work on relations docs

docs_src/relations/docs001.py

@@ -0,0 +1,26 @@
+import orm
+import databases
+import sqlalchemy
+
+database = databases.Database("sqlite:///db.sqlite")
+metadata = sqlalchemy.MetaData()
+
+
+class Album(orm.Model):
+    __tablename__ = "album"
+    __metadata__ = metadata
+    __database__ = database
+
+    id = orm.Integer(primary_key=True)
+    name = orm.String(length=100)
+
+
+class Track(orm.Model):
+    __tablename__ = "track"
+    __metadata__ = metadata
+    __database__ = database
+
+    id = orm.Integer(primary_key=True)
+    album = orm.ForeignKey(Album)
+    title = orm.String(length=100)
+    position = orm.Integer()