added simplistic dictionary_auth example (#105)

demo/database_auth/db.py

@@ -0,0 +1,34 @@
+import sqlalchemy as sa
+
+
+metadata = sa.MetaData()
+
+
+users = sa.Table(
+    'users', metadata,
+    sa.Column('id', sa.Integer, nullable=False),
+    sa.Column('login', sa.String(256), nullable=False),
+    sa.Column('passwd', sa.String(256), nullable=False),
+    sa.Column('is_superuser', sa.Boolean, nullable=False,
+              server_default='FALSE'),
+    sa.Column('disabled', sa.Boolean, nullable=False,
+              server_default='FALSE'),
+
+    # indices
+    sa.PrimaryKeyConstraint('id', name='user_pkey'),
+    sa.UniqueConstraint('login', name='user_login_key'),
+)
+
+
+permissions = sa.Table(
+    'permissions', metadata,
+    sa.Column('id', sa.Integer, nullable=False),
+    sa.Column('user_id', sa.Integer, nullable=False),
+    sa.Column('perm_name', sa.String(64), nullable=False),
+
+    # indices
+    sa.PrimaryKeyConstraint('id', name='permission_pkey'),
+    sa.ForeignKeyConstraint(['user_id'], [users.c.id],
+                            name='user_permission_fkey',
+                            ondelete='CASCADE'),
+)