Context lost when purging orphan data in script #50404

New Issue

Henrik Berglund · 2017-01-09T18:09:13+01:00

Henrik Berglund commented

2017-01-09 18:09:13 +01:00

System Information
Win 8.1 64bit

Blender Version
Broken: 2.78a

Short description of error
It seems like the context information is lost after using bpy.ops.outliner.orphans_purge(). Changing the context in a script after this line results in an attribute error. I'm purging orphan data to keep Blender RAM usage from going crazy when repeatedly using my export script that uses scripts which enable shape key export with mirror modifiers.

It is not a huge issue (only need to switch back to the text editor from the outliner) but since it is a script I would like it to work cleanly.

Exact steps for others to reproduce the error
Put the following in a text editor and run the script:

import bpy
bpy.context.area.type = 'OUTLINER'
bpy.context.space_data.display_mode = 'ORPHAN_DATA'
bpy.ops.outliner.orphans_purge()
bpy.context.area.type = 'TEXT_EDITOR'

You will get an error: "AttributeError: 'NoneType' object has no attribute 'type'.

**System Information** Win 8.1 64bit **Blender Version** Broken: 2.78a **Short description of error** It seems like the context information is lost after using bpy.ops.outliner.orphans_purge(). Changing the context in a script after this line results in an attribute error. I'm purging orphan data to keep Blender RAM usage from going crazy when repeatedly using my export script that uses scripts which enable shape key export with mirror modifiers. It is not a huge issue (only need to switch back to the text editor from the outliner) but since it is a script I would like it to work cleanly. **Exact steps for others to reproduce the error** Put the following in a text editor and run the script: import bpy bpy.context.area.type = 'OUTLINER' bpy.context.space_data.display_mode = 'ORPHAN_DATA' bpy.ops.outliner.orphans_purge() bpy.context.area.type = 'TEXT_EDITOR' You will get an error: "AttributeError: 'NoneType' object has no attribute 'type'.

Henrik Berglund commented

2017-01-09 18:09:13 +01:00

Changed status to: 'Open'

Henrik Berglund commented

2017-01-09 18:09:13 +01:00

Added subscriber: @cyaoeu

Joshua Leung commented

2017-01-09 23:48:26 +01:00

Added subscribers: @mont29, @JoshuaLeung

Joshua Leung commented

2017-01-09 23:48:26 +01:00

Changed status from 'Open' to: 'Archived'

Joshua Leung closed this issue

2017-01-09 23:48:26 +01:00

Joshua Leung self-assigned this 2017-01-09 23:48:26 +01:00

Joshua Leung commented

2017-01-09 23:48:26 +01:00

The purge orphan data operator works by saving and reloading the file. That in turn triggers the current context to be destroyed, and a fresh one to be created.

Due to the way that Blender currently works, there isn't really any alternative implementation. Perhaps after @mont29's asset management work there might be other things we can do, but until then, it's best to not use this operator in a script as the last step.

The purge orphan data operator works by saving and reloading the file. That in turn triggers the current context to be destroyed, and a fresh one to be created. Due to the way that Blender currently works, there isn't really any alternative implementation. Perhaps after @mont29's asset management work there might be other things we can do, but until then, it's best to not use this operator in a script as the last step.

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Context lost when purging orphan data in script #50404