## `ServerSentEvent` { #serversentevent }

If you need to set SSE fields like `event`, `id`, `retry`, or `comment`, you can yield `ServerSentEvent` objects instead of plain data.

Import `ServerSentEvent` from `fastapi.sse`:

{* ../../docs_src/server_sent_events/tutorial002_py310.py hl[4,26] *}

The `data` field is always encoded as JSON. You can pass any value that can be serialized as JSON, including Pydantic models.

	PrimaryKey    *Field
	PrimaryValue  string
	ForeignKey    *Field
	OwnPrimaryKey bool
}

func (schema *Schema) parseRelation(field *Field) *Relationship {
	var (
		err        error
		fieldValue = reflect.New(field.IndirectFieldType).Interface()
		relation   = &Relationship{
			Name:        field.Name,
			Field:       field,
			Schema:      schema,
			foreignKeys: toColumns(field.TagSettings["FOREIGNKEY"]),

     */
    public KerberosApRequest(ASN1Sequence seq, KerberosKey[] keys) throws PACDecodingException {
        Enumeration<?> fields = seq.getObjects();
        while (fields.hasMoreElements()) {
            ASN1TaggedObject tagged = ASN1Util.as(ASN1TaggedObject.class, fields.nextElement());
            switch (tagged.getTagNo()) {
            case 0:
                ASN1Integer pvno = ASN1Util.as(ASN1Integer.class, tagged);

        assertEquals(SmbComTransaction.TRANS2_QUERY_FS_INFORMATION, cmd.subCommand, "subCommand should be QUERY_FS_INFORMATION");
        // the fields are set in the constructor – check that the counts match
        assertEquals(2, cmd.totalParameterCount, "totalParameterCount should be 2");
        assertEquals(0, cmd.totalDataCount, "totalDataCount should be 0");

Mehr erfahren Sie am Ende dieser Seite.

///

## Zusätzliche Argumente für `Field` { #field-additional-arguments }

Wenn Sie `Field()` mit Pydantic-Modellen verwenden, können Sie ebenfalls zusätzliche `examples` deklarieren:

{* ../../docs_src/schema_extra_example/tutorial002_py310.py hl[2,8:11] *}

        doc.put("lang", "ja");
        doc.put("title", "タイトル");
        // content field is missing

        languageHelper.updateDocument(doc);

        assertEquals("ja", doc.get("lang"));
        assertEquals("タイトル", doc.get("title_ja"));
        assertNull(doc.get("content_ja")); // content field was not present
    }

    @Test
    public void test_getSupportedLanguage_withWhitespace() {

        Map<String, Field> fieldMap = new HashMap<>();

        for (Object member : new DeclaredMembers(beanType, View.FIELDS)) {
            Field field = (Field) member;
            if (!Modifier.isStatic(field.getModifiers())) {
                fieldMap.put(field.getName(), field);
            }
        }

        return fieldMap;
    }

    /**

    public Integer pn;

    /** The number of results to display. */
    @ValidateTypeFailure
    public Integer num;

    /** The languages. */
    public String[] lang;

    /** The fields. */
    public Map<String, String[]> fields = new HashMap<>();

    /** The conditions. */
    public Map<String, String[]> as = new HashMap<>();

    /** The extra queries. */
    public String[] ex_q;

        authenticator = new NtlmPasswordAuthenticator("DOMAIN", "username", "originalPassword");
        NtlmPasswordAuthenticator cloned = authenticator.clone();

        // Get password fields using reflection
        Field passwordField = NtlmPasswordAuthenticator.class.getDeclaredField("password");
        passwordField.setAccessible(true);

        char[] originalPassword = (char[]) passwordField.get(authenticator);

                public interface $TEST_INTERFACE_SIMPLE_NAME {
                    String field = "value";
                    void method();
                }
            """
            : """
                public class $TEST_INTERFACE_SIMPLE_NAME {
                    public String field = "value";
                    public void method() { }
                    public $TEST_INTERFACE_SIMPLE_NAME() { }