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Hi Luca<br>
<br>
Would this core functionality of QGIS be an option for you?<br>
<br>
<a class="moz-txt-link-freetext" href="https://www.qgis.org/en/site/forusers/visualchangelog210/index.html#feature-filter-chaining-for-relation-reference-widget">https://www.qgis.org/en/site/forusers/visualchangelog210/index.html#feature-filter-chaining-for-relation-reference-widget</a><br>
<br>
If you are still required to use python in your forms: are you using
global variables? They can be an issue for embedded forms.<br>
<br>
Cheers,<br>
Matthias<br>
<br>
<div class="moz-cite-prefix">On 10/02/2015 09:09 AM, Luca Lanteri
wrote:<br>
</div>
<blockquote
cite="mid:CAM_TN38uzpZjCD0Q5eVJPk5ZDYpQ_DN35Br=nsRLONi2ERe67w@mail.gmail.com"
type="cite">
<div dir="ltr">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.
<div>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.</div>
<div><br>
</div>
<div>I can open a ticket and add some test data.</div>
<div>If it is a minor bug and it could be resolved easily I
really offer a pizza and a beer to resolve it.</div>
<div><br>
</div>
<div>All the best</div>
<div>Luca</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2015-10-01 23:53 GMT+02:00 Luca Lanteri
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:mescal72@gmail.com" target="_blank">mescal72@gmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>
<div>
<div>Hi,<br>
<br>
</div>
now I'm already using the python logic but my code is
terrible and I have a lot of crash problem.<br>
</div>
<div>Now that I using your example all is easier and
seem to worsk fine.<br>
<br>
</div>
<div>I owe you one beer.<br>
Many many tanks !<span class="HOEnZb"><font
color="#888888"><br>
</font></span></div>
<span class="HOEnZb"><font color="#888888">
<div><br>
</div>
<div>Luca<br>
<br>
</div>
</font></span></div>
</div>
<div class="HOEnZb">
<div class="h5">
<div class="gmail_extra"><br>
<div class="gmail_quote">2015-10-01 22:23 GMT+02:00
Blumentrath, Stefan <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:Stefan.Blumentrath@nina.no"
target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:Stefan.Blumentrath@nina.no">Stefan.Blumentrath@nina.no</a></a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="#0563C1" vlink="#954F72" lang="NO-BOK">
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"
lang="EN-US">Hi Luca,</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"
lang="EN-US"> </span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"
lang="EN-US">Sounds like a case for Python
logic!</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"
lang="EN-US">General principles are
explained here:</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"
lang="EN-US"><a moz-do-not-send="true"
href="http://nathanw.net/2011/09/05/qgis-tips-custom-feature-forms-with-python-logic/"
target="_blank">http://nathanw.net/2011/09/05/qgis-tips-custom-feature-forms-with-python-logic/</a></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"
lang="EN-US"> </span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"
lang="EN-US">Also nice, and probably
exactly what you are looking for:</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"
lang="EN-US"><a moz-do-not-send="true"
href="http://medspx.fr/blog/Qgis/cascade_forms/"
target="_blank">http://medspx.fr/blog/Qgis/cascade_forms/</a></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"
lang="EN-US"> </span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"
lang="EN-US">Cheers</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"
lang="EN-US">Stefan</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"
lang="EN-US"> </span></p>
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"
lang="EN-US">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"
lang="EN-US"> <a moz-do-not-send="true"
href="mailto:qgis-user-bounces@lists.osgeo.org"
target="_blank">qgis-user-bounces@lists.osgeo.org</a>
[mailto:<a moz-do-not-send="true"
href="mailto:qgis-user-bounces@lists.osgeo.org"
target="_blank">qgis-user-bounces@lists.osgeo.org</a>]
<b>On Behalf Of </b>Luca Lanteri<br>
<b>Sent:</b> 1. oktober 2015 22:07<br>
<b>To:</b> qgis-user <<a
moz-do-not-send="true"
href="mailto:Qgis-user@lists.osgeo.org"
target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a></a>><br>
<b>Subject:</b> [Qgis-user] QGIS - value
relation widget</span></p>
<div>
<div>
<p class="MsoNormal"> </p>
<div>
<div>
<p class="MsoNormal">Hi to all,<br>
<br>
I need to build a form when the
value of a combo are filtered basing
on the value of anoter combobox.
<br>
I have a first combo where I choose
the region and a second with the
municipalities.
<br>
I need that the second combo shows
only the municipalities of the
choosed region.<br>
I tried to use use the widget
"relationship value" with the a
filter like classe_munic =
attribute($currentfeature,
'classe_munic') without any success.
<br>
<br>
Has anyone ever done something
similar?<br>
Thank in advance </p>
</div>
<p class="MsoNormal"
style="margin-bottom:12.0pt"><br>
Luca</p>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</div>
</blockquote>
</div>
<br>
</div>
<br>
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