✨ Add QUERY HTTP method support to FastAPI

Introduce a new custom HTTP method called QUERY for structured query operations. Features: - Full integration with FastAPI routing system - Available on both FastAPI and APIRouter classes - Complete parity with existing HTTP methods - OpenAPI documentation support - Response model validation - Parameter dependency injection - 9 passing tests Examples: @app.query("/search") def search(q: str, limit: int = 10): return {"results": [], "query": q} # Call with: client.request("QUERY", "/search?q=python")
2 weeks ago · 94bde339dd
3 changed files with 671 additions and 0 deletions
--- a/fastapi/applications.py
+++ b/fastapi/applications.py
@ -4636,6 +4636,246 @@ class FastAPI(Starlette):
            generate_unique_id_function=generate_unique_id_function,
        )
    def query(
        self,
        path: Annotated[
            str,
            Doc(
                """
                The URL path to be used for this *path operation*.
                """
            ),
        ],
        *,
        response_model: Annotated[
            Any,
            Doc(
                """
                The type to use for the response.
                """
            ),
        ] = Default(None),
        status_code: Annotated[
            int | None,
            Doc(
                """
                The default status code to be used for the response.
                """
            ),
        ] = None,
        tags: Annotated[
            list[str | Enum] | None,
            Doc(
                """
                A list of tags to be applied to the *path operation*.
                """
            ),
        ] = None,
        dependencies: Annotated[
            Sequence[params.Depends] | None,
            Doc(
                """
                A list of dependencies (using `Depends()`) to be applied to the
                *path operation*.
                """
            ),
        ] = None,
        summary: Annotated[
            str | None,
            Doc(
                """
                A summary for the *path operation*.
                """
            ),
        ] = None,
        description: Annotated[
            str | None,
            Doc(
                """
                A description for the *path operation*.
                """
            ),
        ] = None,
        response_description: Annotated[
            str,
            Doc(
                """
                The description for the default response.
                """
            ),
        ] = "Successful Response",
        responses: Annotated[
            dict[int | str, dict[str, Any]] | None,
            Doc(
                """
                Additional responses that could be returned by this *path operation*.
                """
            ),
        ] = None,
        deprecated: Annotated[
            bool | None,
            Doc(
                """
                Mark this *path operation* as deprecated.
                """
            ),
        ] = None,
        operation_id: Annotated[
            str | None,
            Doc(
                """
                Custom operation ID to be used by this *path operation*.
                """
            ),
        ] = None,
        response_model_include: Annotated[
            IncEx | None,
            Doc(
                """
                Configuration passed to Pydantic to include only certain fields in the
                response data.
                """
            ),
        ] = None,
        response_model_exclude: Annotated[
            IncEx | None,
            Doc(
                """
                Configuration passed to Pydantic to exclude certain fields in the
                response data.
                """
            ),
        ] = None,
        response_model_by_alias: Annotated[
            bool,
            Doc(
                """
                Configuration passed to Pydantic to define if the response model
                should be serialized by alias when an alias is used.
                """
            ),
        ] = True,
        response_model_exclude_unset: Annotated[
            bool,
            Doc(
                """
                Configuration passed to Pydantic to define if the response model
                should exclude fields that were not explicitly set.
                """
            ),
        ] = False,
        response_model_exclude_defaults: Annotated[
            bool,
            Doc(
                """
                Configuration passed to Pydantic to define if the response model
                should exclude fields that are set to their default value.
                """
            ),
        ] = False,
        response_model_exclude_none: Annotated[
            bool,
            Doc(
                """
                Configuration passed to Pydantic to define if the response model
                should exclude fields set to `None`.
                """
            ),
        ] = False,
        include_in_schema: Annotated[
            bool,
            Doc(
                """
                By default, this *path operation* is included in the generated OpenAPI
                schema.
                """
            ),
        ] = True,
        response_class: Annotated[
            type[Response],
            Doc(
                """
                Response class to use for this *path operation*.
                """
            ),
        ] = Default(JSONResponse),
        name: Annotated[
            str | None,
            Doc(
                """
                The name for this *path operation*. Only used internally, by FastAPI.
                """
            ),
        ] = None,
        callbacks: Annotated[
            list[BaseRoute] | None,
            Doc(
                """
                OpenAPI callbacks that should be triggered by this *path operation*.
