### Membuat class `Enum`

Import `Enum` dan buat *sub-class* warisan dari `str` dan `Enum`.

Dengan warisan dari `str` dokumen API mengetahui nilai nya harus berjenis `string` supaya bisa digunakan dengan benar.

Kemudian buat atribut *class* dengan nilai tetap *string* yang benar:

{* ../../docs_src/path_params/tutorial005.py hl[1,6:9] *}

/// info

---> 100%
```

</div>

**Catatan**: Pastikan anda menulis `"fastapi[standard]"` dengan tanda petik untuk memastikan bisa digunakan di semua *terminal*.

## Contoh

### Buat app

* Buat file `main.py` dengan:

```Python
from typing import Union

from fastapi import FastAPI

app = FastAPI()


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

@REM check for pre script, once with legacy .bat ending and once with .cmd ending
if exist "%USERPROFILE%\mavenrc_pre.bat" echo Warning: The mavenrc_pre.bat script is deprecated and will be removed in a future version. >&2
if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*

    * Tham số `q` được định nghĩa `= None`, nó là tùy chọn.
    * Nếu không phải `None`, nó là bắt buộc (như body trong trường hợp của `PUT`).
* Với request `PUT` tới `/items/{item_id}`, đọc body như JSON:
    * Kiểm tra xem nó có một thuộc tính bắt buộc kiểu  `str` là `name` không?
    * Kiểm tra xem nó có một thuộc tính bắt buộc kiểu `float` là `price` không?

        when(logonInfo.getHomeDirectory()).thenReturn("\\\\server\\\\home");
        when(logonInfo.getHomeDrive()).thenReturn("H:");
        when(logonInfo.getLogonScript()).thenReturn("logon.bat");
        when(logonInfo.getUserAccountControl()).thenReturn(0x200);
        when(logonInfo.getUserFlags()).thenReturn(0);
        when(logonInfo.getUserSid()).thenReturn(userSid);

			t.Errorf("%s: Expected the object name to be `%s`, but instead found `%s`", instanceType, "newPrefix", result.Objects[0].Name)
		}
		if result.Objects[1].Name != "newPrefix2" {
			t.Errorf("%s: Expected the object name to be `%s`, but instead found `%s`", instanceType, "newPrefix", result.Objects[1].Name)
		}
		if result.Objects[2].Name != "obj0" {

			t.Errorf("Test %d: %s: Expected to pass, but failed with: <ERROR> %s.", i+1, instanceType, actualErr.Error())
		}
		if actualErr == nil && !testCase.shouldPass {
			t.Errorf("Test %d: %s: Expected to fail with <ERROR> \"%s\", but passed instead.", i+1, instanceType, testCase.expectedError.Error())
		}
		// Failed as expected, but does it fail for the expected reason.
		if actualErr != nil && !testCase.shouldPass {

If you don't select any scope, you will be "authenticated", but when you try to access `/users/me/` or `/users/me/items/` you will get an error saying that you don't have enough permissions. You will still be able to access `/status/`.

And if you select the scope `me` but not the scope `items`, you will be able to access `/users/me/` but not `/users/me/items/`.

			if r.Name != relation.Name {
				t.Errorf("schema %v relation name expects %v, but got %v", s, r.Name, relation.Name)
			}

			if r.Type != relation.Type {
				t.Errorf("schema %v relation name expects %v, but got %v", s, r.Type, relation.Type)
			}

			if r.Schema.Name != relation.Schema {
				t.Errorf("schema %v relation's schema expects %v, but got %v", s, relation.Schema, r.Schema.Name)
			}

That's why in this example we have to declare it in the `response_model` parameter.

...but continue reading below to see how to overcome that.

## Return Type and Data Filtering { #return-type-and-data-filtering }

Let's continue from the previous example. We wanted to **annotate the function with one type**, but we wanted to be able to return from the function something that actually includes **more data**.