-
   In order to test the product_margin module, I create a product margin record
-
  !record {model: product.margin, id: product_margin_wiz0}:
    from_date: !eval "'%s-01-01' %(datetime.now().year)"
    to_date: !eval "'%s-12-31' %(datetime.now().year)"
    invoice_state: open_paid
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  I open margin for PC-DEM
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  !python {model: product.margin}: |
    self.action_open_window(cr, uid, [ref("product_margin_wiz0")], {"lang": 'en_US',
      "search_default_filter_to_sell": "1", "tz": False, "active_model": "product.product", "disable_log": True, 
      "active_ids": [ref("product.product_product_5")], "active_id": ref("product.product_product_5")})
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  I read the fields of the product.
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  !python {model: product.product}: |
    fields = ['sale_avg_price', 'expected_margin_rate', 'total_margin_rate', 'total_cost', 'sale_num_invoiced', 
      'total_margin', 'sales_gap', 'purchase_num_invoiced', 'expected_margin', 'turnover']
    self.read(cr, uid, [ref("product_margin_wiz0")], fields, {"lang": 'en_US',
      "search_default_filter_to_sell": "1", "tz": False, "active_model": "product.product", 
      "bin_size": True, "active_ids": [ref("product.product_product_5")], 
      "active_id": ref("product.product_product_5")})