In your case use compute instead, because self will always empty when you write seletion="your method"

I have searched across odoo 17 code where they have selection="method" and they do not use self just use something like self.env to search for other module

O.k. For some reason I cant comment on anybody elses answers or comments. but after trying and playing with this, I can confirm that on the "selection" field, although it can use a callable function to popullate the options, there is no "self" available. so it is basically impossible to reference itself to choose the options based on some parameter of itself. 

However, I ended up solving my ultimate goal by using a Many2one relationship, with a domain based on a parameter of itself and then using the "statusbar" widget on it. Not the most ideal way, but it works. 

Thank you very much for your help and input.

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Previous edit

@Rithik Sandron,

thank you very much for the example, however it doesnt really work.

the logic of getting the record after calling super(etc) works great in the sense that I indeed get a record that I can work with.

The problem now is that If I leave the field

state_test = fields.Selection(selection='get_states')

then, the method gets called before I create the record and every time I look at a record, both moments there is no self.

When I call the method from the create method, although now I do get the correct records and I do have a task to get info out of, it doesnt automatically assign the result to the selection field, and when I try to "force" it by doing:

task.state_test = selection_fields

I get an error saying that it is not the right value, even though it is a list of tuples.

the same behaviour happens when I change the state_test field to this:

state_test = fields.Selection([], string="State Test)

The part I still dont understand is how come when I call pretty much any other method, self does exist all the time, except for only this one method

cheers!

If you're overriding the create method, try this:

from odoo import api

state_test = fields.Selection([('1', 'One'),
                          ('2', 'Two'),
                          ('3', 'Three')], string='State Test')

@api.model_create_multi
def create(self, values_list):
	​for value in values_list:
	​	// here the record has not been created yet, so the self object does not contain the record. self.get_states() will not work
​
	​	​line = super(model_class_name, self).create(vals)
	​	// ​here the record has been created. the record object in returned to line
	​	​line.get_states()  // this will work
	​return line

def get_states(self):
	​for record in self:
	​	​record.state_test = '2'

To change selection fields dynamically:

from odoo import models, fields, api


class IrigTask(models.Model):
	​_name = "irig.task"
	​_description = "irig.task"
	​
	​@api.model
	def ​_get_selection_items(self):
	​	sel = [('1', 'One'), ('2', 'Two')]​
	​	​return sel

	​state_test = fields.Selection(selection=lambda self: self.env['irig.task']._get_selection_items(), string="State Test")

hope this helps. let me know

Hi,

Please try to use api.model decorator before the function starts, and maybe in the self you may be getting a False value, If you are getting False in the print, then you can search the value.

example:

@api.model

def get_states(self):

      sel = [

        ('1','One'), ('2','Two') ]

         print(self)

         for r in self.env['model.name'].search([]):

         //your balance code

Hope it helps