Python models.DBSession类代码示例

class EditModel(RestView):
    """
    A view that allows models to be edited.  Takes the class name as a
    string parameter and returns the correct html form.
    """
    def __init__(self, request):
        self.request = request
        self.session = DBSession()
        self.cls = self.look_up_class()
        self.instance = self.look_up_instance()
        self.breadcrumbs = breadcrumbs[:]
        self.breadcrumbs.append({'text': 'Edit %s' % self.instance})

    def get(self):
        fs = FieldSet(self.instance)
        return {'fs': fs,
                'breadcrumbs': self.breadcrumbs[:],
                'instance': self.instance,
                'cls': self.cls}

    def post(self):
        fs = FieldSet(self.instance,
                      data=self.request.POST)
        if fs.validate():
            fs.sync()
            self.session.flush()
            return HTTPFound(location=fs.model.getUrl())

 def update_tokens(self):
     """
     We need to record these updates to token states and provide a
     way to view this in the Gateway Interface.
     """
     session = DBSession()
     data = simplejson.loads(self.request.body)
     if not 'device_id' in data:
         return json_response('You must provide an device_id')
     device = session.query(Device)\
         .filter_by(device_id=data['device_id']).first()
     if device:
         for i in data['tokens']:
             token = session.query(Token)\
                 .filter_by(token=i['token_id']).first()
             if token:
                 circuit = session.query(Circuit)\
                     .filter_by(pin=i['account_id']).first()
                 if circuit:
                     job = AddCredit(token.value, circuit, token)
                     session.add(job)
                 token.state = 'used'
                 session.merge(token)
         session.flush()
         return json_response('ok')
     else:
         return json_response('You must provide a valid device_id')

 def make_tokens(self):
     session = DBSession()
     batch = TokenBatch()
     session.add(batch)
     session.flush()
     data = simplejson.loads(self.request.body)
     if not 'device_id' in data:
         return Response('You must provide an device_id')
     else:
         device = session.query(Device)\
             .filter_by(device_id=data['device_id']).first()
         if device:
             if not 'tokens' in data:
                 return Response('You must provide an amount of tokens')
             for group in data['tokens']:
                 for i in range(0, group['count']):
                     token = Token(Token.get_random(),
                                   batch=batch,
                                   value=group['denomination'])
                     session.add(token)
                     session.flush()
             return json_response(
                 [{'token_id': int(token.token),
                   'denomination':
                   float(token.value)} for token in batch.getTokens()])
         else:
             return json_response('Not a valid device')

 def login(self):
     session = DBSession()
     came_from = self.request.params.get('came_from', '/')
     message = ''
     login = ''
     password = ''
     if 'form.submitted' in self.request.params:
         name = self.request.params['name']
         hash = hashlib.md5(self.request.params['password']).hexdigest()
         user = session.query(Users)\
             .filter_by(name=name)\
             .filter_by(password=unicode(hash)).first()
         if user:
             print(name, hash)
             headers = remember(self.request, user.name)
             return HTTPFound(
                 location="%s" % came_from,
                 headers=headers)
         message = 'Failed login'
     return {
         'message': message,
         'url': self.request.application_url + '/login',
         'came_from': came_from,
         'login': login,
         'password': password}

class MessageHandler(object):
    def __init__(self, request):
        self.session = DBSession()
        self.request = request
        self.message = self.session.\
                       query(Message).filter_by(
            uuid=self.request.matchdict["id"]).first()

    @action(renderer='sms/index_msg.mako')
    def index(self):
        global breadcrumbs
        breadcrumbs.extend({})
        return {
            'breadcrumbs': breadcrumbs,
            'message': self.message }

    @action(request_method="POST")
    def remove(self):
        self.message.sent = True
        self.session.merge(self.message)
        return Response("ok")

    @action(renderer='sms/delete_msg.mako')
    def delete(self):
        if self.request.method == 'POST':
            return Response("Removed Message")
        elif self.request.method == 'GET':
            return {'message': self.message }

class AddClass(RestView):
    """
    An genertic view that allows for adding models to our system.
    """
    def __init__(self, request):
        self.request = request
        self.session = DBSession()
        self.cls = self.look_up_class()
        self.breadcrumbs = breadcrumbs[:]
        self.breadcrumbs\
            .append({'text': 'Add a new %s' % self.cls.__name__})

    def get(self):
        fs = FieldSet(self.cls, session=self.session)
        return {
            'breadcrumbs': self.breadcrumbs,
            'fs': fs, 'cls': self.cls}

    def post(self):
        fs = FieldSet(self.cls, session=self.session).\
             bind(self.cls(), data=self.request.POST)
        if fs.validate():
            fs.sync()
            self.session.flush()
            return HTTPFound(location=fs.model.getUrl())
        else:
            return {'fs': fs, 'cls': self.cls}

 def send(self):
     session = DBSession()
     twilio = session.query(TwilioInterface).first()
     msg = save_and_parse_message(twilio,
                                  self.request.params['From'],
                                  self.request.params['Body'],
                                  id=self.request.params['SmsMessageSid'])
     return Response(msg.uuid)

class SMSHandler(object):
    """
    Handler for most SMS operations
    """
    def __init__(self, request):
        self.request = request
        self.breadcrumbs = breadcrumbs[:]
        self.session = DBSession()

