pattern_import_export: allow to reference fk with multiple cols

pattern_import_export/models/ir_fields.py

@@ -127,7 +127,30 @@ def _str_to_many2many(self, model, field, value):
     def _str_to_many2one(self, model, field, value):
         if isinstance(value, dict):
             # odoo expect a list with one item
-            value = [value]
+            if len(value) == 1:
+                one_value = [value]
+                return super()._str_to_many2one(model, field, one_value)
+            else:
+                domain = model._convert_value_to_domain(None, value)
+                tosearch = field._related_comodel_name
+                record = self.env[tosearch].search(domain)
+                if len(record) > 1:
+                    # TODO improve here
+                    raise self._format_import_error(
+                        ValueError,
+                        _("%s Too many records found for %s in field '%s'"),
+                        (_(record._description), domain, tosearch),
+                    )
+                if len(record) == 0:
+                    raise self._format_import_error(
+                        ValueError,
+                        _("%s No matching record found for %s in field '%s'"),
+                        (_(record._description), domain, tosearch),
+                    )
+
+                # call core function to be sure not to miss something
+                an_id, donotcare, w2 = self.db_id_for(model, field, ".id", record.id)
+                return an_id, [] + w2
         return super()._str_to_many2one(model, field, value)
 
     @api.model