I need to assign a sequence default_code to created products depending on their categories using an Automated Action.

My problem is that I can't access the categ_id. Does anyone know how to solve this problem?

Example:

code: 

if not record.default_code:

  if record.categ_id
== 1:

    record.write({

      'default_code':
env ['ir.sequence'].next_by_code('cat1')

    })

  else:

    record.write({

      'default_code':
env ['ir.sequence'].next_by_code('cat2')

    })

log:

2022-09-08 16:14:27,094 4 WARNING odoo-categories-test-5807939 odoo.models: unsupported operand type(s) for "==": 'product.category()' == '1' (None:15)