That's great Andrew.
BTW great to see that Anthony is helping - he is someone who really knows
the nuts and bolts of web2py!
On Friday, 17 July 2020 08:05:40 UTC+1, Andrew Rogers wrote:
>
> Thanks for your response Villas. My reason for this approach is that i
> have a lot of code that expects a table object and i am trying to avoid
> having to modify it to handle the a different format.
>
> Anthony on Stack Exchange found my error. He said:
> "You probably also set DAL(..., lazy_tables=True), in which
> case, db.define_table() returns None rather than a Table object, as the
> table is not actually created until first accessed via db.tablename.
>
> Given your code, there is no benefit to setting lazy_tables=True, as all
> tables are accessed (and therefore created) immediately after definition
> anyway."
>
> On Thursday, 16 July 2020 at 03:43:40 UTC+10 villas wrote:
>
>> You don't mention...
>>
>> - Which DB adapter you are using
>> - Why just one of your tables is expected to be an in-memory table
>> and the others not
>> - Why you don't simply maintain the list of tables in a list(), or
>> dict() or some other in-memory structure
>>
>> In any case, maybe this idea might help...
>>
>> db = DAL("sqlite://storage.sqlite") # or whichever DB you are using
>> dbmemo = DAL("sqlite:memory")
>>
>> dbmemo.define_table('DatabaseModel', Field('TableName'))
>>
>> for t in db.tables:
>> dbmemo.DatabaseModel.update_or_insert(TableName=t)
>>
>>
>> On Wednesday, 15 July 2020 07:45:36 UTC+1, Andrew Rogers wrote:
>>>
>>> This code working fine but now it fails because the db.define_table()
>>> returns None.
>>>
>>> table = db.define_table('DatabaseModel', Field('TableName')) # This is
>>> not working now
>>> for t in db.tables:
>>> table.update_or_insert(TableName=t)
>>>
>>> The only thing that I think I have changed that might have affected it
>>> was setting migrate = false in appconfig.ini. I have changed it back
>>> but to no avail.
>>>
>>> What could stop db.define_table from returning a table?
>>>
>>> (I am using this to create an in-memory table which I populate with a
>>> list of actual tables.)
>>>
>>> Thanks.
>>>
>>> PS:
>>> https://stackoverflow.com/questions/62908908/under-what-circumstances-would-db-define-table-return-none
>>>
>>
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