old_contents: # -*- coding: utf-8 -*-
  # Part of Odoo. See LICENSE file for full copyright and licensing details.
  
  from odoo import api, fields, models
  
  
  class ProductProduct(models.Model):
      _inherit = 'product.product'
  
      rules_count = fields.Integer(compute='_compute_rules_count', string='# Analytic Rules')
  
      def _compute_rules_count(self):
          Analytic = self.env['account.analytic.default']
          for product in self:
              product.rules_count = Analytic.search_count([('product_id', '=', product.id)])
  
  
  class ProductTemplate(models.Model):
      _inherit = 'product.template'
  
      rules_count = fields.Integer(compute='_compute_rules_count', string='# Analytic Rules')
  
      def _compute_rules_count(self):
          for template in self:
              template.rules_count = sum([p.rules_count for p in template.product_variant_ids])
  
      @api.multi
      def action_view_rules(self):
          result = self.env.ref('account_analytic_default.action_product_default_list').read()[0]
          result['domain'] = [('product_id', 'in', self.mapped('product_variant_ids').ids)]
          # Remove context so it is not going to filter on product_id with active_id of template
          result['context'] = "{}"
          return result
  
new_contents: # -*- coding: utf-8 -*-
  # Part of Odoo. See LICENSE file for full copyright and licensing details.
  
  from odoo import api, fields, models
  
  
  class ProductProduct(models.Model):
      _inherit = 'product.product'
  
      rules_count = fields.Integer(compute='_compute_rules_count', string='# Analytic Rules')
  
      def _compute_rules_count(self):
          Analytic = self.env['account.analytic.default']
          for product in self:
              product.rules_count = Analytic.search_count([('product_id', '=', product.id)])
  
  
  class ProductTemplate(models.Model):
      _inherit = 'product.template'
  
      rules_count = fields.Integer(compute='_compute_rules_count', string='# Analytic Rules')
  
      def _compute_rules_count(self):
          for template in self:
              template.rules_count = sum([p.rules_count for p in template.product_variant_ids])
  
      @api.multi
      def action_view_rules(self):
          result = self.env.ref('account_analytic_default.action_product_default_list').read()[0]
          result['domain'] = [('product_id', 'in', self.mapped('product_variant_ids').ids)]
          # Remove context so it is not going to filter on product_id with active_id of template
          result['context'] = {'default_product_id': self.mapped('product_variant_ids').id}
          return result
  
subject: select default product when creating analytic rule from product