

Varios de estos se exploran en los siguientes capítulos del tutorial.

## El orden importa { #order-matters }

Al crear *path operations*, puedes encontrarte en situaciones donde tienes un path fijo.

Como `/users/me`, imaginemos que es para obtener datos sobre el usuario actual.