* we can reference a node whose fields have been cleared is inside the iterator (and presumably
     * only under concurrent modification).
     *
     * To access these fields when you know that they are not null, call the pred() and succ()
     * methods, which perform null checks before returning the fields.
     */
    private @Nullable AvlNode<E> pred;

from pydantic import BaseModel, ConfigDict
from pydantic.fields import FieldInfo

from .utils import needs_py310


def test_model_field_default_required():
    from fastapi._compat import v2

    # For coverage
    field_info = FieldInfo(annotation=str)
    field = v2.ModelField(name="foo", field_info=field_info)
    assert field.default is Undefined


def test_complex():
    app = FastAPI()

    Field[] fields = type.getDeclaredFields();
    Arrays.sort(fields, BY_FIELD_NAME);
    for (Field field : fields) {
      if (Modifier.isPublic(field.getModifiers())
          && Modifier.isStatic(field.getModifiers())
          && Modifier.isFinal(field.getModifiers())) {
        if (field.getGenericType() == field.getType() && type.isAssignableFrom(field.getType())) {

    @Mock
    private InputStream mockInputStream;

    @Test
    void constructorShouldInitializeTypeAndLength() {
        // Test that the constructor correctly initializes the type and length fields.
        SessionRetargetResponsePacket packet = new SessionRetargetResponsePacket();
        assertEquals(SessionServicePacket.SESSION_RETARGET_RESPONSE, packet.type);
        assertEquals(6, packet.length);
    }

OAuth2 specifies that when using the "password flow" (that we are using) the client/user must send a `username` and `password` fields as form data.

And the spec says that the fields have to be named like that. So `user-name` or `email` wouldn't work.

But don't worry, you can show it as you wish to your final users in the frontend.

Você pode ler mais no final desta página.

///

## Argumentos adicionais de `Field` { #field-additional-arguments }

Ao usar `Field()` com modelos Pydantic, você também pode declarar `examples` adicionais:

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

Puedes leer más al final de esta página.

///

## Argumentos adicionales en `Field` { #field-additional-arguments }

Cuando usas `Field()` con modelos de Pydantic, también puedes declarar `examples` adicionales:

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

		<fieldset class="mb-3">
			<legend><la:message key="labels.index_label" /></legend>
			<label for="labelTypeSearchOption"><la:message
					key="labels.index_label" /></label>
			<la:select property="fields.label" styleId="labelTypeSearchOption"
				multiple="true" styleClass="form-control">
				<c:forEach var="item" items="${labelTypeItems}">
					<la:option value="${f:u(item.value)}">${f:h(item.label)}</la:option>
				</c:forEach>

                                    </la:info>
                                    <la:errors/>
                                </div>
                                    <%-- Form Fields --%>
                                <table class="table table-bordered" aria-label="<la:message key="labels.duplicate_host_details" />">
                                    <tbody>
                                    <tr>

		<fieldset class="mb-3">
			<legend><la:message key="labels.index_label" /></legend>
			<label for="labelTypeSearchOption"><la:message
					key="labels.index_label" /></label>
			<la:select property="fields.label" styleId="labelTypeSearchOption"
				multiple="true" styleClass="form-control">
				<c:forEach var="item" items="${labelTypeItems}">
					<la:option value="${f:u(item.value)}">${f:h(item.label)}</la:option>
				</c:forEach>