init

models.py

@@ -0,0 +1,14 @@
+from sqlalchemy import Column, Integer, String, UniqueConstraint
+from database import Base
+
+class Counter(Base):
+    __tablename__ = "counters"
+    id = Column(Integer, primary_key=True, index=True)
+    namespace = Column(String, index=True, nullable=False)
+    application = Column(String, index=True, nullable=False)
+    version = Column(String, index=True, nullable=False)
+    value = Column(Integer, default=0, nullable=False)
+
+    __table_args__ = (
+        UniqueConstraint('namespace', 'application', 'version', name='_namespace_application_version_uc'),
+    )