# =====================================================================================
# Without aliases


@app.get("/optional-str")
async def read_optional_str(p: Optional[str] = None):
    return {"p": p}


class QueryModelOptionalStr(BaseModel):
    p: Optional[str] = None


@app.get("/model-optional-str")
async def read_model_optional_str(p: Annotated[QueryModelOptionalStr, Query()]):
    return {"p": p.p}

        doc.classExtensions[1].extensionBlocks.size() == 1
    }

    def classMetaData(String name = 'org.gradle.Class') {
        ClassMetaData classMetaData = Mock()
        _ * classMetaData.className >> name
        return classMetaData
    }

    def classDoc(String name = 'org.gradle.Class') {
        ClassDoc doc = Mock()
        _ * doc.name >> name
        _ * doc.toString() >> "ClassDoc '$name'"

from fastapi import FastAPI
from pydantic import BaseModel


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None


app = FastAPI()


@app.post("/items/")
async def create_item(item: Item):

from dataclasses import dataclass

from fastapi import FastAPI


@dataclass
class Item:
    name: str
    price: float
    description: str | None = None
    tax: float | None = None


app = FastAPI()


@app.post("/items/")
async def create_item(item: Item):

/**
 * DefaultMavenMetadataCache
 */
@Named
@Singleton
@Deprecated
public class DefaultMavenMetadataCache implements MavenMetadataCache {

    protected final Map<CacheKey, CacheRecord> cache = new ConcurrentHashMap<>();

    /**
     * CacheKey
     */
    public static class CacheKey {
        private final Artifact artifact;
        private final long pomHash;

* <a href="https://hub.docker.com/_/postgres" class="external-link" target="_blank">PostgreSQL</a>
* <a href="https://hub.docker.com/_/mysql" class="external-link" target="_blank">MySQL</a>
* <a href="https://hub.docker.com/_/mongo" class="external-link" target="_blank">MongoDB</a>
* <a href="https://hub.docker.com/_/redis" class="external-link" target="_blank">Redis</a>, и т.д.

from fastapi import Cookie, FastAPI
from pydantic import BaseModel

app = FastAPI()


class Cookies(BaseModel):
    model_config = {"extra": "forbid"}

    session_id: str
    fatebook_tracker: str | None = None
    googall_tracker: str | None = None


@app.get("/items/")
async def read_items(cookies: Cookies = Cookie()):

import org.eclipse.aether.repository.RemoteRepository;

/**
 * <strong>Warning:</strong> This is an internal utility class that is only public for technical reasons, it is not part
 * of the public API. In particular, this class can be changed or deleted without prior notice.
 *
 */
@Deprecated
public class LegacyLocalRepositoryManager implements LocalRepositoryManager {

    private final ArtifactRepository delegate;

    @ConsistentCopyVisibility
    data class Kotlin internal constructor(

        override val currentFile: File,

        override val currentSourceRoot: File

    ) : ApiSourceFile()
}


internal
data class JavaSourceQuery<T : Any?>(
    val defaultValue: T,
    val visitor: GenericVisitor<T, Unit?>
)


internal
class SourcesRepository(

    private

///

Execute o exemplo com:

<div class="termy">

```console
$ fastapi dev main.py

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

## Verifique-o { #check-it }

Vá até a documentação interativa em: <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.