Answer is yes it work just fine...
db(db.ref_colorimeter_color.filter_parameter.belongs(['delta_a',
'delta_a_b'])).select(db.ref_colorimeter_color.color,
orderby="substring(color, '\(([^\)]+)\)')")
But with this :
db.ref_colorimeter_color.color.regexp('\(([^\)]+)\)')
It doesn't seems to work as DAL translate it into :
SELECT ref_colorimeter_color.color
FROM ref_colorimeter_color
WHERE (ref_colorimeter_color.filter_parameter IN ('delta_a_b','delta_a'))
ORDER BY (ref_colorimeter_color.color ~ '\(([^\)]+)\)');
Which don't seems to help in sorting record... I try to understand why
regexp get translated that way :
https://github.com/web2py/pydal/blob/e1136b6e29e4dbeb878cf9718c053aa790d909b5/pydal/dialects/postgre.py#L78
I am not sure the rational of :
order by field_name ~ regexp
I can find anything in postgres documentation as far as my search goes...
Richard
On Fri, Jul 8, 2016 at 1:04 PM, Richard <ml.richard.vez...@gmail.com> wrote:
> Can we do that :
>
>
> http://stackoverflow.com/questions/8989098/postgres-order-data-by-part-of-string
>
> ?
>
> Maybe like this ?
>
> orderby='substring(tablename.fieldname, ...)'
>
> ??
>
> Thanks
>
> Richard
>
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