                """
            ),
        ] = None,
        openapi_extra: Annotated[
            dict[str, Any] | None,
            Doc(
                """
                Extra metadata to be added to the OpenAPI schema for this *path
                operation*.
                """
            ),
        ] = None,
        generate_unique_id_function: Annotated[
            Callable[[APIRoute], str],
            Doc(
                """
                A callable to generate a unique ID for this *path operation*.
                """
            ),
        ] = Default(generate_unique_id),
    ) -> Callable[[DecoratedCallable], DecoratedCallable]:
        """
        Add a *path operation* using an HTTP QUERY operation.
        QUERY is a custom HTTP method for structured query operations.
        ## Example
        ```python
        from fastapi import FastAPI
        app = FastAPI()
        @app.query("/search")
        def search_items(q: str):
            return [{"name": "Item " + q}]
        ```
        """
        return self.router.query(
            path,
            response_model=response_model,
            status_code=status_code,
            tags=tags,
            dependencies=dependencies,
            summary=summary,
            description=description,
            response_description=response_description,
            responses=responses,
            deprecated=deprecated,
            operation_id=operation_id,
            response_model_include=response_model_include,
            response_model_exclude=response_model_exclude,
            response_model_by_alias=response_model_by_alias,
            response_model_exclude_unset=response_model_exclude_unset,
            response_model_exclude_defaults=response_model_exclude_defaults,
            response_model_exclude_none=response_model_exclude_none,
            include_in_schema=include_in_schema,
            response_class=response_class,
            name=name,
            callbacks=callbacks,
            openapi_extra=openapi_extra,
            generate_unique_id_function=generate_unique_id_function,
        )
    def websocket_route(
        self, path: str, name: str | None = None
    ) -> Callable[[DecoratedCallable], DecoratedCallable]:
--- a/fastapi/routing.py
+++ b/fastapi/routing.py
@ -6309,6 +6309,252 @@ class APIRouter(routing.Router):
            generate_unique_id_function=generate_unique_id_function,
        )
    def query(
        self,
        path: Annotated[
            str,
            Doc(
                """
                The URL path to be used for this *path operation*.
                For example, in `http://example.com/search`, the path is `/search`.
                """
            ),
        ],
        *,
        response_model: Annotated[
            Any,
            Doc(
                """
                The type to use for the response.
                """
            ),
        ] = Default(None),
        status_code: Annotated[
            int | None,
            Doc(
                """
                The default status code to be used for the response.
                """
            ),
        ] = None,
        tags: Annotated[
            list[str | Enum] | None,
            Doc(
                """
                A list of tags to be applied to the *path operation*.
                """
            ),
        ] = None,
        dependencies: Annotated[
            Sequence[params.Depends] | None,
            Doc(
                """
                A list of dependencies (using `Depends()`) to be applied to the
                *path operation*.
                """
            ),
        ] = None,
        summary: Annotated[
            str | None,
            Doc(
                """
                A summary for the *path operation*.
                """
            ),
        ] = None,
        description: Annotated[
            str | None,
            Doc(
                """
                A description for the *path operation*.
                """
            ),
        ] = None,
        response_description: Annotated[
            str,
            Doc(
                """
                The description for the default response.
                """
            ),
        ] = "Successful Response",
        responses: Annotated[
            dict[int | str, dict[str, Any]] | None,
            Doc(
                """
                Additional responses that could be returned by this *path operation*.
                """
            ),
        ] = None,
        deprecated: Annotated[
            bool | None,
            Doc(
                """
                Mark this *path operation* as deprecated.
                """
            ),
        ] = None,
        operation_id: Annotated[
            str | None,
            Doc(
                """
                Custom operation ID to be used by this *path operation*.
                """
            ),
        ] = None,
        response_model_include: Annotated[
            IncEx | None,
            Doc(
                """
                Configuration passed to Pydantic to include only certain fields in the
                response data.
                """
            ),
        ] = None,
        response_model_exclude: Annotated[
            IncEx | None,
            Doc(
                """
                Configuration passed to Pydantic to exclude certain fields in the
                response data.
                """
            ),
        ] = None,
        response_model_by_alias: Annotated[
            bool,
            Doc(
                """
                Configuration passed to Pydantic to define if the response model
                should be serialized by alias when an alias is used.
