* basic SQLAlchemy model

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

development.ini

@@ -33,6 +33,8 @@ beaker.session.secret = somesecret
 # execute malicious code after an exception is raised.
 #set debug = false
 
+sqlalchemy.url = sqlite:///%(here)s/gvaweb.sqlite
+
 
 # Logging configuration
 [loggers]

gnuviechadminweb/config/environment.py

@@ -7,6 +7,9 @@ import gnuviechadminweb.lib.app_globals as app_globals
 import gnuviechadminweb.lib.helpers
 from gnuviechadminweb.config.routing import make_map
 
+from sqlalchemy import engine_from_config
+from gnuviechadminweb.model import init_model
+
 def load_environment(global_conf, app_conf):
     """Configure the Pylons environment via the ``pylons.config``
     object
@@ -31,3 +34,5 @@ def load_environment(global_conf, app_conf):
 
     # CONFIGURATION OPTIONS HERE (note: all config options will override
     # any Pylons config options)
+    engine = engine_from_config(config, 'sqlalchemy.')
+    init_model(engine)

gnuviechadminweb/controllers/gva.py

@@ -6,7 +6,6 @@ from gnuviechadminweb.lib.base import *
 log = logging.getLogger(__name__)
 
 class GvaController(BaseController):
-
     def index(self):
         # Return a rendered template
         return render('/main.mako')

gnuviechadminweb/lib/base.py

@@ -12,15 +12,24 @@ from pylons.templating import render
 
 import gnuviechadminweb.lib.helpers as h
 import gnuviechadminweb.model as model
+from gnuviechadminweb.model import meta
 
 class BaseController(WSGIController):
 
     def __call__(self, environ, start_response):
         """Invoke the Controller"""
+        conn = meta.engine.connect()
+        meta.Session.configure(bind=conn)
+        c.menu = model.Menu.allowed(session['user'] if 'user' in session \
+                                        else None)
+        try:
             # WSGIController.__call__ dispatches to the Controller method
             # the request is routed to. This routing information is
             # available in environ['pylons.routes_dict']
             return WSGIController.__call__(self, environ, start_response)
+        finally:
+            meta.Session.remove()
+            conn.close()
 
 # Include the '_' function in the public names
 __all__ = [__name for __name in locals().keys() if not __name.startswith('_') \

gnuviechadminweb/lib/helpers.py

@@ -4,3 +4,11 @@ Consists of functions to typically be used within templates, but also
 available to Controllers. This module is available to both as 'h'.
 """
 from webhelpers import *
+
+def cssclasses(menuitem):
+    cssclassnames=['menuitem']
+    return " ".join(cssclassnames)
+
+def menulink(menuitem):
+    return link_to(menuitem.title, url(controller=menuitem.controller,
+                                       action=menuitem.action))

gnuviechadminweb/model/__init__.py

@@ -0,0 +1,15 @@
+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

@@ -0,0 +1,64 @@
+# -*- 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

@@ -0,0 +1,14 @@
+"""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()

gnuviechadminweb/websetup.py

@@ -5,6 +5,7 @@ from paste.deploy import appconfig
 from pylons import config
 
 from gnuviechadminweb.config.environment import load_environment
+from gnuviechadminweb.model import meta
 
 log = logging.getLogger(__name__)
 
@@ -12,3 +13,6 @@ def setup_config(command, filename, section, vars):
     """Place any commands to setup gnuviechadminweb here"""
     conf = appconfig('config:' + filename)
     load_environment(conf.global_conf, conf.local_conf)
+    log.info("Creating tables")
+    meta.metadata.create_all(bind=meta.engine)
+    log.info("Successfully setup")