"name": "The Baz"
        }
    ]
}
```

/// info

Notice how the `images` key now has a list of image objects.

///

## Deeply nested models { #deeply-nested-models }

You can define arbitrarily deeply nested models:

{* ../../docs_src/body_nested_models/tutorial007_py310.py hl[7,12,18,21,25] *}

/// info

Apart from all the fancy words used here, the **Dependency Injection** system is quite simple.

Just functions that look the same as the *path operation functions*.

But still, it is very powerful, and allows you to declare arbitrarily deeply nested dependency "graphs" (trees).

/// tip

All this might not seem as useful with these simple examples.

But you will see how useful it is in the chapters about **security**.

            }
        }
    }
}
```

### Custom OpenAPI *path operation* schema { #custom-openapi-path-operation-schema }

The dictionary in `openapi_extra` will be deeply merged with the automatically generated OpenAPI schema for the *path operation*.

So, you could add additional data to the automatically generated schema.

FastAPI Cloud is the primary sponsor and funding provider for the *FastAPI and friends* open source projects. ✨

#### Deploy to other cloud providers { #deploy-to-other-cloud-providers }

FastAPI is open source and based on standards. You can deploy FastAPI apps to any cloud provider you choose.

Follow your cloud provider's guides to deploy FastAPI apps with them. 🤓

## Performance { #performance }

FastAPI Cloud is the primary sponsor and funding provider for the *FastAPI and friends* open source projects. ✨

#### Deploy to other cloud providers

FastAPI is open source and based on standards. You can deploy FastAPI apps to any cloud provider you choose.

Follow your cloud provider's guides to deploy FastAPI apps with them. 🤓

## Performance

        {
            "url": "http://example.com/dave.jpg",
            "name": "The Baz"
        }
    ]
}
```

/// info

注意 `images` 鍵現在是一個由 image 物件組成的列表。

///

## 深度巢狀模型 { #deeply-nested-models }

你可以定義任意深度的巢狀模型：

{* ../../docs_src/body_nested_models/tutorial007_py310.py hl[7,12,18,21,25] *}

/// info

請注意，`Offer` 具有一個 `Item` 的列表，而每個 `Item` 又有一個可選的 `Image` 列表。

///

            assertTrue(result.contains("NullPointerException"));
            assertTrue(result.contains("\n"));
        }

        @Test
        @DisplayName("Should handle deeply nested exceptions")
        void testToStringWithNestedExceptions() {
            Exception innermost = new IOException("Innermost exception");
            Exception middle = new RuntimeException("Middle exception", innermost);

        assertEquals("original2", retrievedValues[1]);

        // Modify retrieved array
        retrievedValues[0] = "modified1";

        // Verify the parameter's values can still be modified (not deeply immutable)
        assertEquals("modified1", param.getValues()[0]);

        // This shows that the class returns the same array reference
        assertSame(retrievedValues, param.getValues());
    }

import java.io.FilterReader;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

/**
 * Deeply opinionated file filter that adds elements to the release notes HTML page.
 */
public class ReleaseNotesTransformer extends FilterReader {
    private File baseCss;
    private File releaseNotesCss;

            "url": "http://example.com/dave.jpg",
            "name": "The Baz"
        }
    ]
}
```

/// info | 정보

`images` 키가 이제 이미지 객체 리스트를 갖는지 주목하세요.

///

## 깊게 중첩된 모델 { #deeply-nested-models }

임의로 깊게 중첩된 모델을 정의할 수 있습니다:

{* ../../docs_src/body_nested_models/tutorial007_py310.py hl[7,12,18,21,25] *}

/// info | 정보