Programmatically created extruded text's Z dimension returns zero

Question

With Blender 3.2.0 on Ubuntu 22.04 I am creating text using bpy.data.curves.new, bpy.data.objects.new and py.context.scene.collection.objects.link / bpy.context.collection.objects.link (from https://blender.stackexchange.com/a/163680/33447).

Printing the object and its dimensions (bpy.data.objects[-1].dimensions) property returns

<bpy_struct, Object("Font Object") at 0x7f62e023a608> <Vector (0.4050, 0.4670, 0.0000)>

(bpy.data.curves[-1].dimensions also reports zero height)

whereas the Sidebar tells me 429,490,117 mm.

It also does not work with text created with

bpy.ops.object.text_add()
ob=bpy.context.object
ob.data.body = "my text"

However, it does work for manually created text (clear scene, add Text, extrude). Then run:

import bpy

# manual
last = bpy.data.objects[-1]
print(last)
print(last.dimensions)
    
font_curve = bpy.data.curves.new(type="FONT", name="Font Curve")
font_curve.body = "X"
font_obj = bpy.data.objects.new(name="Font Object", object_data=font_curve)
font_obj.data.extrude = 0.01
bpy.context.collection.objects.link(font_obj)

print(font_obj)    
print(font_obj.dimensions)

bpy.ops.object.text_add()
ob=bpy.context.object
ob.data.body = "text"
ob.data.extrude = 0.01

print(ob)    
print(ob.dimensions)

Output:

<bpy_struct, Object("Text") at 0x7f62e01f4a08>
<Vector (1.8980, 0.6910, 0.0200)>
<bpy_struct, Object("Font Object") at 0x7f62bfbca608>
<Vector (0.7040, 0.6820, 0.0000)>
<bpy_struct, Object("Text.001") at 0x7f62bfbcbe08>
<Vector (1.8980, 0.6910, 0.0000)>

What am I missing?

Answer 1

It works if, after setting the extrusion and linking to the Scene Collection, I use

bpy.context.view_layer.update()

Source: https://blender.stackexchange.com/a/185962/33447

Docs:

• https://docs.blender.org/api/current/bpy.context.html#bpy.context.view_layer
• https://docs.blender.org/api/current/bpy.types.ViewLayer.html#bpy.types.ViewLayer.update

Update data tagged to be updated from previous access to data or operators