How to add a Geometry Node to multiple selected objects (curves, not meshes)?

Question

I have dozens of curves and I want to add a Geometry Node called test to all these selected objects.

The Geometry Node has already been created and I just want to add it to all curves that are selected.

How do I do this with Python script?

Answer 1

It will apply all the modifiers (and convert the curve to mesh)

import bpy
from bpy import context


node_group = bpy.data.node_groups['Geometry Nodes']


for object in context.selected_objects:
    modifier = object.modifiers.new(name='Geometry Nodes', type='NODES')
    modifier.node_group = node_group

    context.view_layer.objects.active = object

    if object.type == 'CURVE':
        bpy.ops.object.convert(target='MESH')
    elif object.type == 'MESH':
        bpy.ops.object.modifier_apply(modifier=modifier.name)

Answer 2

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I tried to create with the help of ChatGPT and came up with this script. In my case it works. The only way I managed to do it ON CURVES (not meshes) was by creating the modifier and specifying the node name for a single active object. Then, simply copy the created modifier to the selected inactive objects.

import bpy

# Select the active object
obj = bpy.context.object

# Add a new Geometry Nodes modifier
modifier = obj.modifiers.new(name="Geometry Nodes", type='NODES')

# Get a reference to the Geometry Nodes modification node
node_group = bpy.data.node_groups["test"]

# Set the modification node as the "test" Geometry Nodes node
modifier.node_group = node_group

# Copy the modifier to other objects
bpy.ops.object.make_links_data(type='MODIFIERS')