                """
            ),
        ] = True,
        response_model_exclude_unset: Annotated[
            bool,
            Doc(
                """
                Configuration passed to Pydantic to define if the response model
                should exclude fields that were not explicitly set.
                """
            ),
        ] = False,
        response_model_exclude_defaults: Annotated[
            bool,
            Doc(
                """
                Configuration passed to Pydantic to define if the response model
                should exclude fields that are set to their default value.
                """
            ),
        ] = False,
        response_model_exclude_none: Annotated[
            bool,
            Doc(
                """
                Configuration passed to Pydantic to define if the response model
                should exclude fields set to `None`.
                """
            ),
        ] = False,
        include_in_schema: Annotated[
            bool,
            Doc(
                """
                By default, this *path operation* is included in the generated OpenAPI
                schema.
                """
            ),
        ] = True,
        response_class: Annotated[
            type[Response],
            Doc(
                """
                Response class to use for this *path operation*.
                """
            ),
        ] = Default(JSONResponse),
        name: Annotated[
            str | None,
            Doc(
                """
                The name for this *path operation*. Only used internally, by FastAPI.
                """
            ),
        ] = None,
        callbacks: Annotated[
            list[BaseRoute] | None,
            Doc(
                """
                OpenAPI callbacks that should be triggered by this *path operation*.
                """
            ),
        ] = None,
        openapi_extra: Annotated[
            dict[str, Any] | None,
            Doc(
                """
                Extra metadata to be added to the OpenAPI schema for this *path
                operation*.
                """
            ),
        ] = None,
        generate_unique_id_function: Annotated[
            Callable[[APIRoute], str],
            Doc(
                """
                A callable to generate a unique ID for this *path operation*.
                """
            ),
        ] = Default(generate_unique_id),
    ) -> Callable[[DecoratedCallable], DecoratedCallable]:
        """
        Add a *path operation* using an HTTP QUERY operation.
        QUERY is a custom HTTP method for structured query operations.
        ## Example
        ```python
        from fastapi import APIRouter, FastAPI
        app = FastAPI()
        router = APIRouter()
        @router.query("/search")
        def search_items(q: str):
            return [{"name": "Item " + q}]
        app.include_router(router)
        ```
        """
        return self.api_route(
            path=path,
            response_model=response_model,
            status_code=status_code,
            tags=tags,
            dependencies=dependencies,
            summary=summary,
            description=description,
            response_description=response_description,
            responses=responses,
            deprecated=deprecated,
            methods=["QUERY"],
            operation_id=operation_id,
            response_model_include=response_model_include,
            response_model_exclude=response_model_exclude,
            response_model_by_alias=response_model_by_alias,
            response_model_exclude_unset=response_model_exclude_unset,
            response_model_exclude_defaults=response_model_exclude_defaults,
            response_model_exclude_none=response_model_exclude_none,
            include_in_schema=include_in_schema,
            response_class=response_class,
            name=name,
            callbacks=callbacks,
            openapi_extra=openapi_extra,
            generate_unique_id_function=generate_unique_id_function,
        )
    # TODO: remove this once the lifespan (or alternative) interface is improved
    async def _startup(self) -> None:
        """
--- a/tests/test_query_http_method.py
+++ b/tests/test_query_http_method.py
@ -0,0 +1,185 @@
 """
 Tests for the QUERY HTTP method in FastAPI.
 The QUERY method is a custom HTTP method designed for structured query operations.
 """
 import pytest
 from fastapi import APIRouter, FastAPI
 from starlette.testclient import TestClient
 class TestQueryHttpMethod:
    """Tests for the QUERY HTTP method."""
