Inconsistant behavior when using partial schema

[TheBigRoomXXL]

I have an API made with flask-smorest with to following endpoint :

@blp.route('/')
class BinRessource(MethodView):
  @blp.arguments(PartialBinSchema , location="querystring")
  @blp.response(200, BinSchema(many=True))
  def get(self, filters):
    """List bins"""
    return Bin.auth_query(**filters)
  
  @blp.arguments(BinSchema(many=True))
  @blp.response(201, BinSchema(many=True))
  def post(self, new_bin_list):
    """Add a list of new bin"""
    list_bins = [Bin(**new_bin) for new_bin in new_bin_list]
    db.session.add_all(list_bins)
    db.session.commit()
    return list_bins


class PartialBinSchema(BinSchema):
  class Meta:
    partial=True

The generated schema is invalid because the fields are still required (see the red *):

I can fix that by replacing PartialBinSchema with BinSchema(partial=True) which give me the following result:

That way the generated schema is valid but the name is not as clear and trigger a warning because there is two schemas resolving to the name Bin.

Regardless of the naming problem I would expect (partial=True) and class Meta: partial=True to generate the same schema.

[Jérôme Lafréchoux]

I just checked, you can't pass partial as meta param in marshmallow.

PartialBinSchema is the same as BinSchema since partial in Meta is ignored.

This might be a feature request for marshmallow but not an issue in apispec.