How to pass array to form data (multipart/form-data) #903
Description
I need to call API using multipart/form-data with list of strings and list of objects
data = aiohttp.FormData()
data.add_field("emails", candidate["email"], content_type="multipart/form-data")
data.add_field("phones[]", [{"value": phone}], content_type="multipart/form-data")
If I'm not mistaken FormData is designed to support urlencoded params or bytes for files only. Passing anything other than bytes results in ClientRequestError: Can not write request body. Is there a better way that passing everything as files?
What is more the
data.add_field("emails[]", bytes(candidate["email"], "ascii"), content_type="multipart/form-data")
results in emails%5B%5D and form data doesn't allow bytes as names
elif isinstance(value, (bytes, bytearray, memoryview)):
if filename is None and content_transfer_encoding is None:
filename = name
type_options = multidict.MultiDict({'name': name})
if filename is not None and not isinstance(filename, str):
raise TypeError('filename must be an instance of str. '
'Got: %s' % filename)