[Qgis-user] 'NULL' labels

[Olivier Dalang]

Are you sure the change is worth it ?
It's true that it's more consistent, but still, 99% of the time, the user
doesn't want to see "NULL" all over the map.
The coalesce expression isn't easy to find out for beginners neither.

For me it's a -1 unless we have an easy way to hide null values (maybe a
checkbox somewhere in the labeling settings to toggle display of null
values, but this is a bit a duplicate of the data defined "show label", or
maybe having coalesce as the expression by default, but this feels a bit
wrong too).

Also I'm not sure it's correct to display the NULL string on the map, as
it's an user-defined option. This means that a same project file could be
displayed differently on different setups...

Best,

Olivier




2014-04-25 14:10 GMT+02:00 Jürgen E. <jef at norbit.de>:

> Hi Nick,
>
> On Fri, 25. Apr 2014 at 03:53:17 -0700, Nick Hopton wrote:
> > Much obliged Jürgen. After updating QGIS I opened a project that I'd been
> > working on to find a screen full of 'NULL' labels, which worried me a
> > little. The default setting must have changed, I've changed it back now.
>
> No, it didn't.
>
> It just wasn't considered for labels.  NULL string values were implicitly
> converted to empty strings, but NULL in numeric fields to 0.  At least the
> latter is wrong - IMHO the former is too, although that also might have
> been
> considered a feature by some.
>
>
> Jürgen
>
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