Hello community,

I've encountered this and I am not sure how it works. It's in the accounting module in the Journal entries form view

Its about that line:

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

What is parent standing for here? Is the notebook (or the widget one2many_list) considered as a child of the <sheet> of the form view. So parent.account_id refers to the account id of the record that's open on the form?

<record id="view_move_form" model="ir.ui.view">
    <field name="name">account.move.form</field>
    <field name="model">account.move</field>
    <field name="arch" type="xml">
        <form string="Account Entry">
            <header>
                <button name="post" states="draft" string="Post" type="object" class="oe_highlight" groups="account.group_account_invoice"/>
                <button name="%(action_view_account_move_reversal)d" states="posted" string="Reverse Entry" type="action" groups="account.group_account_invoice"/>
                <button name="button_cancel" states="posted" string="Cancel Entry" type="object" groups="account.group_account_invoice"/>
                <field name="state" widget="statusbar"/>
            </header>
            <sheet>
                <div class="oe_button_box">
                    <button name="open_reconcile_view"
                        class="oe_stat_button"
                        icon="fa-bars"
                        type="object"
                        string="Reconciled entries">
                    </button>
                </div>
            <label for="name" class="oe_edit_only" attrs="{'invisible':[('name','=','/')]}"/>
            <h1>
                <field name="name" readonly="True" attrs="{'invisible':[('name','=','/')]}"/>
            </h1>
            <group>
                <group>
                    <field name="journal_id" options="{'no_open': True, 'no_create': True}"/>
                    <field name="date"/>
                </group>
                <group>
                    <field name="ref"/>
                    <field name="company_id" required="1" groups="base.group_multi_company"/>
                    <field name="amount" invisible="1"/>
                    <field name="currency_id" invisible="1"/>
                </group>
            </group>
            <notebook>
                <page string="Journal Items">
                    <field name="line_ids" widget="one2many_list"
                      context="{'line_ids': line_ids, 'journal_id': journal_id }">
                        <tree editable="bottom" string="Journal Items">
                            <field name="account_id" domain="[('company_id', '=', parent.company_id), ('deprecated', '=', False)]"/>
                            <field name="partner_id"
                                domain="['|', ('parent_id', '=', False), ('is_company', '=', True)]"/>
                            <field name="name"/>
                            <field name="analytic_account_id" groups="analytic.group_analytic_accounting"/>
                            <field name="amount_currency" groups="base.group_multi_currency"/>
                            <field name="company_currency_id" invisible="1"/>
                            <field name="currency_id" options="{'no_create': True}" groups="base.group_multi_currency"/>
                            <field name="debit" sum="Total Debit"/>
                            <field name="credit" sum="Total Credit"/>
                            <field name="date_maturity" required="0"/>
                        </tree>
                    </field>
                    <field name="narration" colspan="4" placeholder="Add an internal note..." nolabel="1" height="50"/>
                </page>
            </notebook>
            </sheet>
        </form>
    </field>
</record>