You are using the 'examples' to make your cache. That's good that you are following the examples, but you really should start by reading the book first.
http://web2py.com/book/default/chapter/04#cache It's explained here what's happening and what you can do to invalidate the cache and special cases. On Monday, February 17, 2014 1:41:29 PM UTC-7, Richard wrote: > > Hello, > > I have an issue with app design and global variable cached python dict... > > I use web2py 2.4.7 > > I use to create cached python dict in models like so : > > update_cached_dict_if_elapsed_time = 900 > cached_dict = cache.ram('cached_dict', > lambda: {r[0]: r[1] for r in > db.executesql("""...""")}, > > time_expire=update_cached_dict_if_elapsed_time) > > cached_dict is a for representation of a given table ids... It intent to > reduce the number of requests that hit the database by using python dict as > much as possible... > > But I got in trouble trying to update this dict with > update_cached_dictt_if_elapsed_time... First as cached_dict this variable > is in globals, so I use to add more logic around the > update_cached_dict_if_elapsed_time var like so : > > > update_cached_dict_if_elapsed_time = None > if update_cached_dict_if_elapsed_time == 0: > pass > elif request.args(0) == 'table_name' and request.function == 'create' and > request.post_vars: > update_cached_dict_if_elapsed_time = 0 > > I find this cumbersome and prone to error because if I have other thing > that should trigger a dict update, I have to add more logic... > > So, I though I could make factory dict function like so : > > def factory_cached_dict(update_cached_dict_if_elapsed_time=900): > global > cached_dict > cached_dict = cache.ram('cached_dict', > lambda: {r[0]: r[1] for r in > db.executesql("""...""")}, > > time_expire=update_cached_dict_if_elapsed_time) > > factory_cached_dict(900) > > Above is in models... > > Then I though I could just update my global cached_dict var from any > controller like so : > > if form.process().accepts: > factory_cached_dict(0) # Because in this form I just add a value to > the table use to create the python dict > > But I am really desapointed it not seems to work because I still > experiment issue with not up to date cached_dict because there is missing > key value pairs for id and it representation. > > I think the issue is that even if I call the factory after form submit the > dict get recreated at each request by the factory call in models or there > is something else going on that I don't understand (maybe issue with cache > in web2py in web2py 2.4.7??) > > Thanks for any help. > > Richard > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
