Edit: Abdullah thankyou we have almost the same code, it's doing the same thing; but I can't use the self in my python function as you do.

Hello I've made this js function that helps me to get the name of a field i'm clicking on:

odoo.define('app_catalogue_achat.index', function (require) {
    "use strict";
    var Model = require('web.Model')
    var custom_model = new Model('app.history')
    $(document).on('click', function() {
        var domElement = $(event.target).val();
        if (domElement)
            // custom_model.call("write", [[55], {'product_id' : 1}])
            custom_model.call('my_function', [[domElement]], {})
    });
});

Plus this python function :

@api.model
def my_function(self, val, id):
    print 'ok \n'
    history_product_id = self.env['product.product'].search([('name', 'in', val)])
    print history_product_id.id
    # self.env['purchase.order'].create_history(history_product_id.id)
    # self._get_month()

The python function translate the name i'm getting with js to my product id.

I get the good product id and i want to display it in a tree view (history) that is under my purchase order.

The main problem is that i can't use self in the pyhton function.

Self only working when I'm using an onchange function on the product id of the history tree view.

But when I try to add dynamicly the value that i get with js, I can't use self.

So I coudln't do self.product_id = my val 

or any other solution using self.

Even in the purchase order. 

Your JS function should look like this

_createTimeOff: function () {
   return this._rpc({
        model: 'hr.leave',
        method: 'create_timeoff_portal',
        args: [{
            description: $('.new_timeoff_form .name').val(),
}]
}
you must have same name of the function in your py file
@api.model
def create_timeoff_portal(self, values):
    
for timeoff in self:
    timeoff_values = {
        'name': values['description'],
}
    
    timeoff_rec.sudo().write(timeoff_values)
i HOPE THIS GIVES YOU A LITTLE IDEA ABOUT HOW IT WILL BE DONE.