Library Override: can't add to Collection properties #82118

New Issue

Ovionis · 2020-10-26T23:24:10+01:00

Ovionis commented

2020-10-26 23:24:10 +01:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 770/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 452.06

Blender Version
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-10-23 11:34, hash: e4728d0a16
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-09-21 19:29, hash: 8eda3ddc4f
Worked: version: 2.91.0 Alpha, branch: master, commit date: 2020-09-16 21:05, hash: 27660b3cd9

Short description of error
When an addon uses a CollectionProperty to add data to things (example: bones), it uses [collection_path].add() to add the container for the data.
When the owner (bone/object/etc) of that parameter (CollectionProperty) is linked and a Library Override, Blender returns an error when trying to add to the collection.

Exact steps for others to reproduce the error
cube.blend cube-linked.blend
cube-linked.blend Is the test file.
cube.blend is the file being linked

Open cube-linked.
Run the script on the left in the Text Editor
Copy the test code to the Python Console on the right bpy.context.object.col.add()
The Torus object (not linked) will run as expected.

Select the cube (library override) and run the test code again
Blender will say TypeError: bpy_prop_collection.add(): not supported for this collection

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce GTX 770/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 452.06 **Blender Version** Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-10-23 11:34, hash: `e4728d0a16` Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-09-21 19:29, hash: `8eda3ddc4f` Worked: version: 2.91.0 Alpha, branch: master, commit date: 2020-09-16 21:05, hash: `27660b3cd9` **Short description of error** When an addon uses a `CollectionProperty` to add data to things (example: bones), it uses `[collection_path].add()` to add the container for the data. When the owner (bone/object/etc) of that parameter (CollectionProperty) is linked and a Library Override, Blender returns an error when trying to add to the collection. **Exact steps for others to reproduce the error** [cube.blend](https://archive.blender.org/developer/F9103672/cube.blend) [cube-linked.blend](https://archive.blender.org/developer/F9103673/cube-linked.blend) `cube-linked.blend` Is the test file. `cube.blend` is the file being linked Open `cube-linked`. Run the script on the left in the Text Editor Copy the test code to the Python Console on the right `bpy.context.object.col.add()` The Torus object *(not linked)* will run as expected. Select the cube *(library override)* and run the test code again Blender will say `TypeError: bpy_prop_collection.add(): not supported for this collection`

Ovionis commented

2020-10-26 23:24:10 +01:00

Added subscriber: @Phigon

Philipp Oeser commented

2020-10-27 09:59:08 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-10-27 09:59:08 +01:00

Changed status from 'Needs Triage' to: 'Archived'

Philipp Oeser closed this issue

2020-10-27 09:59:08 +01:00

Philipp Oeser self-assigned this 2020-10-27 09:59:08 +01:00

Philipp Oeser commented

2020-10-27 09:59:08 +01:00

For this to work, you have to flag the CollectionProperty with USE_INSERTION

"Allow users to add new items in that collection in library overrides"

    bpy.types.Object.col = bpy.props.CollectionProperty(
        type=propc,
        options={'LIBRARY_EDITABLE'},
        override={'LIBRARY_OVERRIDABLE', 'USE_INSERTION'},
    )

cube-linked-corrected.blend

It is a bit hidden, but not a bug. Will close (but feel free to comment again if issues persist)

For this to work, you have to flag the `CollectionProperty` with `USE_INSERTION` > "Allow users to add new items in that collection in library overrides" ``` bpy.types.Object.col = bpy.props.CollectionProperty( type=propc, options={'LIBRARY_EDITABLE'}, override={'LIBRARY_OVERRIDABLE', 'USE_INSERTION'}, ) ``` [cube-linked-corrected.blend](https://archive.blender.org/developer/F9109184/cube-linked-corrected.blend) It is a bit hidden, but not a bug. Will close (but feel free to comment again if issues persist)

Philipp Oeser commented

2020-10-27 10:02:22 +01:00

These are the related commits btw.:
c2304d2f02
9756c66720

These are the related commits btw.: c2304d2f02 9756c66720

Ovionis commented

2020-10-27 16:31:43 +01:00

Thank you.
I haven't tested yet but I'm sure it'll work.

Thank you. I haven't tested yet but I'm sure it'll work.

Alfonso Annarumma commented

2022-05-03 10:35:35 +02:00

Added subscriber: @AlfonsoAnnarumma

Alfonso Annarumma commented

2022-05-03 10:35:35 +02:00

With 'USE_INSERTION' you can add new items to the override collection prop, but if you save and reopen the file, the items are not saved.
You can try it with the addon "Selection Sets".

Is it a bug? Probaly is the correct way (you can override and modify the props, but not their structure... I think...)

With 'USE_INSERTION' you can add new items to the override collection prop, but if you save and reopen the file, the items are not saved. You can try it with the addon "Selection Sets". Is it a bug? Probaly is the correct way (you can override and modify the props, but not their structure... I think...)

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Library Override: can't add to Collection properties #82118