Error opening data loader dialog from MetaSearch

[AndreasVaage]

Describe the bug

I got the following error when opening the data loader dialog from MetaSearch:

‼️	AttributeError: type object 'WidgetMode' has no attribute 'Embedded'

With the full error message:

Traceback (most recent call last):
File "/usr/share/qgis/python/plugins/MetaSearch/dialogs/maindialog.py", line 770, in 
add_to_ows QgsProviderRegistry.WidgetMode.Embedded)
AttributeError: type object 'WidgetMode' has no attribute 'Embedded'

How to Reproduce

1. Open MetaSearch.
2. Select a CSW and a service (I have tested with WMS and WFS).
3. Click "Add Data".
4. Select option from the drop down menu.
5. See error.

QGIS and OS versions

QGIS version	3.16.1-Hannover	QGIS code revision	b381a90
Compiled against Qt	5.9.5	Running against Qt	5.9.5
Compiled against GDAL/OGR	2.2.3	Running against GDAL/OGR	2.2.3
Compiled against GEOS	3.6.2-CAPI-1.10.2	Running against GEOS	3.6.2-CAPI-1.10.2 4d2925d6
Compiled against SQLite	3.22.0	Running against SQLite	3.22.0
PostgreSQL Client Version	10.15 (Ubuntu 10.15-0ubuntu0.18.04.1)	SpatiaLite Version	4.3.0a
QWT Version	6.1.3	QScintilla2 Version	2.10.2
PROJ.4 Version	493
OS Version	Ubuntu 18.04.5 LTS
Active python plugins	processing; MetaSearch; db_manager

Additional context

I first ran into and circumvented issue #38074 by manually upgrading owslib as suggested by johtoblans comment.

The relevant line was introduced in #34861.

[gioman]

How to Reproduce

1. Open MetaSearch.

2. Select a CSW and a service (I have tested with WMS and WFS).

3. Click "Add Data".

4. Select option from the drop down menu.

5. See error.

@AndreasVaage cannot replicate on 3.16.1 on Ubuntu 20.04

[AndreasVaage]

Thank you for testing so quickly. I tried purging and installing 3.10.12 LTR instead, but got the same error, except the relevant line changed from 770 to 769. Any suggestion for how I can go forward debugging this?

[gioman]

Any suggestion for how I can go forward debugging this

@tomkralidis any idea?

[tomkralidis]

fwiw I cannot reproduce either locally.

[gioman]

fwiw I cannot reproduce either locally.

@tomkralidis I was able to replicate the reported issue on a clean Ubuntu 18.04 machine with QGIS 3.16.1.

I had to upgrade manually owslib to 0.19 (otherwise #38074). I was not able to upgrade to a more recent version because it has dependencies (like proj 7.2) that I can't be quickly solved.

[alexbruy]

I can't reproduce. Is this still valid?

[github-actions]

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[github-actions]

While we hate to see this happen, this issue has been automatically closed because it has not had any activity in the last 42 days despite being marked as feedback. If this issue should be reconsidered, please follow the guidelines in the previous comment and reopen this issue.
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