Set the default value when creating an entry from one2many field - odoo

Question

I want to set the default value for several fields when creating records from one2many field in which the default value will be taken from the parent model.

Odoo Model Structure

class purchase_order(models.Model):
    _inherit='purchase.order'

    cash_forecast_ids = fields.One2many(comodel_name='cash.forecast', inverse_name='purchase_order_id', string='Payment Schedules')


class cash_forecast(models.Model):
    _name='cash.forecast'

    purchase_order_id = fields.Many2one(comodel_name='purchase.order', string='PO', select=True, copy=False)
    foreign_currency_amount = fields.Float("Foreign Currency Amount", copy=False)
    currency_id = fields.Many2one(comodel_name="res.currency", string="Currency", copy=False)
    company_id = fields.Many2one(comodel_name='res.company', string='Company')

Problem: Now, what I want to do, I want to set the currency and company from while the cash forecast record will be created from the PO form view, but I do not know how to do it.

NOTE . I can’t use the currency or field of the company, or since there are several other situations for which the company and currency must be entered manually even if the PO value is not set.

View Order Form

<page string="Deliveries &amp; Invoices" position="after">
    <page string="Payment Scedule">
        <field name="cash_forecast_ids" attrs="{'readonly' : [('state','in',['done','cancel'])]}">
            <tree string="Payment Scedule" editable="bottom">
                <field name="name"/>
                <field name="cash_forecast_type_id" required="1" domain="[('add_to_po_payment_schedule','=',True)]" />
                <field name="note" />
                <field name="forecast_date" />
                <field name="period_id" required="1" />
                <field name="foreign_currency_amount" required="1" />
                <field name="currency_id" required="1" />
                <field name="purchase_order_id" invisible="1"/>
                <field name="company_id" required="1" /> 
            </tree>
        </field>
    </page>
</page>

Can someone suggest me what to do in this case?

Answer 1

, .

one2many, default_field_name: .

context = "{'default_currency_id': currency_id, 'default_company_id': company_id}"

: active_id , , id (s) . .

:

<field name="cash_forecast_ids" context="{'default_currency_id' : currency_id, 'default_company_id' : company_id}">
    <tree string="Payment Scedule" editable="bottom">
        <field name="name"/>
        <field name="forecast_date" />
        <field name="foreign_currency_amount" required="1" />
        <field name="currency_id" domain="[('id','=',parent.currency_id)]" required="1" />
        <field name="purchase_order_id" invisible="1"/>
        <field name="company_id" domain="[('id','=',parent.company_id)]" required="1" /> 
    </tree>
</field>

one2many , .

<field name="company_id" domain="[('id','=',parent.company_id)]" />