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<body text="#000000" bgcolor="#FFFFFF"><div>Ahhh,</div><div>now I finally got what those virtual fields are good for! Great!</div><div>The non-noob way of achieving this so far was e.g. to use a SpatiaLite db and create triggers there. See http://gis.stackexchange.com/a/86470</div><div>This would then be a permanent solution.</div><div><br></div><div>Cheers</div><div>Bernd</div><div><br></div><div>Am 10.02.2016, 10:53 Uhr, schrieb Piotr Kania <p.kania@op.pl>:<br></div><br><blockquote style="margin: 0 0 0.80ex; border-left: #0000FF 2px solid; padding-left: 1ex">
Here it's nice info:<br>
<a class="moz-txt-link-freetext" href="http://www.northrivergeographic.com/archives/qgis-2-6-virtual-fields">http://www.northrivergeographic.com/archives/qgis-2-6-virtual-fields</a><br>
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<div class="moz-cite-prefix">W dniu 2016-02-10 o 10:18, Josefine
Petrenz pisze:<br>
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<div>hej hej,<br>
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at first, I would like to apologize for my english.<br>
<br>
I have a shape-file with several areas. In my attribut
table, each area has an information about the area size.<br>
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Step by step the areas become bigger or smaller. Every time,
when this happened, i have to recalculate the area size. is
there a way, that the area size correct automatically in the
attribute table, when i change the area?<br>
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thanks in advance<br>
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josi <br>
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</blockquote><br><br><br><div id="M2Signature"><div>-- </div><div>Bernd Vogelgesang<br>Siedlerstraße 2<br>91083 Baiersdorf/Igelsdorf<br>Tel: 09133-825374</div></div></body></html>