* Tell me how you use FastAPI (I love to hear that).
    * Hear when I make announcements or release new tools.
    * You can also <a href="https://twitter.com/fastapi" class="external-link" target="_blank">follow @fastapi on Twitter</a> (a separate account).
* <a href="https://www.linkedin.com/in/tiangolo/" class="external-link" target="_blank">Follow me on **LinkedIn**</a>.

```

</div>

**SANGAT disarankan** agar kamu menulis atau menyalin kode, mengubahnya dan menjalankannya secara lokal.

Dengan menggunakannya di dalam editor, benar-benar memperlihatkan manfaat dari FastAPI, melihat bagaimana sedikitnya kode yang harus kamu tulis, semua pengecekan tipe, pelengkapan otomatis, dll.

---

## Install FastAPI

    with pytest.raises(ValidationError):
        ModelWithAlias(foo="Bar")


def test_encode_model_with_alias():
    model = ModelWithAlias(Foo="Bar")
    assert jsonable_encoder(model) == {"Foo": "Bar"}


def test_encode_model_with_default():
    model = ModelWithDefault(foo="foo", bar="bar")
    assert jsonable_encoder(model) == {"foo": "foo", "bar": "bar", "bla": "bla"}

        ("/default?foo=bar", 200, {"foo": "bar"}),
        ("/required?foo=bar", 200, {"foo": "bar"}),
        ("/required", 422, foo_is_missing),
        ("/required?foo=", 422, foo_is_short),
        ("/multiple?foo=bar", 200, {"foo": "bar"}),
        ("/multiple", 422, foo_is_missing),
        ("/multiple?foo=", 422, foo_is_short),
        ("/unrelated?foo=bar", 200, {"foo": "bar"}),
        ("/unrelated", 422, foo_is_missing),

    if query is None:
        return "foo bar"
    return f"foo bar {query}"


@app.get("/query/int/default")
def get_query_type_int_default(query: int = 10):
    return f"foo bar {query}"


@app.get("/query/param")
def get_query_param(query=Query(default=None)):
    if query is None:
        return "foo bar"
    return f"foo bar {query}"


@app.get("/query/param-required")

            "description": None,
            "tax": None,
        },
        "q": "bar",
    }


@needs_py310
def test_post_no_body_q_bar(client: TestClient):
    response = client.put("/items/5?q=bar", json=None)
    assert response.status_code == 200
    assert response.json() == {"item_id": 5, "q": "bar"}


@needs_py310
def test_post_no_body(client: TestClient):

            "item": {
                "name": "Bar",
                "price": 0.2,
                "description": "Some bar",
                "tax": "5.4",
            }
        },
    )
    assert response.status_code == 200
    assert response.json() == {
        "item_id": 6,
        "item": {
            "name": "Bar",
            "price": 0.2,
            "description": "Some bar",
            "tax": 5.4,
        },

    assert response.json() == {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}


@needs_py39
def test_query_params_str_validations_item_query_fixedquery(client: TestClient):
    response = client.get("/items/", params={"item-query": "fixedquery"})
    assert response.status_code == 200
    assert response.json() == {
        "items": [{"item_id": "Foo"}, {"item_id": "Bar"}],
        "q": "fixedquery",
    }


@needs_py39

app = FastAPI()


@app.get("/items/")
async def read_items(
    q: Annotated[str | None, Query(title="Query string", min_length=3)] = None,
):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})

app = FastAPI()


@app.get("/items/")
async def read_items(
    q: Annotated[Union[str, None], Query(title="Query string", min_length=3)] = None,
):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})