[Qgis-user] QGIS - value relation widget

[Andreas Neumann]

Hi Matthias,

I was also thinking about that - but would it work also with normal 
value relation widgets instead of relation reference widgets?

The option to filter value relation lists, depending on the selection of 
other value relation widgets is probably a quite common request. Would 
be cool if this could be supported in QGIS core.

Andreas

On 02.10.2015 09:24, Matthias Kuhn wrote:
> Hi Luca
>
> Would this core functionality of QGIS be an option for you?
>
> https://www.qgis.org/en/site/forusers/visualchangelog210/index.html#feature-filter-chaining-for-relation-reference-widget
>
> If you are still required to use python in your forms: are you using 
> global variables? They can be an issue for embedded forms.
>
> Cheers,
> Matthias
>
> On 10/02/2015 09:09 AM, Luca Lanteri wrote:
>> Sadly, after further test I discover that the crashes remain, so I 
>> think it is a qgis bug and not a problem in my code.
>> The problem happens when I put my custom form into a subform widget 
>> (QgsRelationEditorWidget). If I add a new record in the subform and I 
>> move to another record using the left column QGIS crashes. It seems 
>> to be a more general problem because the crash appears also when I 
>> add some simple control that modify the object in the form.
>>
>> I can open a ticket and add some test data.
>> If it is a minor bug and it could be resolved easily I really offer a 
>> pizza and a beer to resolve it.
>>
>> All the best
>> Luca
>>
>>
>> 2015-10-01 23:53 GMT+02:00 Luca Lanteri <mescal72 at gmail.com 
>> <mailto:mescal72 at gmail.com>>:
>>
>>     Hi,
>>
>>     now I'm already using the python logic but my code is terrible
>>     and I have a lot of crash problem.
>>     Now that I using your example all is easier and seem to worsk fine.
>>
>>     I owe you one beer.
>>     Many many tanks !
>>
>>     Luca
>>
>>
>>     2015-10-01 22:23 GMT+02:00 Blumentrath, Stefan
>>     <Stefan.Blumentrath at nina.no>:
>>
>>         Hi Luca,
>>
>>         Sounds like a case for Python logic!
>>
>>         General principles are explained here:
>>
>>         http://nathanw.net/2011/09/05/qgis-tips-custom-feature-forms-with-python-logic/
>>
>>         Also nice, and probably exactly what you are looking for:
>>
>>         http://medspx.fr/blog/Qgis/cascade_forms/
>>
>>         Cheers
>>
>>         Stefan
>>
>>         *From:*qgis-user-bounces at lists.osgeo.org
>>         <mailto:qgis-user-bounces at lists.osgeo.org>
>>         [mailto:qgis-user-bounces at lists.osgeo.org
>>         <mailto:qgis-user-bounces at lists.osgeo.org>] *On Behalf Of
>>         *Luca Lanteri
>>         *Sent:* 1. oktober 2015 22:07
>>         *To:* qgis-user <Qgis-user at lists.osgeo.org>
>>         *Subject:* [Qgis-user] QGIS - value relation widget
>>
>>         Hi to all,
>>
>>         I need to build a form when the value of a combo are filtered
>>         basing on the value of anoter combobox.
>>         I have a first combo where I choose the region and a second
>>         with the municipalities.
>>         I need that the second combo shows only the municipalities of
>>         the choosed region.
>>         I tried to use use the widget "relationship value" with the a
>>         filter like classe_munic = attribute($currentfeature,
>>         'classe_munic') without any success.
>>
>>         Has anyone ever done something similar?
>>         Thank in advance
>>
>>
>>         Luca
>>
>>
>>
>>
>>
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>
>
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