* basic SQLAlchemy model

* menu handling code
 * SQLAlchemy setup in environent.py, base.py and websetup.py

gnuviechadminweb/model/__init__.py

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+import sqlalchemy as sa
+from sqlalchemy import orm
+
+from gnuviechadminweb.model import meta
+
+def init_model(engine):
+    """Call me before using any of the tables or classes in the model."""
+    
+    sm = orm.sessionmaker(autoflush=True, transactional=True, bind=engine)
+    
+    meta.engine = engine
+    meta.Session = orm.scoped_session(sm)
+
+from gnuviechadminweb.model import menu
+from gnuviechadminweb.model.menu import Menu, User, Role

gnuviechadminweb/model/menu.py

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+# -*- python -*-
+# -*- coding: utf-8 -*-
+import sqlalchemy as sa
+from sqlalchemy import orm
+
+from gnuviechadminweb.model import meta
+
+t_menu = \
+    sa.Table("menu", meta.metadata,
+             sa.Column("id", sa.types.Integer, primary_key=True),
+             sa.Column("title", sa.types.String(40), nullable=False),
+             sa.Column("controller", sa.types.String(40), nullable=False),
+             sa.Column("action", sa.types.String(40), nullable=False)
+             )
+
+t_user = \
+    sa.Table("user", meta.metadata,
+             sa.Column("id", sa.types.Integer, primary_key=True),
+             sa.Column("name", sa.types.String(40), nullable=False),
+             sa.Column("password", sa.types.String(128), nullable=False)
+             )
+
+t_role = \
+    sa.Table("role", meta.metadata,
+             sa.Column("id", sa.types.Integer, primary_key=True),
+             sa.Column("name", sa.types.String(40), nullable=False)
+             )
+
+t_menu_role = \
+    sa.Table("menu_role", meta.metadata,
+             sa.Column("id", sa.types.Integer, primary_key=True),
+             sa.Column("menu_id", sa.types.Integer, sa.ForeignKey(t_menu.c.id)),
+             sa.Column("role_id", sa.types.Integer, sa.ForeignKey(t_role.c.id))
+             )
+
+t_user_role = \
+    sa.Table("user_role", meta.metadata,
+             sa.Column("id", sa.types.Integer, primary_key=True),
+             sa.Column("user_id", sa.types.Integer, sa.ForeignKey(t_user.c.id)),
+             sa.Column("role_id", sa.types.Integer, sa.ForeignKey(t_role.c.id))
+             )         
+
+class Menu(object):
+  @classmethod
+  def allowed(cls, user=None):
+    menu_q = meta.Session.query(cls)
+    return menu_q.all()
+
+class User(object):
+  pass
+
+class Role(object):
+  pass
+
+orm.mapper(Menu, t_menu, {
+    'roles' : orm.relation(Role, secondary = t_menu_role),
+    })
+orm.mapper(Role, t_role, properties = {
+    'users' : orm.relation(User, secondary = t_user_role),
+    'menus' : orm.relation(Menu, secondary = t_menu_role),
+    })
+orm.mapper(User, t_role, properties = {
+    'roles' : orm.relation(User, secondary = t_user_role)
+    })

gnuviechadminweb/model/meta.py

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+"""SQLAlchemy Metadata and Session object"""
+from sqlalchemy import MetaData
+
+__all__ = ['engine', 'metadata', 'Session']
+
+# SQLAlchemy database engine.  Updated by model.init_model().
+engine = None
+
+# SQLAlchemy session manager.  Updated by model.init_model().
+Session = None
+
+# Global metadata. If you have multiple databases with overlapping table 
+# names, you'll need a metadata for each database.
+metadata = MetaData()