fix: FastAPI 0.112.3 compatibility (#1763)

* fix: FastAPI 0.112.3 compatibility

* chore: bump FastAPI

* lint: fix mypy for latests FastAPI

* chore: bump version

faststream/__about__.py

@@ -1,5 +1,5 @@
 """Simple and fast framework to create message brokers based microservices."""
 
-__version__ = "0.5.20"
+__version__ = "0.5.21"
 
 SERVICE_NAME = f"faststream-{__version__}"

faststream/_compat.py

@@ -2,14 +2,13 @@
 import os
 import sys
 from importlib.metadata import version as get_version
-from typing import Any, Callable, Dict, List, Mapping, Optional, Type, TypeVar, Union
+from typing import Any, Callable, Dict, Mapping, Optional, Type, TypeVar, Union
 
 from fast_depends._compat import PYDANTIC_V2 as PYDANTIC_V2
 from fast_depends._compat import (  # type: ignore[attr-defined]
     PYDANTIC_VERSION as PYDANTIC_VERSION,
 )
 from pydantic import BaseModel as BaseModel
-from typing_extensions import Never
 
 from faststream.types import AnyDict
 
@@ -21,9 +20,6 @@
 ModelVar = TypeVar("ModelVar", bound=BaseModel)
 
 
-IS_OPTIMIZED = os.getenv("PYTHONOPTIMIZE", False)
-
-
 def is_test_env() -> bool:
     return bool(os.getenv("PYTEST_CURRENT_TEST"))
 
@@ -59,34 +55,6 @@ def json_dumps(*a: Any, **kw: Any) -> bytes:
         return json.dumps(*a, **kw).encode()
 
 
-try:
-    from fastapi import __version__ as FASTAPI_VERSION  # noqa: N812
-
-    major, minor, *_ = map(int, FASTAPI_VERSION.split("."))
-    FASTAPI_V2 = major > 0 or minor > 100
-    FASTAPI_V106 = major > 0 or minor >= 106
-
-    if FASTAPI_V2:
-        from fastapi._compat import _normalize_errors
-        from fastapi.exceptions import RequestValidationError
-
-        def raise_fastapi_validation_error(errors: List[Any], body: AnyDict) -> Never:
-            raise RequestValidationError(_normalize_errors(errors), body=body)
-
-    else:
-        from pydantic import (  # type: ignore[assignment]  # isort: skip
-            ValidationError as RequestValidationError,
-        )
-        from pydantic import create_model
-
-        ROUTER_VALIDATION_ERROR_MODEL = create_model("StreamRoute")
-
-        def raise_fastapi_validation_error(errors: List[Any], body: AnyDict) -> Never:
-            raise RequestValidationError(errors, ROUTER_VALIDATION_ERROR_MODEL)  # type: ignore[misc]
-
-except ImportError:
-    pass
-
 JsonSchemaValue = Mapping[str, Any]
 
 if PYDANTIC_V2:

