So it caching selects to disk or redis supposed to only work if you have
uniquely named fields? It doesn't seem to make a difference if I set
cachable=True or not.
On Tuesday, April 3, 2018 at 5:15:25 PM UTC-5, Brian M wrote:
>
> Further investigation shows that cache.redis plays nicely with pyodbc *as
> long as you have all uniquely named fields in your select*. The selects
> that I was working with involved multiple tables that each had a "Name"
> field that was being selected. If I add .with_alias() to provide unique
> names then caching worked but that's also not really convenient. Is this
> the way it is supposed to work?
>
> On Tuesday, April 3, 2018 at 2:16:30 PM UTC-5, Anthony wrote:
>>
>> You can also see what happens if you do not set cacheable=True.
>>
>> On Tuesday, April 3, 2018 at 3:15:55 PM UTC-4, Anthony wrote:
>>>
>>> It should work. Could be a bug specific to using pyodbc. Have you tried
>>> it with other databases/drivers? Feel free to file a PyDAL issue.
>>>
>>> Anthony
>>>
>>> On Tuesday, April 3, 2018 at 12:40:50 PM UTC-4, Brian M wrote:
>>>>
>>>> I've been playing with caching and looking through the mailing list and
>>>> have a bit of confusion about whether or not you can actually cache DAL
>>>> Selects with anything other than cache.ram due to issues with what
>>>> can/cannot be pickled. When I use
>>>>
>>>> db(...).select(...,cache=(cache.disk, 300), cacheable=True)
>>>>
>>>> Caching works just fine. But if I try it with cache.disk or cache.redis
>>>> instead then I get errors which seem to be related to not being able to
>>>> unpickle the cached select results.
>>>>
>>>> type 'exceptions.TypeError'> ("cannot create 'pyodbc.Row' instances",
>>>> <type 'pyodbc.Row'>, ....)
>>>>
>>>>
>>>> This, admittedly old, post seems to suggest that cache.redis should be
>>>> pretty much drop-in for cache.ram but that's not my experience.
>>>> https://groups.google.com/forum/?fromgroups#!searchin/web2py/caching$20model$20data/web2py/Tn4TiLPScII/jtMR1KtT4V8J
>>>>
>>>>
>>>> So does the ability to cache DAL Selects really only exist for
>>>> cache.ram or am I missing something?
>>>>
>>>>
>>>> Brian
>>>>
>>>
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