* </ul>
 *
 * <p>Usage:
 * <pre>
 * DynamicProperties dynamicProperties = new DynamicProperties("path/to/properties/file");
 * String value = dynamicProperties.getProperty("key");
 * dynamicProperties.setProperty("key", "newValue");
 * dynamicProperties.store();
 * </pre>
 *
 * <p>Exceptions:
 * <ul>

 * FILE_WRITE_DATA</code>) and the target file has the following security
 * descriptor ACEs:
 * <pre>
 * Allow WNET\alice     0x001200A9  Direct
 * Allow Administrators 0x001F01FF  Inherited
 * Allow SYSTEM         0x001F01FF  Inherited
 * </pre>
 * the access check would fail because the direct ACE has an access mask
 * of <code>0x001200A9</code> which doesn't have the

     * <blockquote>
     *
     * <pre>
     * Exception MalformedURLException: unknown protocol: smb
     *     at java.net.URL.&lt;init&gt;(URL.java:480)
     *     at java.net.URL.&lt;init&gt;(URL.java:376)
     *     at java.net.URL.&lt;init&gt;(URL.java:330)
     *     at jcifs.smb.SmbFile.&lt;init&gt;(SmbFile.java:355)
     *     ...
     * </pre>
     * </blockquote>
     */

Vamos criar a primeira versão mais simples do app com um único modelo **SQLModel**.

Depois, vamos melhorá-lo aumentando a segurança e versatilidade com **múltiplos modelos** abaixo. 🤓

### Criar Modelos

Importe o `SQLModel` e crie um modelo de banco de dados:

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[1:11] hl[7:11] *}

A classe `Hero` é muito semelhante a um modelo Pydantic (na verdade, por baixo dos panos, ela *é um modelo Pydantic*).

```Python hl_lines="4  9 10 11 12  25 26 27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):

### Попередження про заміну

Це означає, що якщо Ви хочете оновити елемент `bar`, використовуючи `PUT` з тілом:

```Python
{
    "name": "Barz",
    "price": 3,
    "description": None,
}
```

оскільки він не містить вже збереженого атрибута `"tax": 20.2`, модель введення прийме значення за замовчуванням `"tax": 10.5`.

        }
        // The region before offset and after the payload must remain untouched.
        for (int i = 0; i < offset; i++) {
            final int idx = i;
            assertEquals(0, dst[i], () -> "pre-offset byte " + idx + " modified");
        }
        for (int i = offset + 8; i < dst.length; i++) {
            final int idx = i;
            assertEquals(0, dst[i], () -> "post-payload byte " + idx + " modified");
        }

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  avatarUrl: https://avatars.githubusercontent.com/u/90076947?u=638c65283ac9e9e2c3a0f9d1e3370db4b8a2c58d&v=4
  url: https://github.com/alejsdev
pre-commit-ci:
  login: pre-commit-ci
  count: 41
  avatarUrl: https://avatars.githubusercontent.com/in/68672?v=4
  url: https://github.com/apps/pre-commit-ci
github-actions:
  login: github-actions
  count: 26
  avatarUrl: https://avatars.githubusercontent.com/in/15368?v=4

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):

The following Bucket features will **not be replicated**, is designed to differ between sites:

- Bucket notification configuration
- Bucket lifecycle (ILM) configuration

## Pre-requisites