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<font face="Ubuntu">Hi,<br>
<br>
I don't know any way to do this, except for using a workaround.<br>
But it will depend on your use-case.<br>
Maybe using query layers, such as <br>
<br>
QgsVectorLayer("table='(select * from <schema>.<table>
<your conditions>)' service='<service>'
key='<unique id column>'", "<table name>", "postgres")<br>
<br>
</font>can help ?<br>
<br>
Regards,<br>
Jacky<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">Le 09/08/2022 à 11:15, Johannes Kröger
(WhereGroup) via QGIS-Developer a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:49942115-49f7-4a62-7ff0-aae691dd1be5@wheregroup.com">Howdy!
<br>
<br>
I'd like to force a provider filter when a user adds a PostGIS
layer and have it applied *before* any data is loaded. Setting it
after the layer (and some of its big data) is loaded initially is
not an option.
<br>
<br>
Is there a way to sneak in between "user clicked something in the
GUI to load a table/query and QGIS will construct a QgsVectorLayer
now" and "QGIS now talks to the PostGIS database to get the data
for the new layer", maybe with a signal?
<br>
<br>
Something like a "layerAboutToBeLoaded" (like the opposite
layerWillBeRemoved on
<a class="moz-txt-link-freetext" href="https://qgis.org/pyqgis/master/core/QgsProject.html">https://qgis.org/pyqgis/master/core/QgsProject.html</a>) basically.
:o)
<br>
<br>
Cheers, Hannes
<br>
<br>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Jacky Volpes
Ingénieur SIG - Oslandia</pre>
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