Hi all,

i'm trying to combine few custom fields to form product name in tree view. This is my code in py file

prod_name = fields.Char(compute="full_product_name", string="Product Name - CUSTOM")
def full_product_name(self): 
    for rec in self:
        rec.prod_name = rec.name + " " + rec.tension

The problem is I get error 

"TypeError: can only concatenate str (not "product.template.tension") to str"

Field "tension" is of type Manytoone 

How can I get value from this field to concatenate with my rec.name? Thank you!