faststream/broker/fastapi/_compat.py

@@ -0,0 +1,115 @@
+from dataclasses import dataclass
+from typing import TYPE_CHECKING, Any, List, Optional
+
+from fastapi import __version__ as FASTAPI_VERSION  # noqa: N812
+from fastapi.dependencies.utils import solve_dependencies
+from starlette.background import BackgroundTasks
+from typing_extensions import Never
+
+from faststream.types import AnyDict
+
+if TYPE_CHECKING:
+    from fastapi.dependencies.models import Dependant
+    from fastapi.requests import Request
+
+major, minor, patch, *_ = map(int, FASTAPI_VERSION.split("."))
+FASTAPI_V2 = major > 0 or minor > 100
+FASTAPI_V106 = major > 0 or minor >= 106
+FASTAPI_v102_3 = major > 0 or minor > 112 or (minor == 112 and patch > 2)
+
+__all__ = (
+    "create_response_field",
+    "solve_faststream_dependency",
+    "raise_fastapi_validation_error",
+    "RequestValidationError",
+)
+
+
+@dataclass
+class SolvedDependency:
+    values: AnyDict
+    errors: List[Any]
+    background_tasks: Optional[BackgroundTasks]
+
+
+if FASTAPI_V2:
+    from fastapi._compat import _normalize_errors
+    from fastapi.exceptions import RequestValidationError
+
+    def raise_fastapi_validation_error(errors: List[Any], body: AnyDict) -> Never:
+        raise RequestValidationError(_normalize_errors(errors), body=body)
+
+else:
+    from pydantic import (  # type: ignore[assignment]
+        ValidationError as RequestValidationError,
+    )
+    from pydantic import create_model
+
+    ROUTER_VALIDATION_ERROR_MODEL = create_model("StreamRoute")
+
+    def raise_fastapi_validation_error(errors: List[Any], body: AnyDict) -> Never:
+        raise RequestValidationError(errors, ROUTER_VALIDATION_ERROR_MODEL)  # type: ignore[misc]
+
+
+if FASTAPI_v102_3:
+    from fastapi.utils import (
+        create_model_field as create_response_field,
+    )
+
+    async def solve_faststream_dependency(
+        request: "Request",
+        dependant: "Dependant",
+        dependency_overrides_provider: Optional[Any],
+        **kwargs: Any,
+    ) -> SolvedDependency:
+        solved_result = await solve_dependencies(
+            request=request,
+            body=request._body,  # type: ignore[arg-type]
+            dependant=dependant,
+            dependency_overrides_provider=dependency_overrides_provider,
+            **kwargs,
+        )
+        values, errors, background = (
+            solved_result.values,
+            solved_result.errors,
+            solved_result.background_tasks,
+        )
+
+        return SolvedDependency(
+            values=values,
+            errors=errors,
+            background_tasks=background,
+        )
+
+else:
+    from fastapi.utils import (  # type: ignore[attr-defined,no-redef]
+        create_response_field as create_response_field,
+    )
+
+    async def solve_faststream_dependency(
+        request: "Request",
+        dependant: "Dependant",
+        dependency_overrides_provider: Optional[Any],
+        **kwargs: Any,
+    ) -> SolvedDependency:
+        solved_result = await solve_dependencies(
+            request=request,
+            body=request._body,  # type: ignore[arg-type]
+            dependant=dependant,
+            dependency_overrides_provider=dependency_overrides_provider,
+            **kwargs,
+        )
+
+        (
+            values,
+            errors,
+            background,
+            _response,
+            _dependency_cache,
+        ) = solved_result  # type: ignore[misc]
+
+        return SolvedDependency(
+            values=values,  # type: ignore[has-type]
+            errors=errors,  # type: ignore[has-type]
+            background_tasks=background,  # type: ignore[has-type]
+        )

faststream/broker/fastapi/route.py

@@ -14,15 +14,19 @@
     Union,
 )
 
-from fastapi.dependencies.utils import solve_dependencies
 from fastapi.routing import run_endpoint_function, serialize_response
-from fastapi.utils import create_response_field
 from starlette.requests import Request
 
-from faststream._compat import FASTAPI_V106, raise_fastapi_validation_error
 from faststream.broker.fastapi.get_dependant import get_fastapi_native_dependant
 from faststream.broker.types import P_HandlerParams, T_HandlerReturn
 
+from ._compat import (
+    FASTAPI_V106,
+    create_response_field,
+    raise_fastapi_validation_error,
+    solve_faststream_dependency,
+)
+
 if TYPE_CHECKING:
     from fastapi import params
     from fastapi._compat import ModelField
@@ -199,28 +203,21 @@ async def app(
                 request.scope["fastapi_astack"] = stack
                 kwargs = {}
 
-            solved_result = await solve_dependencies(
+            solved_result = await solve_faststream_dependency(
                 request=request,
-                body=request._body,  # type: ignore[arg-type]
                 dependant=dependent,
                 dependency_overrides_provider=provider_factory(),
-                **kwargs,  # type: ignore[arg-type]
+                **kwargs,
             )
 
-            (
-                values,
-                errors,
-                raw_message.background,  # type: ignore[attr-defined]
-                _response,
-                _dependency_cache,
-            ) = solved_result
+            raw_message.background = solved_result.background_tasks  # type: ignore[attr-defined]
 
-            if errors:
-                raise_fastapi_validation_error(errors, request._body)  # type: ignore[arg-type]
+            if solved_result.errors:
+                raise_fastapi_validation_error(solved_result.errors, request._body)  # type: ignore[arg-type]
 
             raw_reponse = await run_endpoint_function(
                 dependant=dependent,
-                values=values,
+                values=solved_result.values,
                 is_coroutine=is_coroutine,
             )
 

pyproject.toml

@@ -128,7 +128,7 @@ test-core = [
 
 testing = [
     "faststream[test-core]",
-    "fastapi==0.112.2",
+    "fastapi==0.112.3",
     "pydantic-settings>=2.0.0,<3.0.0",
     "httpx==0.27.2",
     "PyYAML==6.0.2",