Help with expression..

[Sergey Pashkov]

Hello, Matteo

$F macro should be used only with template-style expressions, which do not
begin with '=' character.

So in your case you can write just a name of a field
=concat('NUMERO COLLI:', format(totaleColli,'#'), 'PESO KG: ',
format(peso,'#.##'), 'H', format(altezza,'#.##'), 'L',
format(larghezza,'#.##'), 'P', format(profondita,'#.##'), , 'DATA:',
dataSpedizione)

More details:
http://www.valentina-db.com/docs/dokuwiki/v5/doku.php?id=valentina:products:vstudio:help:report_editor:controls:expression_field:expression_field&s[]=expression

Also, you can choose a SQL engine which will execute all expressions in the
report.
It is controlled by "expression_engine" property. Valentina selected by
default, and you can see errors from it. Such reports are more universal.

If you need to execute expressions, using datasource's engine (MySQL,
PostgreSQL,...), you just set "expression_engine" to 'Datasource'.
It can be useful:
- If you've created some special stored procedures in, for example, MySQL
database and want to call them in report
- if you use some specific functions, which are not present in Valentina.

Best regards,
Sergey Pashkov




On Thu, Nov 14, 2013 at 6:35 PM, Mailing Lists <
themailinglistaddress at gmail.com> wrote:

> Hello !
>
> i cannot understand what’s wrong with this expression…
>
> =concat('NUMERO COLLI:', format(totaleColli,'#'), 'PESO KG: ',
> format(peso,'#.##'), 'H', format(altezza,'#.##'), 'L',
> format(larghezza,'#.##'), 'P', format(profondita,'#.##'), , 'DATA:',
> $F(dataSpedizione))
>
> Valentina Studio keeps to say : Cannot prepare Valentina Reports engine to
> evaluate expressions
>
> If i remove the expression report runs fine..
>
> Any hint ?
>
> Thanks
>
> Matteo
>
> _______________________________________________
> Valentina-studio mailing list
> Valentina-studio at lists.macserve.net
> http://lists.macserve.net/mailman/listinfo/valentina-studio
>
>
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