I get the following error when trying this:

ValueError: NameError("name 'attribute_value_ids' is not defined") while evaluating
'for record in self:\n    record["x_studio_fles_inhoud"] = float(attribute_value_ids[0].name)'

I also tried:  product_template_variant_value_ids

Hi,

Go to Products → Variants

Odoo stores attribute values per variant , not in the product template.

Open Odoo Studio

Click the Studio (wrench) icon while on a product variant form.

Click Add Field

• Choose field type: Monetary or Float
• Name it something like Calculated Price
• Enable "Computed Field"

In the Compute field editor , use this expression:

If you're using an attribute like "Weight" with values like 10, 20, etc.:

list_price + float(attribute_value_ids[0].name)

This assumes:

• Only 1 attribute is used
• The value is numeric (like 10, 20…)

If You Have Text Attribute (eg Light, Medium, Heavy):

Use this instead:

list_price + (

  1 if attribute_value_ids[0].name == 'Light' else

  5 if attribute_value_ids[0].name == 'Medium' else

  10 if attribute_value_ids[0].name == 'Heavy' else 0

)

i hope it is usefull