[QGIS-Developer] two issues in QGIS (Server and print composer) 2.18.10(?)

[João Gaspar]

Hi,
same issue where.

Test Environment OS:
Windows 7 64-bits

QGIS Server 2.14.16 LTR
Print with label text - OK
Print without label text - OK

QGIS Server 2.18.9 64-bits
Print with label text - OK
Print without label text - OK


QGIS Server 2.18.11 64-bits
Print with label text - OK
Print without label text - "Internal Server Error"


I attach a zip file with detail information (logs and .qgs 2.18.9  project
to test) in the qgis bug tracker: https://issues.qgis.org/issues/15440


Cheers
João Gaspar





2017-07-20 23:38 GMT+01:00 Giovanni Manghi <giovanni.manghi at gmail.com>:

> Hi Nyall,
>
>
>
> > It'll be https://github.com/qgis/QGIS/commit/
> 1b4bd47076103e931e642c9c2b6a363f14b20a45
> > which removed the None option.
> >
> > ...HOWEVER...
> >
> > I'm having a lot of trouble trying to understand what the correct
> > server logic is here. Is it:
> >
> > - if a getprint request is made without any layers specified then all
> > layers are shown in both the map and legend
>
> as far as I remember if no layers are specified in the request then no
> layers are shown in the map (not sure about the legend)
>
>
>
> > - if layers are specified then:
> >   - legend set to a map: ONLY those layers should be shown in the map
> and legend
>
> yes, actually as you may have seen form my examples, for layers that
> are not listed in the request their name shows anyway in the legend
> (without the ssymbology symbols or classes).
>
>
> >   - legend set to None: only shown those layers in the map, but
> > EVERYTHING in the legend
> > ?
>
> yes
>
>
>
> The latter has/had a clear purpose, be able to to print via getprint a
> map + a fixed legend, regardless
> of the enabled/disabled layers, exactly as it happens when you print
> from QGIS Desktop.
>
>
>
> > If so, I'd say that's unpredictable, opaque behavior and needs to be
> > fixed in the UI.
> >
> > Possible options would be:
> >
> > 1. adding a server settings section to the legend properties, with a
> > checkbox "always show all layers (Regardless of requested layers)" (or
> > betterly worded!)
> >
> > 2. Taking advantage of the existing "filter legend by map" option to
> > handle this use case (which should already be supported in 2.x - it
> > just needs that setting switched on in your projects). The only
> > downside here is that if a layer is requested but has no features
> > visible in the extent then it won't be shown in the legend. (That's
> > arguably the correct cartographic behaviour though!)
> >
> > I don't think the "none" option should be brought back, as it makes
> > legend behaviour unpredictable in itself. E.g. what scale should the
> > legend use for symbols with map unit sizes? What preset style should
> > it use?
>
>
>
> option 1 seems good to me, anyway whatever the solution this should be
> treated as a priority/bad regression as it broke a very basic
> necessity when we do (for example) webgis with QWC or Lizmap.
>
>
>
> thanks in advance and for understanding
>
>
> cheers!
>
> -- G --
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