fix bug

@@ -542,12 +542,23 @@ class Command(BaseCommand, LoggerMixin):
                         else:
                             sheet_name, key_field, side_field_order, field_order = self.field_map[result[self.CLASSIFY_KEY]]
                             if key_field is not None and key_field in result[self.RESULT_KEY]:
-                                head_fields = [a for a, _ in side_field_order]
+                                head_fields = []
+                                for a, b in side_field_order:
+                                    if isinstance(b, str):
+                                        head_fields.append(a)
                             else:
-                                head_fields = [a for a, _ in field_order]
+                                head_fields = []
+                                for a, b in side_field_order:
+                                    if isinstance(b, str):
+                                        head_fields.append(a)
                         row = []
                         for field in head_fields:
-                            row.append(result[self.RESULT_KEY].get(field))
+                            ocr_str_or_list = result[self.RESULT_KEY].get(field, '')
+                            if isinstance(ocr_str_or_list, list):
+                                last_ocr_str = '、'.join(ocr_str_or_list)
+                            else:
+                                last_ocr_str = ocr_str_or_list
+                            row.append(last_ocr_str)
                         if sheet_name in wb.sheetnames:
                             ws = wb.get_sheet_by_name(sheet_name)
                         else: