### `///` admonitions

1) Keep the admonition keyword in English (do not translate `note`, `tip`, etc.).
2) Many Traditional Chinese docs currently omit titles in `///` blocks; that is OK.
3) If a generic title is present, prefer these canonical titles:

- `/// note | 注意`

Notes:

		The available sort field are "created", "content_length" and
		"last_modified", and they are customizable.
	</dd>
	<dt>AND</dt>
	<dd>
		AND operator is the default conjunction operator. You can omit it from
		a query. AND operator matches documents where both terms exist
		anywhere in the text of a single document.
		<pre>Fess AND CodeLibs</pre>
	</dd>
	</dd>
	<dt>OR</dt>
	<dd>

<plist version="1.0">
<dict>
	<key>rules</key>
	<dict>
		<key>.*</key>
		<true/>
		<key>Info.plist</key>
		<dict>
			<key>omit</key>
			<true/>
			<key>weight</key>
			<integer>10</integer>
		</dict>
		<key>ResourceRules.plist</key>
		<dict>
			<key>omit</key>
			<true/>
			<key>weight</key>
			<integer>100</integer>
		</dict>
	</dict>
</dict>
</plist>

	}

	if hamster2.OtherToy.ID != hamster.OtherToy.ID || hamster2.OtherToy.Name != hamster.OtherToy.Name {
		t.Errorf("Hamster's other toy failed to preload")
	}

	// clear to omit Toy.ID in count
	hamster2.PreferredToy = Toy{}
	hamster2.OtherToy = Toy{}

	if DB.Model(&hamster2).Association("PreferredToy").Count() != 1 {
		t.Errorf("Hamster's preferred toy count should be 1")
	}

* `allowed_hosts` - A list of domain names that should be allowed as hostnames. Wildcard domains such as `*.example.com` are supported for matching subdomains. To allow any hostname either use `allowed_hosts=["*"]` or omit the middleware.
* `www_redirect` - If set to True, requests to non-www versions of the allowed hosts will be redirected to their www counterparts. Defaults to `True`.

        return buffer.toString();
    }

    /**
     * Creates a string with all location details for the specified model problem. If the project identifier is
     * provided, the generated location will omit the model id and source information and only give line/column
     * information for problems originating directly from this POM.
     *

* `tax: float = 10.5` has a default of `10.5`.
* `tags: List[str] = []` has a default of an empty list: `[]`.

but you might want to omit them from the result if they were not actually stored.

For example, if you have models with many optional attributes in a NoSQL database, but you don't want to send very long JSON responses full of default values.

As in this case the function is not async, the right return type would be `Iterable[Item]`:

{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[28:31] hl[29] *}

### No Return Type { #no-return-type }

You can also omit the return type. FastAPI will use the [`jsonable_encoder`](./encoder.md) to convert the data and send it.

{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[34:37] hl[35] *}

## `ServerSentEvent` { #serversentevent }

{* ../../docs_src/stream_json_lines/tutorial001_py310.py ln[27:30] hl[28] *}

### No Return Type { #no-return-type }

You can also omit the return type. FastAPI will then use the [`jsonable_encoder`](./encoder.md) to convert the data to something that can be serialized to JSON and then send it as JSON Lines.

But the example here uses `PATCH` because it was created for these use cases.

///

/// note

Notice that the input model is still validated.

So, if you want to receive partial updates that can omit all the attributes, you need to have a model with all the attributes marked as optional (with default values or `None`).