How do I get a field from another Model

Question

I am currently running Odoo v13 Community Edition and I am trying to create new fields.
These fields I am creating are inside the * p urchase.order.line* model. These fields are computed but for me to do that I need to get a field called "*currency_rate*" from the *purchase.order* model.
I tried to add this before the function:
@api.depends("purchase.order.currency_rate")
but it did not work.
Then I also tried to get the field by using the following 2 methods
x_unit_price = ... * self.super.curr

Cybrosys Techno Solutions Pvt.Ltd · Answer

Hi,
There is a related Many2one field order_id of purchase.order in the model purchase.order.line.So you can get any field of the corresponding purchase order by referring order_id.
If you want to get a field from the purchase.order model in the method which is defined in the purchase.order.line please follow the given steps.
custom_field = self.order_id.custom_field Regards

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