Loading a plugin that adds to the processing plugin does not work correctly

[qgib]

Author Name: Ari Jolma (Ari Jolma)
Original Redmine Issue: 16238
Affected QGIS version: master
Redmine category:processing/core
Assignee: Victor Olaya

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Loading a plugin that adds to the processing plugin leads to a keyerror:

Traceback (most recent call last):
  File "/home/ajolma/usr/share/qgis/python/plugins/processing/gui/ProcessingToolbox.py", line 320, in addProvider
    providerItem = TreeProviderItem(provider_id, self.algorithmTree, self)
  File "/home/ajolma/usr/share/qgis/python/plugins/processing/gui/ProcessingToolbox.py", line 383, in __init__
    self.populate()
  File "/home/ajolma/usr/share/qgis/python/plugins/processing/gui/ProcessingToolbox.py", line 395, in populate
    provider = algList.algs[self.provider_id]
KeyError: 'perl'

This is probably due to a bug in core/alglist.py, where the provider is added to processing registry before adding it to the algs hash, leading to a chicken-and-egg type of problem.

The bug is not fatal since the plugin gets loaded and once it is activated in the processing options (a deactivate - activate cycle is needed), it is ok.

In addition, I did not get the _loadAlgorithms method of the provider to execute via any other way than through an unload-load-deactivate-activate cycle.

[qgib]

Author Name: Ari Jolma (Ari Jolma)

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I forgot to mention that the plugin initially loads ok. This bug happens only when one unloads + loads the plugin, which I had to do to invoke the refreshing of the algorithm list.

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• easy_fix was configured as 0
• regression was configured as 0

[qgib]

Author Name: Alexander Bruy (@alexbruy)

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Still true in latest master?

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• description was changed from Loading a plugin that adds to the processing plugin leads to a keyerror:

Traceback (most recent call last):
  File "/home/ajolma/usr/share/qgis/python/plugins/processing/gui/ProcessingToolbox.py", line 320, in addProvider
    providerItem = TreeProviderItem(provider_id, self.algorithmTree, self)
  File "/home/ajolma/usr/share/qgis/python/plugins/processing/gui/ProcessingToolbox.py", line 383, in __init__
    self.populate()
  File "/home/ajolma/usr/share/qgis/python/plugins/processing/gui/ProcessingToolbox.py", line 395, in populate
    provider = algList.algs[self.provider_id]
KeyError: 'perl'

This is probably due to a bug in core/alglist.py, where the provider is added to processing registry before adding it to the algs hash, leading to a chicken-and-egg type of problem.

The bug is not fatal since the plugin gets loaded and once it is activated in the processing options (a deactivate - activate cycle is needed), it is ok.

In addition, I did not get the _loadAlgorithms method of the provider to execute via any other way than through an unload-load-deactivate-activate cycle.
to Loading a plugin that adds to the processing plugin leads to a keyerror:

Traceback (most recent call last):
  File "/home/ajolma/usr/share/qgis/python/plugins/processing/gui/ProcessingToolbox.py", line 320, in addProvider
    providerItem = TreeProviderItem(provider_id, self.algorithmTree, self)
  File "/home/ajolma/usr/share/qgis/python/plugins/processing/gui/ProcessingToolbox.py", line 383, in __init__
    self.populate()
  File "/home/ajolma/usr/share/qgis/python/plugins/processing/gui/ProcessingToolbox.py", line 395, in populate
    provider = algList.algs[self.provider_id]
KeyError: 'perl'

This is probably due to a bug in core/alglist.py, where the provider is added to processing registry before adding it to the algs hash, leading to a chicken-and-egg type of problem.

The bug is not fatal since the plugin gets loaded and once it is activated in the processing options (a deactivate - activate cycle is needed), it is ok.

In addition, I did not get the _loadAlgorithms method of the provider to execute via any other way than through an unload-load-deactivate-activate cycle.

• status_id was changed from Open to Feedback

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Closing for lack of feedback, please reopen if necessary.

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• status_id was changed from Feedback to Closed
• resolution was changed from to not reproducable

[qgib]

Author Name: Arnaud Morvan (@arnaud-morvan)

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There is no more "algList" in source code, registry should be used everywhere now, so this should not append anymore.