Active object is not a selected mesh. temp_override is invalid? [duplicate]

Question

blender-3.4.1

import bpy

objs = [obj.name for obj in bpy.data.objects if obj.visible_get()]

print(objs)

active_object = bpy.data.objects["Cube"]
selected_objects = [
    active_object, 
    bpy.data.objects["Cube.001"]
    ]  
with bpy.context.temp_override(active_object=active_object, selected_objects=selected_objects):
    bpy.ops.object.join()

output:

['Cube', 'Cube.001']
Warning: Active object is not a selected mesh

What did i do wrong?

Answer 1

Simply assigning the selected objects to variable selected_objects doesn't mean you can join them. They have to be actually selected for bpy.ops.object.join() to work. Here's the script that will work:

import bpy

objs = [obj.name for obj in bpy.data.objects if obj.visible_get()]

print(objs)

active_object = bpy.data.objects["Cube"]
selected_objects = [
    active_object, 
    bpy.data.objects["Cube.001"]
]

with bpy.context.temp_override(active_object=active_object, selected_objects=selected_objects):
    bpy.ops.object.select_all(action='DESELECT')
    for obj in selected_objects:
        obj.select_set(True)
    bpy.context.view_layer.objects.active = active_object
    bpy.ops.object.join()