/// info

`Body` also has all the same extra validation and metadata parameters as `Query`,`Path` and others you will see later.

///

## Embed a single body parameter { #embed-a-single-body-parameter }

Let's say you only have a single `item` body parameter from a Pydantic model `Item`.

By default, **FastAPI** will then expect its body directly.

    options:
        members:
            - chunk_size
            - charset
            - status_code
            - media_type
            - body
            - background
            - raw_headers
            - render
            - init_headers
            - headers
            - set_cookie
            - delete_cookie

::: fastapi.responses.HTMLResponse
    options:
        members:
            - charset

➡️ 💬 👆 🕴 ✔️ 👁 `item` 💪 🔢 ⚪️➡️ Pydantic 🏷 `Item`.

🔢, **FastAPI** 🔜 ⤴️ ⌛ 🚮 💪 🔗.

✋️ 🚥 👆 💚 ⚫️ ⌛ 🎻 ⏮️ 🔑 `item` & 🔘 ⚫️ 🏷 🎚, ⚫️ 🔨 🕐❔ 👆 📣 ➕ 💪 🔢, 👆 💪 ⚙️ 🎁 `Body` 🔢 `embed`:

```Python
item: Item = Body(embed=True)
```

:

{* ../../docs_src/body_multiple_params/tutorial005.py hl[17] *}

👉 💼 **FastAPI** 🔜 ⌛ 💪 💖:

```JSON hl_lines="2"
{
    "item": {

```Python
item: Item = Body(embed=True)
```

so wie in:

{* ../../docs_src/body_multiple_params/tutorial005_an_py310.py hl[17] *}

In diesem Fall erwartet **FastAPI** einen Body wie:

```JSON hl_lines="2"

package jcifs.dcerpc.msrpc;

/**
 * MSRPC implementation for retrieving members of an alias.
 * This class provides functionality to get the list of security identifiers (SIDs)
 * that are members of a specific alias using the SAMR RPC interface.
 */
public class MsrpcGetMembersInAlias extends samr.SamrGetMembersInAlias {

    /**
     * Creates a new request to get members of an alias.
     *
     * @param aliasHandle the handle to the alias

Mas se você quiser que ele espere por um JSON com uma chave `item` e dentro dele os conteúdos do modelo, como ocorre ao declarar vários parâmetros de corpo, você pode usar o parâmetro especial de `Body` chamado `embed`:

```Python
item: Item = Body(embed=True)
```

como em:

{* ../../docs_src/body_multiple_params/tutorial005_py310.py hl[15] *}

Neste caso o **FastAPI** esperará um corpo como:

```JSON hl_lines="2"
{

objectclass: groupofnames
cn: projectx
description: Project X group members
member: uid=alice1,ou=people,ou=hwengg,dc=min,dc=io
member: uid=bobfisher,ou=people,ou=hwengg,dc=min,dc=io

dn: cn=projecty,ou=groups,ou=hwengg,dc=min,dc=io
objectclass: groupofnames
cn: projecty
description: Project Y group members
member: uid=bobfisher,ou=people,ou=hwengg,dc=min,dc=io
member: uid=cody3,ou=people,ou=hwengg,dc=min,dc=io

    // Exists only for hierarchy mapping; no members.
  }

  private interface HierarchyFixtureSubinterface extends HierarchyFixtureInterface {
    // Exists only for hierarchy mapping; no members.
  }

  private static class HierarchyFixtureParent implements HierarchyFixtureSubinterface {
    // Exists only for hierarchy mapping; no members.
  }

	f Float                 // illegal
}
</pre>

<p>
An interface type <code>T</code> may not embed a type element
that is, contains, or embeds <code>T</code>, directly or indirectly.
</p>

<pre>
// illegal: Bad may not embed itself
type Bad interface {
	Bad
}

// illegal: Bad1 may not embed itself using Bad2
type Bad1 interface {
	Bad2
}
type Bad2 interface {
	Bad1
}

objectclass: groupofnames
cn: projectx
description: Project X group members
member: uid=alice1,ou=people,ou=hwengg,dc=min,dc=io
member: uid=bobfisher,ou=people,ou=hwengg,dc=min,dc=io

dn: cn=projecty,ou=groups,ou=hwengg,dc=min,dc=io
objectclass: groupofnames
cn: projecty
description: Project Y group members
member: uid=bobfisher,ou=people,ou=hwengg,dc=min,dc=io