Naïve question, fields depended on external source of data

[banknote (Constantine Kurbatoff)]

I have the fields:

item_serial_number = fields.Char(....,help = 'The serial number of an item')
model = fields.Char('Model',...
manufacturer = fields.Char('Original manufacturer'
year_of_production = fields.Date('Year'

based on item_serial_number I could request from REST API of the manufacturer’s web-site to obtain data to fill the fields for the user’s convenience: model, manufacturer, year_of_production. What function do you recommend to apply?
I feel that the use

Model.on_change_with_<field_name>

would be correct but how to make ONE API request for all three dependent fields?

Constantine.

[banknote (Constantine Kurbatoff)]

I am thinking of using

Model.on_change_

to change all at once inside this def on_change_item_serial_number()
and fill out other fields. Is that correct? And if you could point me to the example if any?

Constantine.

[ced (Cédric Krier)]

@banknote

I could request from REST API

Which API are you talking?

@banknote

to obtain data to fill the fileds

It is not clear what is your purpose. Who is obtaining the data? Where are they filled?

[banknote (Constantine Kurbatoff)]

I understand, that I was not clear enough. I have edited the original question.
So, I want Tryton fills these fields automatically, based on serial number from user and data pulled from manufacturer’s server trough API.
I want to make user’s life easier and fill the form: so it would be easier just to enter the serial number and other data will be filled automatically.

1. User enters ‘item_serial_number’
2. Press Store
3. Tryton pulls data trough API based on data from ‘items_serial_number’
4. Tryton fills rest of the fileds with this data.

Constantine.

[ced (Cédric Krier)]

@banknote

to change all at once inside this def on_change_item_serial_number()
and fill out other fields. Is that correct?

Yes it is the way.
So your method should look like:

@fields.depends('item_serial_number')
def on_change_item_serial_number(self):
   data = request.post(…)
   self.model = data['model']
   self.manufacturer = data['manufacturer']
   self.year_or_production = dt.datetime.strptime(data['date'], '%Y-%m-%d').date()

[banknote (Constantine Kurbatoff)]

Wonderful!
Thank you!