# A top level field has to be a single field, not multiple
    if len(body_param_names_set) > 1:
        return True
    first_field = fields[0]
    # If it explicitly specifies it is embedded, it has to be embedded
    if getattr(first_field.field_info, "embed", None):
        return True
    # If it's a Form (or File) field, it has to be a BaseModel (or a union of BaseModels) to be top level

    assert response.json() == [
        {"item_id": "i1", "user_id": "u1"},
        {"item_id": "i2", "user_id": "u2"},
    ]


def test_get_items_2():
    """Check that /items returns expected data with user_id specified"""
    response = client.get("/items?user_id=abc123")
    assert response.status_code == 200, response.text
    assert response.json() == [{"item_id": "i2", "user_id": "abc123"}]


def test_get_item_1():

                """
                The reason to close the WebSocket connection.

                It is UTF-8-encoded data. The interpretation of the reason is up to the
                application, it is not specified by the WebSocket specification.

                It could contain text that could be human-readable or interpretable
                by the client code, etc.
                """
            ),
        ] = None,

### Fixes

* 🐛 Fix bug preventing to use OpenAPI when using tuples. PR [#3874](https://github.com/tiangolo/fastapi/pull/3874) by [@victorbenichoux](https://github.com/victorbenichoux).
* 🐛 Prefer custom encoder over defaults if specified in `jsonable_encoder`. PR [#2061](https://github.com/tiangolo/fastapi/pull/2061) by [@viveksunder](https://github.com/viveksunder).