Bug report #16070
FeatureIDs for in-memory vector layers are counting from one, can't set them manually
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: | - | ||
| Category: | Vectors | ||
| Affected QGIS version: | 2.18.0 | Regression?: | No |
| Operating System: | Windows | Easy fix?: | No |
| Pull Request or Patch supplied: | No | Resolution: | end of life |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 23985 |
Description
Steps to reproduce¶
- Create new memory layer via python
- Create a feature
- Optionally: Set its ID to 0 (via feature.setFeatureID(0))
- Insert the feature (via data provider, is there another way that doesn't internally use the data provider?)
Observed behaviour¶
ID of inserted feature is 1, regardless of whether it's set or not. Additionally inserted features will have higher IDs.
Expected Behaviour¶
Index should be zero-based by default just as it is for OGR layers. When the index is set manually, it should get the assigned value.
History
#1
Updated by Giovanni Manghi almost 8 years ago
- Category set to Vectors
#2
Updated by Nyall Dawson almost 8 years ago
- Status changed from Open to Closed
- Resolution set to wontfix
This is by design. Feature IDs are set by the provider and are not intended or designed to be manually set.
#3
Updated by Georg Wicke almost 8 years ago
- Status changed from Closed to Reopened
But we still have inconsistent behaviour of OGR vs. memory layers. They should either both use zero-based indices or both use one-based indices. This would make it possible to handle a layer copied into memory, e. g. to display something in a non-permanent fashion, in the same way as one would handle the same layer loaded directly via OGR.
#4
Updated by Georg Wicke almost 8 years ago
By the way, this should at least be documented a bit more. It is not intuitive that there is a method to set the ID in the public API, which is completely useless, because that ID will be overridden anyway.
#5
Updated by Giovanni Manghi over 7 years ago
- Regression? set to No
- Easy fix? set to No
#6
Updated by Giovanni Manghi over 5 years ago
- Resolution changed from wontfix to end of life
- Status changed from Reopened 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/
QGIS 3.4 has recently become our new Long Term Release (LTR) version. This is a major step in our history – a long term release version based on the massive updates, library upgrades and improvements that we carried out in the course of the 2.x to 3x upgrade cycle.
We strongly encourage all users who are currently using QGIS 2.18 LTR as their preferred QGIS release to migrate to QGIS 3.4. This new LTR version will receive regular bugfixes for at least one year. It also includes hundreds of new functions, usability improvements, bugfixes, and other goodies. See the relevant changelogs for a good sampling of all the new features that have gone into version 3.4
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