### What problem does this PR solve? Python class Document was missing "meta_fields", e.g. when querying, the document instances came without meta_fields ### Type of change - [x] Bug Fix (non-breaking change which fixes an issue)tags/v0.20.2
| self.process_duration = 0.0 | self.process_duration = 0.0 | ||||
| self.run = "0" | self.run = "0" | ||||
| self.status = "1" | self.status = "1" | ||||
| self.meta_fields = {} | |||||
| for k in list(res_dict.keys()): | for k in list(res_dict.keys()): | ||||
| if k not in self.__dict__: | if k not in self.__dict__: | ||||
| res_dict.pop(k) | res_dict.pop(k) |