Hi everyone.

I'm trying to do a server action that call another server action but with different model.

The model of my first action is purchase.order, which contains the lines of code 

    stock_landed_cost_line = record.env['stock.landed.cost.lines'].create(
    {
    'cost_id': stock_landed_cost_id.id,
    'product_id': 7,
    'account_id': 366,
    'split_method': 'by_current_cost_price',
    'price_unit': abs(price_landed_cost)
    })

    action = { "type": "ir.actions.server", "id": 640, "model_id": 426, }

My second server action has the id = 640 and the model of this one is stock.landed.cost, it's simple and the line of code is

record.compute_landed_cost()

At the moment that I trigger the first action, the next error appears:

AttributeError: 'NoneType' object has no attribute 'compute_landed_cost'

Am I doing something wrong? What is the appropriate way to trigger one server action from another server action?

Thanks for your help!