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Fix #117422: Move undefined type removal behind after-linking-versioning #117441

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Lukas Tönne merged 3 commits from LukasTonne/blender:fix-node-versioning into main 2024-01-23 15:15:17 +01:00
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Lukas Tönne commented 2024-01-23 11:44:54 +01:00
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There are still node versioning bits running after linking, for example
version_geometry_nodes_replace_transfer_attribute_node. This code
relies on node types being untouched at that point.

Move the unknown node type replacement from ntreeSetTypes into the
ntreeUpdateAllNew function. This is called after late versioning.

There are still node versioning bits running after linking, for example `version_geometry_nodes_replace_transfer_attribute_node`. This code relies on node types being untouched at that point. Move the unknown node type replacement from `ntreeSetTypes` into the `ntreeUpdateAllNew` function. This is called _after_ late versioning.
Lukas Tönne added 1 commit 2024-01-23 11:45:04 +01:00
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a402a68bc8 Nodes: Move undefined type removal behind after-linking-versioning. 
There are still node versioning bits running after linking, for example
`version_geometry_nodes_replace_transfer_attribute_node`. This code
relies on node types being untouched at that point.

Move the unknown node type replacement from `ntreeSetTypes` into the
`ntreeUpdateAllNew` function. This is called _after_ late versioning.
Lukas Tönne commented 2024-01-23 11:45:16 +01:00
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@blender-bot build

@blender-bot build
Lukas Tönne requested review from Brecht Van Lommel 2024-01-23 11:45:32 +01:00
Lukas Tönne requested review from Bastien Montagne 2024-01-23 11:45:33 +01:00
Lukas Tönne added this to the Nodes & Physics project 2024-01-23 11:45:39 +01:00
Lukas Tönne changed title from Nodes: Move undefined type removal behind after-linking-versioning to Fix #117422: Move undefined type removal behind after-linking-versioning 2024-01-23 11:47:43 +01:00
Bastien Montagne requested changes 2024-01-23 12:55:56 +01:00
Bastien Montagne left a comment
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I think comments could use a bit of update here, otherwise patch LGTM.

I think comments could use a bit of update here, otherwise patch LGTM.
source/blender/blenkernel/intern/node.cc Outdated
@ -4097,0 +4083,4 @@
static void node_replace_undefined_types(bNode *node)
{
/* If the integer type is unknown then this is a node from a newer Blender version.
Bastien Montagne commented 2024-01-23 12:51:16 +01:00
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Since there are issues with versioning of old files, I'd assume this can also happen with older files, and mot only newer ones?

Maybe actually this comment would be better placed in the calling function (ntreeUpdateAllNew), since there, at this stage of the blendfile reading process, it can be assumed that unknown types only come from future versions of Blender?

Since there are issues with versioning of old files, I'd assume this can also happen with older files, and mot only newer ones? Maybe actually this comment would be better placed in the calling function (`ntreeUpdateAllNew`), since there, at this stage of the blendfile reading process, it can be assumed that unknown types only come from future versions of Blender?
Lukas Tönne commented 2024-01-23 14:04:00 +01:00
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True, although to my knowledge there's never been a case where a node type was deliberately removed (other than replaced by a newer version as in #117422 ). In that case there should already be code for removing such nodes, otherwise backward compatibility would be broken.

The case with newer nodes is a little more subtle: Blender would still try to read such nodes but can't write them again properly, they have to be removed to prevent bad blend file state.

True, although to my knowledge there's never been a case where a node type was deliberately removed (other than replaced by a newer version as in #117422 ). In that case there should already be code for removing such nodes, otherwise backward compatibility would be broken. The case with _newer_ nodes is a little more subtle: Blender would still try to read such nodes but can't write them again properly, they have to be removed to prevent bad blend file state.
LukasTonne marked this conversation as resolved
source/blender/blenkernel/intern/node.cc Outdated
@ -4097,2 +4099,4 @@
void ntreeUpdateAllNew(Main *main)
{
/* Replace all nodes with unknown types after versioning. */
Bastien Montagne commented 2024-01-23 12:52:33 +01:00
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Would be worth explaining why this has to happen so late in the readfile process.

Would be worth explaining why this has to happen so late in the readfile process.
LukasTonne marked this conversation as resolved
Bastien Montagne commented 2024-01-23 12:56:21 +01:00
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@blender-bot build

@blender-bot build
Lukas Tönne added 1 commit 2024-01-23 14:10:38 +01:00
Lukas Tönne added 1 commit 2024-01-23 14:12:25 +01:00
Brecht Van Lommel approved these changes 2024-01-23 15:04:28 +01:00
Lukas Tönne merged commit f72dbc1ef8 into main 2024-01-23 15:15:17 +01:00
Lukas Tönne deleted branch fix-node-versioning 2024-01-23 15:15:19 +01:00
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