QGIS Server: getFeature expression does not work

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Author Name: Andreas Neumann (@andreasneumann)
Original Redmine Issue: 12090
Affected QGIS version: master
Redmine category:qgis_server
Assignee: Marco Hugentobler

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It seems like in current master the attribute(getFeature()) expression does not work in a maptip.

I used the following maptip on layer "Langsamverkehrszonen":

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[% "objekt_projektbezeichnung" %]
Status: [% attribute(getFeature('Status Begegnungszone', 'code', status_t30_begegnungszone),'wert')%] [%COALESCE('
Inbetriebnahme: ' || year(ende_baustelle),'')%]

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The attribute(getFeature()) expression works fine in QGIS desktop, but does not work in QGIS server. QGIS server does not correctly evaluate the expression.

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• getFeature_expression_qgis_server_problem.zip (Andreas Neumann)
• feature_info.png (Marco Hugentobler)

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Author Name: Andreas Neumann (@andreasneumann)

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Forgot to mention that this concerns the response of the GetFeature request.

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Author Name: Giovanni Manghi (@gioman)

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Hi Andreas, is this a regression?

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• version was changed from 2.6.0 to master
• status_id was changed from Open to Feedback

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Author Name: Andreas Neumann (@andreasneumann)

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Hi Giovanni,

I don't know if this ever worked. It is the first time I tried this expression in server context. This feature was introduced in QGIS 2.6

But Marco promised to have a look at it.

Andreas

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Author Name: Marco Hugentobler (@mhugent)

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I tested it here, however it seems to work here (unless I overlooked something). E.g. doing a featureinfo at the green polygon of the attached screenshot returns: 'Tempo 30 Zone Brunnenwiesenstrasse
Status: bestehend, in Betrieb Inbetriebnahme: 2012' as maptip field. Isn't this the expected outcome?

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• 8386 was configured as feature_info.png

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• feature_info.png (Marco Hugentobler)

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Author Name: Andreas Neumann (@andreasneumann)

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Hi Marco,

Very strange - it does not work on my QGIS server. I will try on a different machine - or we could have a look at it next week with teamviewer.

btw: hope you feel better again? Heard you are sick at home ...

Thanks,
Andreas

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Author Name: Marco Hugentobler (@mhugent)

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It is probably because I loaded the whole group as WMS layer into QGIS. If you load only 'Langsamverkehrszonen', it will not work, because QGIS cannot know about the two layers in Hilfstabellen.
The correct approach in the server would be to check that before the request (as it is done for joins and value relations). Difficulty is that the expression can be anywhere, not only in the displayfield.

[qgib]

Author Name: Marco Hugentobler (@mhugent)

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Fixed in 27bf440

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• status_id was changed from Feedback to Closed