I have many2one field name_id in my_model.xml view.
I want to filter and have possibility select from name_id field only these values which have a relation with active form view model.
Example:
I have 'my.model' class records:
id = 1
title = 'Aloha'

id = 2
title = 'Bye'
'my.model.line' class records:
id = 1
name = 'first'
my_model_id = 1

id = 2
name = 'second'
my_model_id = 1

id = 3
name = 'item'
my_model_id = 2
So when I open form view, and click on add an item from name_id many2one field I want to have selection only from values: 'first', 'second' if active 'my.model' id = 1. If 'my.model' id = 2name_id many2one field selection just from 'item' value.
my_model.xml

 <record model="ir.ui.view" id="view_my_model_form">
     <field name="name">my.model.form</field>
     <field name="model">my.model</field>
     <field name="arch" type="xml">
        <form string="My Model">
          <header>
               <field name="my_model_line">
                     <tree>
                         field name="name"/>
                      </tree>
               </field>
      <notebook>
           <page>
              <field name="supply_conditions_status">
                  <tree string="My model Lines">
                        <field name="name_id"/>
                  </tree>
Models:
class SupplyConditions(models.Model):
    _name = 'supply.conditions'
    name_id = fields.Many2one('my.model.line', string='Product')
    model_id = fields.Many2one('my.model')

class MyModelLine(models.Model):
    _name = 'my.model.line'
    name = fields.Char('Name')
    my_model_id = fields.Many2one('my.model')

class MyModel(models.Model):
    _name = 'my.model'
    title = fields.Char('Title')
    my_model_line = fields.One2many('my.model.line', 'my_model_id')
    supply_conditions_status = fields.One2many('supply.conditions', 'model_id')
I have no idea how to do this. Can't use domain on xml view because can't reach active 'my.model' id. Tried on name_id use _default_value but nothing.. Maybe with relations but also have no idea how. Need any hints..