However, they are now deprecated as you will now get better performance by using a [Response Model - Return Type](https://fastapi.tiangolo.com/tutorial/response-model/).

That way, Pydantic will serialize the data into JSON bytes on the Rust side, which will achieve better performance than these custom JSON responses.

* [`pydantic-extra-types`](https://docs.pydantic.dev/latest/usage/types/extra_types/extra_types/) - 用于在 Pydantic 中使用的额外类型。

额外的 FastAPI 可选依赖：

* [`orjson`](https://github.com/ijl/orjson) - 使用 `ORJSONResponse` 时需要。
* [`ujson`](https://github.com/esnme/ultrajson) - 使用 `UJSONResponse` 时需要。

## 许可协议 { #license }

        response = client.get("/items")
    assert response.status_code == 200
    assert response.json() == {"name": "widget", "price": 9.99}


def test_orjson_response_emits_deprecation_warning():
    with pytest.warns(FastAPIDeprecationWarning, match="ORJSONResponse is deprecated"):
        ORJSONResponse(content={"hello": "world"})


# UJSON


def _make_ujson_app() -> FastAPI:
    with warnings.catch_warnings():

    void emptyAcceptedApiChanges(File jsonFile) {
        jsonFile.withWriter { fileWriter ->
            def writer = new JsonWriter(fileWriter)
            writer.setIndent("    ")
            new Gson().toJson([acceptedApiChanges: []], Object, writer)
            writer.close()
        }
    }

        default: 'false'

jobs:
  job:
    runs-on: ubuntu-latest
    permissions:
      discussions: write
    steps:
      - name: Dump GitHub context
        env:
          GITHUB_CONTEXT: ${{ toJson(github) }}
        run: echo "$GITHUB_CONTEXT"
      - uses: actions/checkout@v6
      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version-file: ".python-version"

jobs:
  job:
    if: github.repository_owner == 'fastapi'
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Dump GitHub context
        env:
          GITHUB_CONTEXT: ${{ toJson(github) }}
        run: echo "$GITHUB_CONTEXT"
      - uses: actions/checkout@v6
      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version-file: ".python-version"

    types: [completed]

permissions:
  statuses: write

jobs:
  smokeshow:
    runs-on: ubuntu-latest

    steps:
      - name: Dump GitHub context
        env:
          GITHUB_CONTEXT: ${{ toJson(github) }}
        run: echo "$GITHUB_CONTEXT"
      - uses: actions/checkout@v6
      - uses: actions/setup-python@v6
        with:
          python-version-file: ".python-version"
      - name: Setup uv

    @TaskAction
    fun execute() {
        val gson: Gson = GsonBuilder().setFormattingStyle(FormattingStyle.PRETTY.withIndent("    ")).create()
        loadChanges().mapValues {
            gson.toJson(AcceptedApiChanges(sortChanges(it.value)))
        }.forEach {
            it.key.bufferedWriter().use { out ->
                out.write(it.value)
                out.write("\n")
            }
        }
    }

{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "extends": [
    "config:recommended",
    "group:monorepos",
    "group:recommended",
    ":dependencyDashboard"
  ],
  "semanticCommits": "disabled",
  "labels": [
    "renovate"
  ],
  "ignoreDeps": [
    "com.squareup.okhttp3:okhttp",
    "com.squareup.okhttp3:okhttp-tls",
    "com.squareup.okhttp3:mockwebserver"
  ],
  "packageRules": [
    {

        final String json = coordinatorHelper.toJson(map);
        assertNotNull(json);
        assertTrue(json.contains("\"type\":\"heartbeat\""));
        assertTrue(json.contains("\"instanceId\":\"test-instance\""));
        assertTrue(json.contains("\"createdTime\":1000"));
    }

    @Test
    public void test_toJson_emptyMap() {
        final String json = coordinatorHelper.toJson(Map.of());