[Qgis-user] Filter in field group sections of report

[Jésahel Benoist]

Hello Yann,

You can do it programmatically with python and a custom toolbar.

But, I had a similar problem and happily, qgis as a multipurpose tool is
widely accepted by average users and filtering can be easily explained.

In fact my problem was worst, I have tens of layers. I created two layers,
one with geometric feature, one linked to the previous with (let say)
temporal features, and finally a virtual one linking the two previous for
special purposes. All others layers are linked to the temporal one. I
created and shared the multiple layers tools toolbar that permits to filter
a set of layers based on the first in the list (which is the temporal). So
when I click on the multiple filter button, all layers are filtered, and
only the specific needed items are drawn and used for printing.

Explaining the filter button tooks me 5 minutes, really, even to the most
allergic to computers person I know. Of course readable fields names and
readable values helps a lot !

I can give you some later code for a custom toolbar with automatic
filtering that I created to speed things.

Regards

Jésahel

Le lun. 11 oct. 2021 à 14:33, Yann Voté <ygversil at lilo.org> a écrit :

> Hi Jésahel,
>
> Thanks for your reply. Your proposed solution would be fine if it was
> just me. What I forgot to say is the purpose: I want to share the QGIS
> project with other users who have limited QGIS skills.
>
> A user story would be: the user opens the QGIS project, selects the
> polygon layer A, selects the Generate Report action from the action
> menu, clicks on the desired polygon, and the PDF report for the clicked
> polygon gets generated.
>
> Or something similar with a processing algorithm.
>
> I think I found a workaround by using an atlas instead of a report. An
> atlas is OK for this particular case: main polygon layer A related with
> a non-geometric layer B whose data can be displayed within an Attribute
> Table item. Contrary to a report, an atlas output can be filtered with
> the `is_selected()` expression.
>
> I will continue to explore this path and let everyone know the found
> solution in the forum thread when I'm done.
>
> But I still believe that, for more complex use cases, namely maps in
> sections and related maps in subsections, which require a report, a
> filter option would be extremely useful.
>
> Regards.
>
> Yann
>
>
> Le 10/10/2021 à 23:20, Jésahel Benoist a écrit :
> > Hi Yann,
> >
> > As I'm often using reports based on filtered datas, and as I see that
> > you know how to filter, I don't really understand what is the problem.
> > You can just apply a filter in the main ui on the a or b layer, or make
> > virtual layers with only the needed datas. Then use the report (close
> > when a change is made in the main ui).
> >
> > Regards,
> >
> > Jésahel
> >
> > Le dim. 10 oct. 2021 à 18:53, Yann Voté <ygversil at lilo.org
> > <mailto:ygversil at lilo.org>> a écrit :
> >
> >     Hi everyone,
> >
> >     Let's imagine we have a polygon layer named Layer A with tons of
> >     features (tens of thousands), and an attribute layer named Layer B
> with
> >     even more features. Each polygon in Layer A is associated with one or
> >     more rows in Layer B.
> >
> >     Now suppose we have created a report with a top section for Layer A
> >     containing a map centered at each polygon, and a subsection for
> Layer B
> >     showing attributes for each related B row.
> >
> >     Is there a way to output the report for exactly one polygon in layer
> A,
> >     or for only some polygons (for example selected polygons) ?
> >
> >     And is there a way in the subsection to output only some of the
> related
> >     rows based on some filter expression ?
> >
> >     I am aware of this feature request
> >
> >     https://github.com/qgis/QGIS/issues/44821
> >     <https://github.com/qgis/QGIS/issues/44821>
> >
> >     but is there a way to achieve this with more steps in the UI or with
> >     pyQGIS ?
> >
> >     Thanks a lot !
> >
> >     Regards.
> >
> >     --
> >     Yann Voté - ygversil at lilo.org <mailto:ygversil at lilo.org>
> >     _______________________________________________
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