Das ist keine Limitation von **FastAPI**, sondern Teil des HTTP-Protokolls.

///

## Optionaler Datei-Upload { #optional-file-upload }

Sie können eine Datei optional machen, indem Sie Standard-Typannotationen verwenden und den Defaultwert auf `None` setzen:

{* ../../docs_src/request_files/tutorial001_02_an_py310.py hl[9,17] *}

import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Objects;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * CompactHashMap is an implementation of a Map. All optional operations (put and remove) are
 * supported. Null keys and values are supported.
 *
 * <p>{@code containsKey(k)}, {@code put(k, v)} and {@code remove(k)} are all (expected and

import java.util.Locale;

import org.codelibs.fess.opensearch.config.bsentity.BsCrawlingInfoParam;
import org.codelibs.fess.opensearch.config.exbhv.CrawlingInfoBhv;
import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.optional.OptionalEntity;

/**
 * @author ESFlute (using FreeGen)
 */
public class CrawlingInfoParam extends BsCrawlingInfoParam {

    private static final long serialVersionUID = 1L;

///

## Zusätzliche Validierung { #additional-validation }

Wir werden sicherstellen, dass, obwohl `q` optional ist, wann immer es bereitgestellt wird, **seine Länge 50 Zeichen nicht überschreitet**.

### `Query` und `Annotated` importieren { #import-query-and-annotated }

Um dies zu erreichen, importieren Sie zuerst:

   * list is backed by this list, so changes in the returned list are reflected in this list, and
   * vice-versa. The returned list supports all of the optional list operations supported by this
   * list.
   *
   * <p>The returned list is random-access if the specified list is random access.
   *
   * @since 7.0
   */

"minio.fullname" . -}} {{- end -}} {{- end -}} {{/* Determine name for scc role and rolebinding */}} {{- define "minio.sccRoleName" -}} {{- printf "%s-%s" "scc" (include "minio.fullname" .) | trunc 63 | trimSuffix "-" -}} {{- end -}} {{/* Properly format optional additional arguments to Minio binary */}} {{- define "minio.extraArgs" -}} {{- range .Values.extraArgs -}} {{ " " }}{{ . }} {{- end -}} {{- end -}} {{/* Return the proper Docker Image Registry Secret Names */}} {{- define "minio.imagePullSecrets"...

            .add("field11", Arrays.asList("Hello"))
            .add("field12", new ArrayList<>())
            .add("field13", new HashMap<>())
            // Optionals
            .add("field26", Optional.of("World"))
            .add("field27", Optional.absent())
            // Arrays
            .add("field31", new Object[] {"!!!"})
            .add("field32", new boolean[0])
            .add("field33", new byte[0])

 * Basic implementation of the {@link Multimap} interface. This class represents a multimap as a map
 * that associates each key with a collection of values. All methods of {@link Multimap} are
 * supported, including those specified as optional in the interface.
 *
 * <p>To implement a multimap, a subclass must define the method {@link #createCollection()}, which
 * creates an empty collection of values for a key.
 *

			wantErr error
		}
		testClose struct { // Close() == wantErr
			wantErr error
		}
		testFnc any // testHeader | testWrite | testReadFrom | testClose
	)

	vectors := []struct {
		file     string // Optional filename of expected output
		obscured bool   // Whether file is obscured
		tests    []testFnc
	}{{
		// The writer test file was produced with this command:
		// tar (GNU tar) 1.26
		//   ln -s small.txt link.txt

 *
 * <p>By default, {@code BaseEncoding}'s behavior is relatively strict and in accordance with RFC
 * 4648. Decoding rejects characters in the wrong case, though padding is optional. To modify
 * encoding and decoding behavior, use configuration methods to obtain a new encoding with modified
 * behavior:
 *
 * {@snippet :
 * BaseEncoding.base16().lowerCase().decode("deadbeef");
 * }
 *