Question

OK, I allready have read all questions about class method decorating, but my case not like them.

def safe_db(foo):
    def _inner(*args, **kwargs):
        try:
            foo(args, kwargs)
            return True
        except Exception as e:
            log.error(e.message)
            print e.message
            return False
    return _inner


class BaseDB(object):
    def __init__(self):
        self.connection = Connection()
        self.db = self.connection.goobi
        self.table = None

    @safe_db
    def create(self, **data):
        self.table.insert(data)

    def update(self, where, **data):
        try:
            self.table.update(where, {'$set': data})
            return True
        except Exception as e:
           log.error(e.message)
           print e.message
           return False

And then I try call method create from inherited class User:

u = User()
u.create(email='[e-mail]', password='secrete')

I get exception:

2012-09-08 18:17:18,230 ERROR [hairs.model.user][worker 2] create() takes exactly 1      argument (2 given)
    create() takes exactly 1 argument (2 given)

I cant understand how I can decorate class methods of BaseDB, or how I can make exceptions catch and logging less painfull ?

Answer 1

You have an error in your decorator:

def safe_db(foo):
    def _inner(*args, **kwargs):
        try:
            foo(*args, **kwargs)   # fixed line
            return True
        except Exception as e:
            log.error(e.message)
            print e.message
            return False
    return _inner