_pickle.PicklingError encountered when attempting to serialize `BaseDoc` type about docarray HOT 4 CLOSED

This is the same problem as seen in Pydantic here pydantic/pydantic#4178

from docarray.

So, a solution is to declare it with module parameter:

from docarray.documents.helper import create_doc
import pickle


MyDoc = create_doc(
    'MyDoc',
    __module__=__name__,
    title=(str, ...)
)

buffer = pickle.dumps(MyDoc)

This works for me

from docarray.

Hello @beidongjiedeguang,

May I ask what are you trying to do here? Here you are pickling a class, is it the intended behavior?

from docarray.

Hi @JoanFM ,
Yes, because this type is dynamically created. If it is not saved, it will need to be recreated the next time DocIndex(such as HnswDocumentIndex) is launched. Therefore, I must save the metadata for creating this class. So if possible, I would like to directly save this type.

from docarray.