initial sqlalchemy-2.0 support

Makefile

@@ -45,7 +45,7 @@ endif
 
 tests:
 	# Run pytest with coverage
-	@$(VENV_RUN)pytest --cov=. tests
+	@SQLALCHEMY_WARN_20=1 $(VENV_RUN)pytest --cov=. tests
 
 .PHONY: lint tests
 

docker-compose.yml

@@ -1,12 +1,14 @@
-version: '3'
+version: "3"
 
 volumes:
   pg_data:
 
 services:
   postgres:
-    image: postgres:9.6.3
+    image: postgres:latest
     ports:
       - 5543:5432
     volumes:
       - pg_data:/var/lib/postgresql/data
+    environment:
+      POSTGRES_PASSWORD: postgres

requirements.txt

@@ -1,3 +1,3 @@
-psycopg2==2.8.3
-six==1.12.0
-sqlalchemy==1.3.7
+psycopg2==2.9.9
+six==1.16.0
+sqlalchemy==1.4.51

setup.py

@@ -2,7 +2,7 @@
 
 from setuptools import find_packages, setup
 
-install_requires = ["psycopg2>=2.7", "six>=1.12.0", "SQLAlchemy>=1.0"]
+install_requires = ["psycopg2>=2.7", "six>=1.12.0", "SQLAlchemy>=1.4"]
 test_requires = ["pytest", "pytest-cov", "pytest-mock"]
 dev_requires = test_requires + [
     "autopep8>=1.4.4",
@@ -30,6 +30,8 @@
 Programming Language :: Python :: 3
 Programming Language :: Python :: 3.6
 Programming Language :: Python :: 3.7
+Programming Language :: Python :: 3.8
+Programming Language :: Python :: 3.9
 Programming Language :: SQL
 Topic :: Database
 Topic :: Database :: Front-Ends

src/savage/models/__init__.py

@@ -16,7 +16,7 @@
     text,
 )
 from sqlalchemy.dialects import postgresql
-from sqlalchemy.ext.declarative import declared_attr
+from sqlalchemy.orm import declared_attr
 from sqlalchemy.orm.attributes import InstrumentedAttribute
 
 from savage import utils

tests/conftest.py

@@ -1,7 +1,7 @@
 from __future__ import absolute_import
 
 import pytest
-from sqlalchemy import create_engine
+from sqlalchemy import create_engine, text
 
 import savage
 from savage.utils import savage_json_serializer
@@ -41,7 +41,7 @@ def session(engine):
     # Clean up
     _session.close()
     for tablename in Base.metadata.tables.keys():
-        connection.execute("DELETE FROM {}".format(tablename))
+        connection.execute(text("DELETE FROM {}".format(tablename)))
     connection.close()
 
 

tests/models.py

@@ -14,7 +14,7 @@
     UniqueConstraint,
 )
 from sqlalchemy.dialects import postgresql
-from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import declarative_base
 
 from savage.models import SavageLogMixin, SavageModelMixin