Bug report #16544
Memory Layers do not seem to support the ExactIntersect flag for getFeatures(QgsMapRequest)
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: | - | ||
| Category: | Virtual Layers | ||
| Affected QGIS version: | 2.18.5 | Regression?: | No |
| Operating System: | Easy fix?: | No | |
| Pull Request or Patch supplied: | No | Resolution: | end of life |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 24450 |
Description
Steps to reproduce¶
1. Create a vector memory layer with some features
2. Try accessing getFeatures(QgsMapRequest) in Python:
request = QgsFeatureRequest(QgsRectangle(mapCoords, mapCoords)) # insert e. g. click coordinates here request.setFlags(QgsFeatureRequest.ExactIntersect) features = list(memoryLayer.getFeatures(request))
Observed behaviour¶
No feature is returned.
Expected behaviour¶
The features intersecting with the given point are returned.
Remarks¶
On layers loaded from disks, this works like a charm (you don't even need to supply the ExactIntersect flag).
An easy workaround is to not use exact feature requests, but just use normal ones and filtering manually with
feature.geometry().contains(mapCoords)
Something similar could probably be the fix already.
Normal requests return all features which intersect with their bounding box.
See also #16068
Related issues
History
#1
Updated by Jürgen Fischer over 7 years ago
- Description updated (diff)
#2
Updated by Jürgen Fischer over 7 years ago
- Related to Bug report #16068: getFeatures() as well as spartial indices are inaccurate with memory layers added
#3
Updated by Giovanni Manghi over 5 years ago
- Resolution set to end of life
- Status changed from Open to Closed
End of life notice: QGIS 2.18 LTR
Source:
http://blog.qgis.org/2019/03/09/end-of-life-notice-qgis-2-18-ltr/
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