Sending attachments from disk

[neki-tamo]

Hi,

I was wondering if anyone could possibly help me with this. I am trying to send attachment from disk (not form an Uploaded File). If I try this, the api returns error

instance of UploadFile expected (type=type_error.arbitrary_type; expected_arbitrary_type=UploadFile)

As you can see, i was trying to simply pass a file in a list of attachments. This is the offending code:

with open(attachment,"r") as attach:
message = MessageSchema(
      subject="Fastapi-Mail module",
      recipients=["some.valid@email"],  # List of recipients, as many as you can pass 
      body=content,
      attachments=[attach],
      subtype="plain"
      )

fm = FastMail(conf)
await (fm.send_message (message))

the full error trace is:

Traceback (most recent call last):
  File "/path.../env/lib/python3.8/site-packages/uvicorn/protocols/http/httptools_impl.py", line 376, in run_asgi
    result = await app(self.scope, self.receive, self.send)
  File "/path.../env/lib/python3.8/site-packages/uvicorn/middleware/proxy_headers.py", line 75, in __call__
    return await self.app(scope, receive, send)
  File "/path.../env/lib/python3.8/site-packages/fastapi/applications.py", line 208, in __call__
    await super().__call__(scope, receive, send)
  File "/path.../env/lib/python3.8/site-packages/starlette/applications.py", line 112, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/path.../env/lib/python3.8/site-packages/starlette/middleware/errors.py", line 181, in __call__
    raise exc
  File "/path.../env/lib/python3.8/site-packages/starlette/middleware/errors.py", line 159, in __call__
    await self.app(scope, receive, _send)
  File "/path.../env/lib/python3.8/site-packages/starlette/exceptions.py", line 82, in __call__
    raise exc
  File "/path.../env/lib/python3.8/site-packages/starlette/exceptions.py", line 71, in __call__
    await self.app(scope, receive, sender)
  File "/path.../env/lib/python3.8/site-packages/starlette/routing.py", line 656, in __call__
    await route.handle(scope, receive, send)
  File "/path.../env/lib/python3.8/site-packages/starlette/routing.py", line 259, in handle
    await self.app(scope, receive, send)
  File "/path.../env/lib/python3.8/site-packages/starlette/routing.py", line 64, in app
    await response(scope, receive, send)
  File "/path.../env/lib/python3.8/site-packages/starlette/responses.py", line 142, in __call__
    await self.background()
  File "/path.../env/lib/python3.8/site-packages/starlette/background.py", line 35, in __call__
    await task()
  File "/path.../env/lib/python3.8/site-packages/starlette/background.py", line 18, in __call__
    await self.func(*self.args, **self.kwargs)
  File "/path..././main.py", line 74, in my_app
    await (simple_send(responmse.stdout, str(compressed)))
  File "/path..././main.py", line 42, in simple_send
    message = MessageSchema(
  File "pydantic/main.py", line 331, in pydantic.main.BaseModel.__init__
pydantic.error_wrappers.ValidationError: 3 validation errors for MessageSchema
attachments -> 0
  instance of UploadFile expected (type=type_error.arbitrary_type; expected_arbitrary_type=UploadFile)
attachments -> 0
  value is not a valid dict (type=type_error.dict)
attachments -> 0
  str type expected (type=type_error.str)```

[timombre]

I have a very similar issue, I am trying to attach a file coming from an azure blob storage, my first step was trying to attach a local file and I got stuck. I even tried to instantiate SpooledTemporaryFile()

tf = tempfile.SpooledTemporaryFile()
tf.write(blob.download_blob().readall())
tf.seek(0)
up = UploadFile(filename=upload.blob_name.split("/")[-1], content_type="application/pdf", file=tf)

the following prints give the exact same results
print(up.dict)
print(up.file)
print(await up.read())

as
print(file.dict)
print(file.file)
print(await file.read())
from the file example when posting the same file downloaded from the blob

It is extremely frustrating to debug as the error goes completely silent, you just receive an email without any attachment