It is clear as day to me, as written here: Setting time_expire=0 (or a negative value) forces the cached item to be refreshed (because the elapsed time since the last save will always be > 0), and setting time_expire=None forces retrieval of the cached value, regardless of the time elapsed since it was saved (if time_expire is always None, the cached item will effectively never expire).
On Tuesday, February 18, 2014 2:05:39 PM UTC-7, Richard wrote: > > @Derek > > I read that, what still bug me and seems not explicited (and may be cause > of my lack of knowledge), is what happen if there is already an instance > that use the cache.ram object at the same time I set time_expire to Zero or > even worse, if I delete the variable... > > Richard > > > On Tue, Feb 18, 2014 at 4:02 PM, Richard Vézina > <[email protected]<javascript:> > > wrote: > >> Wait! >> >> I made a mistake... It seems to be solve... Should be the pointer... My >> last error was here (in red): >> >> if form.process().accepts: >> del(globals()['cached_dict']) >> return_cached_dict(900) >> >> Should be 0 >> >> Also move the del in my factory : >> >> def return_cached_dict(update_cached_dict_if_elapsed_time=900): >> del(globals()['cached_dict']) >> global cached_dict >> cached_dict = cache.ram('cached_dict', >> lambda: {r[0]: r[1] for r in >> db.executesql("""SQL Query >> """) >> }, >> time_expire=update_cached_dict >> _if_elapsed_time) >> >> Then : >> >> if form.process().accepts: >> return_cached_dict(0) >> >> >> Richard >> >> >> >> On Tue, Feb 18, 2014 at 3:53 PM, Derek <[email protected] <javascript:>>wrote: >> >>> 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] <javascript:>. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >> >> > -- 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. 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