work on relations docs

docs_src/relations/docs003.py

@@ -0,0 +1,44 @@
+import databases
+import sqlalchemy
+import orm
+
+database = databases.Database("sqlite:///db.sqlite")
+metadata = sqlalchemy.MetaData()
+
+
+class SchoolClass(orm.Model):
+    __tablename__ = "schoolclasses"
+    __metadata__ = metadata
+    __database__ = database
+
+    id = orm.Integer(primary_key=True)
+    name = orm.String(length=100)
+
+
+class Category(orm.Model):
+    __tablename__ = "categories"
+    __metadata__ = metadata
+    __database__ = database
+
+    id = orm.Integer(primary_key=True)
+    name = orm.String(length=100)
+
+
+class Student(orm.Model):
+    __metadata__ = metadata
+    __database__ = database
+
+    id = orm.Integer(primary_key=True)
+    name = orm.String(length=100)
+    schoolclass = orm.ForeignKey(SchoolClass)
+    category = orm.ForeignKey(Category)
+
+
+class Teacher(orm.Model):
+    __metadata__ = metadata
+    __database__ = database
+
+    id = orm.Integer(primary_key=True)
+    name = orm.String(length=100)
+    schoolclass = orm.ForeignKey(SchoolClass)
+    category = orm.ForeignKey(Category)