我正在尝试使用自定义响应类作为默认响应。
from fastapi.responses import Response
from bson.json_util import dumps
class MongoResponse(Response):
def __init__(self, content, *args, **kwargs):
super().__init__(
content=dumps(content),
media_type="application/json",
*args,
**kwargs,
)
当我显式地使用响应类时,这可以很好地工作。
@app.get("/")
async def getDoc():
foo = client.get_database('foo')
result = await foo.bar.find_one({'author': 'fool'})
return MongoResponse(result)
然而,当我尝试将其作为参数传递给FastAPI构造函数时,似乎在仅从请求处理程序返回数据时没有使用它。
app = FastAPI(default_response_class=MongoResponse)
@app.get("/")
async def getDoc():
foo = client.get_database('foo')
result = await foo.bar.find_one({'author': 'fool'})
return result
当我看到下面的堆栈跟踪时,它似乎仍然使用正常的默认响应,即json响应。
ERROR: Exception in ASGI application
Traceback (most recent call last):
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/uvicorn/protocols/http/httptools_impl.py", line 390, in run_asgi
result = await app(self.scope, self.receive, self.send)
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/uvicorn/middleware/proxy_headers.py", line 45, in __call__
return await self.app(scope, receive, send)
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/fastapi/applications.py", line 181, in __call__
await super().__call__(scope, receive, send) # pragma: no cover
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/starlette/applications.py", line 111, in __call__
await self.middleware_stack(scope, receive, send)
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/starlette/middleware/errors.py", line 181, in __call__
raise exc from None
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/starlette/middleware/errors.py", line 159, in __call__
await self.app(scope, receive, _send)
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/starlette/exceptions.py", line 82, in __call__
raise exc from None
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/starlette/exceptions.py", line 71, in __call__
await self.app(scope, receive, sender)
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/starlette/routing.py", line 566, in __call__
await route.handle(scope, receive, send)
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/starlette/routing.py", line 227, in handle
await self.app(scope, receive, send)
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/starlette/routing.py", line 41, in app
response = await func(request)
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/fastapi/routing.py", line 199, in app
is_coroutine=is_coroutine,
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/fastapi/routing.py", line 122, in serialize_response
return jsonable_encoder(response_content)
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/fastapi/encoders.py", line 94, in jsonable_encoder
sqlalchemy_safe=sqlalchemy_safe,
File "/home/blue/podman/test/.venv/lib/python3.6/site-packages/fastapi/encoders.py", line 139, in jsonable_encoder
raise ValueError(errors)
ValueError: [TypeError("'ObjectId' object is not iterable",), TypeError('vars() argument must have __dict__ attribute',)]
2条答案
按热度按时间dsekswqp1#
因此,默认的响应类和路由上的响应类只在开放API文档中存在,默认情况下,文档会记录每个端点,就好像它们会返回json一样。
因此,对于下面的示例代码,每个响应都将被标记为内容类型text/html。
从这个意义上说,我可能应该显式地使用我的类,并将默认响应类保留为JSON,以便将它们记录为JSON响应。
qojgxg4l2#
我求助于monkeypatching