Merge pull request #24 from collerek/change_pg_check-23

change postgresql check to dialect name

ormar/models/model.py

@@ -2,7 +2,6 @@ import itertools
 from typing import Any, Dict, List, Optional
 
 import sqlalchemy
-from databases.backends.postgres import Record
 
 import ormar.queryset  # noqa I100
 from ormar.fields.many_to_many import ManyToManyField
@@ -110,7 +109,7 @@ class Model(NewBaseModel):
     ) -> dict:
 
         # databases does not keep aliases in Record for postgres, change to raw row
-        source = row._row if isinstance(row, Record) else row
+        source = row._row if cls.db_backend_name() == "postgresql" else row
 
         selected_columns = cls.own_table_columns(
             cls, fields or [], nested=nested, use_alias=True

ormar/models/newbasemodel.py

@@ -166,6 +166,10 @@ class NewBaseModel(pydantic.BaseModel, ModelTableProxy, metaclass=ModelMetaclass
     def pk_type(cls) -> Any:
         return cls.Meta.model_fields[cls.Meta.pkname].__type__
 
+    @classmethod
+    def db_backend_name(cls) -> str:
+        return cls.Meta.database._backend._dialect.name
+
     def remove(self, name: "Model") -> None:
         self._orm.remove_parent(self, name)