Maybe you can use:
cache.ram.clear('init')
after executing arbitrary_function()
On Tue, May 5, 2015 at 3:56 AM, A36_Marty <[email protected]> wrote:
> Likewise, I too am confused by Massimo's suggestion of using:
>
> if cache.ram('init',lambda:db(db.auth_user).isempty(),None):
> arbitrary_function()
>
>
> The True value indicating auth_user is empty is stored in the cache.ram
> 'init' value, then never updated. In my test code, 'arbitary_function'
> gets executed every time a page is loaded (since True for .isempty() is
> cached), even after records are added to auth_user....
>
> It's only after I stop web2py, restart (and the new value is stored in
> cache.ram 'init' does the function stop being executed.
>
> How can setting a cache.ram value then setting the expiration of the value
> to None / never expire every work?
>
>
>
>
>
> On Monday, March 31, 2014 at 2:57:00 PM UTC-5, Jay Martin wrote:
>>
>> I'm confused as to why this scenario needs caching.
>>
>> Isn't it true that for an empty user table:
>>
>> if cache.ram('init',lambda:db(db.auth_user).isempty(),None):
>> arbitrary_function()
>>
>> will only cache the boolean value True and keep that value (True) in
>> cache forever (until the app is restarted), associated with the given key
>> 'init'?
>>
>> Therefore, only this initial state is remembered. All future executions
>> of this code will only ever return this initial value (True), therefore the
>> subsequent arbitrary function will continue to be executed every cycle of
>> execution.
>>
>> Am I missing something? Many thanks!
>>
>>
>>
>> On Friday, August 10, 2012 11:23:56 PM UTC-4, Massimo Di Pierro wrote:
>>>
>>> you stil want to cache that
>>>
>>> if cache.ram('init',lambda:db(db.mytable).isempty(),None):
>>>
>>>
>>> --
> 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)
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--
Massimiliano
--
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)
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