"keywords": ["sample"]
        },
        "finnish_stop": {
          "type":       "stop",

          "keywords": ["sample"]
        },
        "finnish_stop": {
          "type":       "stop",

}

type JoinBuilder interface {
	Select(...string) JoinBuilder
	Omit(...string) JoinBuilder
	Where(query interface{}, args ...interface{}) JoinBuilder
	Not(query interface{}, args ...interface{}) JoinBuilder
	Or(query interface{}, args ...interface{}) JoinBuilder
}

type PreloadBuilder interface {
	Select(...string) PreloadBuilder
	Omit(...string) PreloadBuilder

- REPLACED by ADR-000X on 20YY-MM-DD
- DEPRECATED on 20YY-MM-DD
- ACCEPTED on 20YY-MM-DD
- REJECTED on 20YY-MM-DD
- PROPOSED on 20YY-MM-DD

## Context

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna
aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

numpy >= 2.0.0, < 2.2.0 ; python_version <= "3.13"
numpy>=2.2.6 ; python_version == "3.14"
wheel ~= 0.41.2
h5py >= 3.11.0, < 3.15.0 ; python_version <= "3.13"
h5py ~= 3.15.1 ; python_version == "3.14"
lit ~= 17.0.2
opt_einsum == 3.3.0
astunparse == 1.6.3
dill == 0.3.7
astor == 0.7.1
typing_extensions ~= 4.14.1
gast == 0.4.0
termcolor == 2.3.0
wrapt == 1.16.0
tblib == 2.0.0
ml_dtypes >= 0.5.4, < 0.6.0
auditwheel >= 6.1.0

* `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`.

* `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`).