add sqlalchemy as orm tool

gui/database/comic.py

@@ -0,0 +1,40 @@
+from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Integer, String
+from sqlalchemy.dialects.mysql import BIT
+from sqlalchemy.orm import relationship
+
+from database.base import Base
+
+
+class Publisher(Base):
+    __tablename__ = "publisher"
+    id = Column(String, primary_key=True)
+    created_date = Column(DateTime)
+    last_modified_date = Column(DateTime)
+    version = Column(Integer)
+    name = Column(String(length=255))
+    comics = relationship("Comic")
+
+    def __repr__(self):
+        return f'Publisher({self.id} {self.name})'
+
+    def __str__(self):
+        return self.__repr__()
+
+
+class Comic(Base):
+    __tablename__ = 'comic'
+    id = Column(String, primary_key=True)
+    created_date = Column(DateTime)
+    last_modified_date = Column(DateTime)
+    version = Column(Integer)
+    title = Column(String(length=255))
+    publisher_id = Column(String, ForeignKey('publisher.id'))
+    publisher = relationship("Publisher", back_populates="comics")
+    current_order = Column(BIT(1))
+    completed = Column(BIT(1))
+
+    def __repr__(self):
+        return f'Comic({self.id} {self.version} {self.title} {self.publisher.name})'
+
+    def __str__(self):
+        return f'{self.title}({self.id})'