return; // TODO: b/136041958 - Running very slowly on Windows CI.
    }
    final CyclicBarrier barrier =
        new CyclicBarrier(
            6 // for the setter threads
                + 50 // for the listeners
                + 50 // for the blocking get threads,
                + 1); // for the main thread
    final ExecutorService executor = Executors.newFixedThreadPool(barrier.getParties());

    `Union` в `Union[str, None]` позволит редактору кода оказать вам лучшую поддержку и найти ошибки.

## Расширенная валидация

Добавим дополнительное условие валидации параметра `q` - **длина строки не более 50 символов** (условие проверяется всякий раз, когда параметр `q` не является `None`).

### Импорт `Query` и `Annotated`

Чтобы достичь этого, первым делом нам нужно импортировать:

* `Query` из пакета `fastapi`:

query.boost.fuzzy.content.expansions=10
query.boost.fuzzy.content.prefix_length=0
query.boost.fuzzy.content.transpositions=true

query.prefix.expansions=50
query.prefix.slop=0
query.fuzzy.prefix_length=0
query.fuzzy.expansions=50
query.fuzzy.transpositions=true

# facet
query.facet.fields=label
query.facet.fields.size=100
query.facet.fields.min_doc_count=1
query.facet.fields.sort=count.desc

      return; // TODO: b/136041958 - Running very slowly on Windows CI.
    }
    final CyclicBarrier barrier =
        new CyclicBarrier(
            6 // for the setter threads
                + 50 // for the listeners
                + 50 // for the blocking get threads,
                + 1); // for the main thread
    final ExecutorService executor = Executors.newFixedThreadPool(barrier.getParties());

    for (int n = 0; n <= 50; n++) {
      for (int k = 0; k <= n; k++) {
        BigInteger expectedBig = BigIntegerMath.binomial(n, k);
        int expectedInt = fitsInInt(expectedBig) ? expectedBig.intValue() : Integer.MAX_VALUE;
        assertEquals(expectedInt, IntMath.binomial(n, k));
      }
    }
  }

  public void testBinomialOutside() {
    for (int n = 0; n <= 50; n++) {
      try {

    `Union[str, None]` hingegen erlaubt ihren Editor, Sie besser zu unterstützen und Fehler zu erkennen.

## Zusätzliche Validierung

Wir werden bewirken, dass, obwohl `q` optional ist, wenn es gegeben ist, **seine Länge 50 Zeichen nicht überschreitet**.

### `Query` und `Annotated` importieren

Importieren Sie zuerst:

* `Query` von `fastapi`
* `Annotated` von `typing` (oder von `typing_extensions` in Python unter 3.9)

    for (int n = 0; n <= 50; n++) {
      for (int k = 0; k <= n; k++) {
        BigInteger expectedBig = BigIntegerMath.binomial(n, k);
        int expectedInt = fitsInInt(expectedBig) ? expectedBig.intValue() : Integer.MAX_VALUE;
        assertEquals(expectedInt, IntMath.binomial(n, k));
      }
    }
  }

  public void testBinomialOutside() {
    for (int n = 0; n <= 50; n++) {
      try {

But now, having `Query(max_length=50)` inside of `Annotated`, we are telling FastAPI that we want it to extract this value from the query parameters (this would have been the default anyway 🤷) and that we want to have **additional validation** for this value (that's why we do this, to get the additional validation). 😎

FastAPI will now:

* **Validate** the data making sure that the max length is 50 characters

                "{\"function_score\":{\"query\":{\"bool\":{\"should\":[{\"match_phrase_prefix\":{\"title\":{\"query\":\"query\",\"slop\":0,\"max_expansions\":50,\"zero_terms_query\":\"NONE\",\"boost\":0.5}}},{\"match_phrase_prefix\":{\"content\":{\"query\":\"query\",\"slop\":0,\"max_expansions\":50,\"zero_terms_query\":\"NONE\",\"boost\":0.05}}}],\"adjust_pure_negative\":true,\"boost\":1.0}},\"functions\":[{\"filter\":{\"match_all\":{\"boost\":1.0}},\"field_value_factor\":{\...

	type ItemContent struct {
		gorm.Model
		ItemID       uint   `gorm:"not null"`
		Name         string `gorm:"not null;type:varchar(50)"`
		LanguageCode string `gorm:"not null;type:varchar(2)"`
	}
	type Item struct {
		gorm.Model
		Logo     string        `gorm:"not null;type:varchar(50)"`
		Contents []ItemContent `gorm:"foreignKey:ItemID"`
	}

	tx := DB.Session(&gorm.Session{})