    @pytest.fixture
    def app(self):
        """Create a test FastAPI application."""
        app = FastAPI()
        @app.query("/search")
        def search(q: str, limit: int = 10):
            """Simple search endpoint using QUERY method."""
            return {
                "query": q,
                "limit": limit,
                "items": [{"id": 1, "name": f"Result for {q}"}],
            }
        return app
    def test_query_method_basic(self, app):
        """Test basic QUERY method request."""
        client = TestClient(app)
        response = client.request("QUERY", "/search?q=python")
        assert response.status_code == 200
        data = response.json()
        assert data["query"] == "python"
        assert data["limit"] == 10
    def test_query_method_with_params(self, app):
        """Test QUERY method with multiple parameters."""
        client = TestClient(app)
        response = client.request("QUERY", "/search?q=fastapi&limit=20")
        assert response.status_code == 200
        data = response.json()
        assert data["query"] == "fastapi"
        assert data["limit"] == 20
    def test_query_method_default_params(self, app):
        """Test QUERY method uses default parameter values."""
        client = TestClient(app)
        response = client.request("QUERY", "/search?q=default")
        assert response.status_code == 200
        data = response.json()
        assert data["limit"] == 10
    @pytest.fixture
    def router_app(self):
        """Test QUERY method with APIRouter."""
        app = FastAPI()
        router = APIRouter()
        @router.query("/items/search")
        def search_items(name: str, skip: int = 0):
            """Search for items."""
            return {
                "search_term": name,
                "skip": skip,
                "found_items": [{"id": 1, "name": name}],
            }
        app.include_router(router)
        return app
    def test_query_method_with_router(self, router_app):
        """Test QUERY method with APIRouter."""
        client = TestClient(router_app)
        response = client.request("QUERY", "/items/search?name=widget&skip=5")
        assert response.status_code == 200
        data = response.json()
        assert data["search_term"] == "widget"
        assert data["skip"] == 5
    @pytest.fixture
    def tagged_app(self):
        """Test QUERY method with tags and metadata."""
        app = FastAPI()
        @app.query(
            "/search",
            tags=["search"],
            summary="Search endpoint",
            description="Search for items using QUERY method",
        )
        def search(q: str):
            return {"query": q, "results": []}
        return app
    def test_query_method_with_tags(self, tagged_app):
        """Test QUERY method request succeeds."""
        client = TestClient(tagged_app)
        response = client.request("QUERY", "/search?q=tagged")
        assert response.status_code == 200
        assert response.json()["query"] == "tagged"
    def test_query_method_openapi_documentation(self, tagged_app):
        """Test that QUERY method appears in OpenAPI documentation."""
        client = TestClient(tagged_app)
        response = client.get("/openapi.json")
        assert response.status_code == 200
        openapi = response.json()
        assert "/search" in openapi["paths"]
    @pytest.fixture
    def multiple_query_methods(self):
        """Test multiple QUERY endpoints."""
        app = FastAPI()
        @app.query("/users/search")
        def search_users(name: str):
            return {"type": "users", "query": name}
        @app.query("/posts/search")
        def search_posts(title: str):
            return {"type": "posts", "query": title}
        return app
    def test_multiple_query_endpoints(self, multiple_query_methods):
        """Test multiple QUERY method endpoints."""
        client = TestClient(multiple_query_methods)
        # Test first endpoint
        response1 = client.request("QUERY", "/users/search?name=alice")
        assert response1.status_code == 200
        assert response1.json()["type"] == "users"
        # Test second endpoint
        response2 = client.request("QUERY", "/posts/search?title=hello")
        assert response2.status_code == 200
        assert response2.json()["type"] == "posts"
 class TestQueryMethodIntegration:
    """Test integration with FastAPI features."""
    @pytest.fixture
    def featured_app(self):
        """App with various FastAPI features."""
        app = FastAPI()
        @app.query("/search", status_code=200, deprecated=False)
        def search(q: str, limit: int = 10):
            """Search endpoint with custom config."""
            return {"q": q, "limit": limit}
        @app.get("/items")
        def list_items():
            """GET endpoint for comparison."""
            return {"items": []}
        return app
    def test_query_and_get_coexist(self, featured_app):
        """Test that QUERY and GET methods can coexist."""
        client = TestClient(featured_app)
        # GET should work
        get_response = client.get("/items")
        assert get_response.status_code == 200
        # QUERY should also work
        query_response = client.request("QUERY", "/search?q=test")
        assert query_response.status_code == 200
    def test_query_method_with_status_code(self, featured_app):
        """Test QUERY method respects status_code parameter."""
        client = TestClient(featured_app)
        response = client.request("QUERY", "/search?q=test")
        assert response.status_code == 200
 if __name__ == "__main__":
    pytest.main([__file__, "-v"])