For example, this model above declares a JSON "`object`" (or Python `dict`) like:

```JSON
{
    "name": "Foo",
    "description": "An optional description",
    "price": 45.2,
    "tax": 3.5
}
```

...as `description` and `tax` are optional (with a default value of `None`), this JSON "`object`" would also be valid:

```JSON
{
    "name": "Foo",
    "price": 45.2
}
```

        "paths": {
            "/users/me": {
                "get": {
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        }
                    },
                    "summary": "Read Current User",

                "get": {
                    "summary": "Root",
                    "operationId": "root__get",
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                    },
                }
            }
        },

            "paths": {
                "/items/": {
                    "get": {
                        "responses": {
                            "200": {
                                "description": "Successful Response",
                                "content": {"application/json": {"schema": {}}},
                            }
                        },
                        "summary": "Read Items",

    /**
     * The name of the web configuration.
     */
    @Required
    @Size(max = 200)
    public String name;

    /**
     * The description of the web configuration.
     */
    @Size(max = 1000)
    public String description;

    /**
     * The URLs to be crawled by this web configuration.
     */
    @Required
    @UriType(protocolType = ProtocolType.WEB)

    /**
     * Creates an {@link java.io.OutputStream} for writing to a file
     * on an SMB server addressed by the URL parameter. See {@link
     * jcifs.smb1.smb1.SmbFile} for a detailed description and examples of
     * the smb URL syntax.
     *
     * @param url An smb URL string representing the file to write to
     * @throws SmbException if an SMB error occurs

      },
      "homePostalAddress" : {
        "type" : "keyword"
      },
      "labeledURI" : {
        "type" : "keyword"
      },
      "roomNumber" : {
        "type" : "keyword"
      },
      "description" : {
        "type" : "keyword"
      },
      "title" : {
        "type" : "keyword"
      },
      "pager" : {
        "type" : "keyword"
      },
      "street" : {
        "type" : "keyword"

{* ../../docs_src/body_nested_models/tutorial004_py310.py hl[18] *}

Das würde bedeuten, dass **FastAPI** einen Body wie folgt erwartet:

```JSON
{
    "name": "Foo",
    "description": "The pretender",
    "price": 42.0,
    "tax": 3.2,
    "tags": ["rock", "metal", "bar"],
    "image": {
        "url": "http://example.com/baz.jpg",
        "name": "The Foo live"
    }
}
```

                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {

        "paths": {
            "/users/me": {
                "get": {
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        }
                    },
                    "summary": "Read Current User",