This will make FastAPI skip the response model generation and that way you can have any return type annotations you need without it affecting your FastAPI application. 🤓

## Response Model encoding parameters { #response-model-encoding-parameters }

Your response model could have default values, like:

{* ../../docs_src/response_model/tutorial004_py310.py hl[9,11:12] *}

	tx := DB.Begin()

	user := *GetUser("transaction-save-point", Config{})
	tx.Create(&user)

	if err := tx.First(&User{}, "name = ?", user.Name).Error; err != nil {
		t.Fatalf("Should find saved record")
	}

	if err := tx.SavePoint("save_point1").Error; err != nil {
		t.Fatalf("Failed to save point, got error %v", err)
	}

	user1 := *GetUser("transaction-save-point-1", Config{})
	tx.Create(&user1)

     *       thread
     *   <li>If this field's value == null because of unsafe publication, we know that it isn't the
     *       object associated with our thread, because if it was the publication wouldn't have been
     *       unsafe and we'd have seen our thread as the value. This state is also why a new
     *       ThreadConfinedTaskQueue object must be created for each inline execution, because

* It should probably have a declaration of the body it should receive, e.g. `body: InvoiceEvent`.
* And it could also have a declaration of the response it should return, e.g. `response_model=InvoiceEventReceived`.

{* ../../docs_src/openapi_callbacks/tutorial001.py hl[16:18,21:22,28:32] *}

There are 2 main differences from a normal *path operation*:

```console
// আপনি চাইলে MY_NAME নামে একটি env var তৈরি করতে পারেন
$ export MY_NAME="Wade Wilson"

// তারপরে এটিকে চাইলে অন্যান্য প্রোগ্রামে ব্যবহার করতে পারেন
$ echo "Hello $MY_NAME"

Hello Wade Wilson
```

</div>

////

//// tab | উইন্ডোজ পাওয়ারশেল

<div class="termy">

```console
// MY_NAME নামে env var তৈরি
$ $Env:MY_NAME = "Wade Wilson"

// অন্যান্য প্রোগ্রামে এটিকে ব্যবহার
$ echo "Hello $Env:MY_NAME"

```console
// Podrías crear una env var MY_NAME con
$ export MY_NAME="Wade Wilson"

// Luego podrías usarla con otros programas, como
$ echo "Hello $MY_NAME"

Hello Wade Wilson
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
// Crea una env var MY_NAME
$ $Env:MY_NAME = "Wade Wilson"

// Úsala con otros programas, como
$ echo "Hello $Env:MY_NAME"

	// Offset and out size cannot be negative.
	if offset < 0 || length < 0 {
		return 0, errUnexpected
	}

	// Do we have enough blocks?
	if len(enBlocks) < dataBlocks {
		return 0, reedsolomon.ErrTooFewShards
	}

	// Do we have enough data?
	if int64(getDataBlockLen(enBlocks, dataBlocks)) < length {
		return 0, reedsolomon.ErrShortData
	}

	// Counter to decrement total left to write.

What inspired **FastAPI**, how it compares to alternatives and what it learned from them.

## Intro { #intro }

**FastAPI** wouldn't exist if not for the previous work of others.

There have been many tools created before that have helped inspire its creation.

I have been avoiding the creation of a new framework for several years. First I tried to solve all the features covered by **FastAPI** using many different frameworks, plug-ins, and tools.

```JSON
{
    "item": {
        "name": "Foo",
        "description": "The pretender",
        "price": 42.0,
        "tax": 3.2
    },
    "user": {
        "username": "dave",
        "full_name": "Dave Grohl"
    }
}
```

/// note

👀 👈 ✋️ `item` 📣 🎏 🌌 ⏭, ⚫️ 🔜 ⌛ 🔘 💪 ⏮️ 🔑 `item`.

///

**FastAPI** 🔜 🏧 🛠️ ⚪️➡️ 📨, 👈 🔢 `item` 📨 ⚫️ 🎯 🎚 & 🎏 `user`.

	child := Child{ParentID: &parent.ID, Parent: &parent}
	DB.Create(&child)

	parent.FavChildID = child.ID
	parent.FavChild = &child
	DB.Save(&parent)

	var parent1 Parent
	DB.First(&parent1, parent.ID)
	AssertObjEqual(t, parent, parent1, "ID", "FavChildID")

	// Save and Updates is the same
	DB.Updates(&parent)
	DB.First(&parent1, parent.ID)
	AssertObjEqual(t, parent, parent1, "ID", "FavChildID")
}