Odoo 10 - understanding singleton - ValueError: Expected singleton: product.template() -

Question

I have a custom model:

class ProductExtended(models.Model):
  ...
  product_id = fields.Many2one('product.template', 'Product')
  ...

And I am trying to do the following inside a method:

....
new_record.product_id = new_parametrized_product
....

where:

new_record = product.extended(1724,)
new_parametrized_product = product.template(1275,)

but I get:

ValueError: Expected Singleton: product.template()

Could someone help me to understand what is wrong here?

Answer 1

The ValueError you're seeing is because somewhere you're calling something on a product.template that does not exist. The expected singleton is empty in this case.

Without seeing the full stack trace of the error, it's hard to say exactly which bit is causing the error, but it's definitely because you have an empty recordset somewhere.