old_contents: # -*- encoding: utf-8 -*-
  from osv import fields,osv
  #the ID for the purchase requisition and the material request
  class sale_product(osv.osv):
      _name = "sale.product"
      _description = "Sale Product"
      _columns = {
          'name': fields.char('ID', size=32, required=True),
          'note': fields.char('Description', size=128, required=False),
          'create_uid':  fields.many2one('res.users', 'Creator', readonly=True),
          'create_date': fields.datetime('Creation Date', readonly=True, select=True),
      }
  
new_contents: # -*- encoding: utf-8 -*-
  from osv import fields,osv
  #the ID for the purchase requisition and the material request
  class sale_product(osv.osv):
      _name = "sale.product"
      _description = "Sale Product"
      _columns = {
          'name': fields.char('ID', size=32, required=True),
          'note': fields.char('Description', size=128, required=False),
          'create_uid':  fields.many2one('res.users', 'Creator', readonly=True),
          'create_date': fields.datetime('Creation Date', readonly=True, select=True),
      }
      _sql_constraints = [
          ('name_uniq', 'unique(name)', 'ID must be unique!'),
      ]
subject: Add the ID unique constraint