fix minimum sqlalchemy version in tests

.github/workflows/unit.yaml

@@ -40,7 +40,7 @@ jobs:
         include:
           # oldest python/sqlalchemy supported
           - python-version: "3.8"
-            sqlalchemy-version: "1.4"
+            sqlalchemy-version: "1.4.18"
     services:
       eralchemy-db:
         image: postgres:alpine

example/forum.py

@@ -17,11 +17,9 @@ from sqlalchemy import (
     Unicode,
     UnicodeText,
 )
-from sqlalchemy.orm import DeclarativeBase, Relationship
+from sqlalchemy.orm import Relationship, declarative_base
 
-
-class Base(DeclarativeBase):
-    pass
+Base = declarative_base()
 
 
 post_tags = Table(

example/graph.py

@@ -4,13 +4,11 @@
 from __future__ import annotations
 
 from sqlalchemy import ForeignKey, Integer
-from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
+from sqlalchemy.orm import Mapped, declarative_base, mapped_column, relationship
 
 from eralchemy import render_er
 
-
-class Base(DeclarativeBase):
-    pass
+Base = declarative_base()
 
 
 class Node(Base):

pyproject.toml

@@ -26,7 +26,7 @@ classifiers=[
 ]
 requires-python = ">=3.8"
 dependencies = [
-  "sqlalchemy >= 1.4"
+  "sqlalchemy >= 1.4.18"
 ]
 
 [project.urls]

tests/test_sqla_multi_key.py

 from sqlalchemy import Column, ForeignKey, String
-from sqlalchemy.orm import DeclarativeBase
+from sqlalchemy.orm import declarative_base
 
 from eralchemy.models import Relation, Table
 from eralchemy.sqla import (
@@ -8,8 +8,7 @@ from eralchemy.sqla import (
 
 
 def test_columns_parent():
-    class Base(DeclarativeBase):
-        pass
+    Base = declarative_base()
 
     class Parent(Base):
         __tablename__ = "parent"
@@ -32,8 +31,7 @@ def test_columns_parent():
 
 
 def test_columns_one_to_many_parent():
-    class Base(DeclarativeBase):
-        pass
+    Base = declarative_base()
 
     class Parent(Base):
         __tablename__ = "parent"
@@ -56,8 +54,7 @@ def test_columns_one_to_many_parent():
 
 
 def test_columns_one_to_one_parent():
-    class Base(DeclarativeBase):
-        pass
+    Base = declarative_base()
 
     class Parent(Base):
         __tablename__ = "parent"
@@ -79,8 +76,7 @@ def test_columns_one_to_one_parent():
 
 
 def test_compound_one_to_one_parent():
-    class Base(DeclarativeBase):
-        pass
+    Base = declarative_base()
 
     class Parent(Base):
         __tablename__ = "parent"