    @action(renderer="sms/index.mako", permission="view")
    def index(self):
        breadcrumbs = self.breadcrumbs[:]
        breadcrumbs.append({"text": "SMS Message"})
        limit = self.request.params.get('limit', 1000)
        count = self.session.query(Message).count()
        messages = self.session.\
            query(Message).order_by(desc(Message.id)).limit(limit)
        return {
            "limit": limit,
            "count": count,
            "messages": messages,
            "table_headers": make_table_header(OutgoingMessage),
            "breadcrumbs": breadcrumbs}

    @action(renderer='sms/meter_messages.mako', permission='view')
    def meter_messages(self):
        from sqlalchemy import create_engine
        db_string = self.request.registry.settings.get('db_string')
        engine = create_engine(db_string, echo=False)
        conn = engine.connect()
        results = conn.execute(
"""
SELECT meter.name, meter.id, incoming_message.text, message.date
       FROM meter, message, incoming_message
       WHERE meter.phone = message.number
       AND message.id = incoming_message.id ORDER BY message.date DESC LIMIT 1000;
""")
        return {'results': results}

    @action(permission="view")
    def remove_all(self):
        [self.session.delete(msg) for msg in self.session.query(Message).all()]
        return HTTPFound(
            location="%s/sms/index" % self.request.application_url)

    @action()
    def ping(self):
        return Response('ok')

    @action()
    def received(self):
        msgs = [msg.toDict() for msg in self.session.query(Message).\
                filter_by(sent=False).filter(or_(Message.type == "job_message",
                  Message.type == "outgoing_message")).all()
                  if msg.number != '']
        return Response(
            content_type="application/json",
            body=simplejson.dumps(msgs))

def findMeter(message):
    """
    Takes a message object and returns either a meter or none.
    Looks up the meter based on the message's number.
    """
    session = DBSession()
    meter = session.query(Meter).filter_by(phone=str(message.number)).first()
    if meter:
        return meter

def groupfinder(userid, request):
    """
    Rough cut of user admin system.
    """
    session = DBSession()
    user = session.query(Users).filter_by(name=userid).first()
    if user:
        if user.group:
            return [user.group.name]

 def job(self):
     session = DBSession()
     job = session.query(Job).get(self.request.matchdict["id"])
     if self.request.method == "DELETE":
         job.state = False
         job.end = datetime.now()
         session.merge(job)
         return Response(str(job))
     else:
         return Response(simplejson.dumps(job.toDict()))

def save_and_parse_message(interface, origin, text, id=None):
    """
    """
    session = DBSession()
    if id is None:
        id = str(uuid.uuid4())
    message = IncomingMessage(origin, text, id, interface)
    session.add(message)
    session.flush()
    dispatcher.matchMessage(message)
    return message

def findCircuit(message, meter):
    """Looks up circuit from meter and message.
    """
    session = DBSession()
    try:
        circuit = session.query(Circuit).\
            filter_by(ip_address=message["cid"]).\
            filter_by(meter=meter).first()
        if circuit:
            return circuit
    except Exception as e:
        print e, message

def get_token(message):
    """Tries to match message to token."""
    session = DBSession()
    tokenNumber = message.text.split(delimiter)[2]
    token = session.query(Token).filter_by(state="new").filter_by(token=tokenNumber).first()
    if token:
        return token
    else:
        interface = message.communication_interface
        interface.sendMessage(
            message.number, make_message_body("no-token.txt", lang=message.langauge), incoming=message.uuid
        )
        return False

 def show_pculogs(self):
     session = DBSession()
     value = self.request.params.get('pcu-value', 'battery_volts')
     start = datetime.strptime(
         self.request.params.get('start', '05/01/2011'), '%m/%d/%Y')
     end = datetime.strptime(
         self.request.params.get('end', '07/20/2011'), '%m/%d/%Y')
     pculogs = session.query(PCULog)\
         .filter(PCULog.meter == self.meter)\
         .filter(PCULog.timestamp >= start)\
         .filter(PCULog.timestamp <= end)
     return json_response(
         {'dates': map(lambda x: time.mktime(x.timestamp.timetuple()), pculogs),
          'values': map(lambda x: getattr(x, value), pculogs)})