Hello,

I have an issue with one2many field, please review this example code:

Model:

class ParentModel(models.Model):
    _name = 'parent.model'
    parent_field = fields.Char(compute='_compute_parent_field')
	​ children_ids = fields.One2many('child.model', 'parent_id', string='Children')

    @api.depends('children_ids.child_field')
    def _compute_parent_field(self):
        for record in self:
            # Custom logic to compute parent_field based on child_field
            record.parent_field = 'Computed Value' if record.children_ids else 'Default Value'

class ChildModel(models.Model):
    _name = 'child.model'
    parent_id = fields.Many2one('parent.model', string='Parent')
    related_parent_field = fields.Char(related='parent_id.parent_field')

    child_field = fields.Char()

View:

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data>
        <record id="parent_model_form" model="ir.ui.view">
            <field name="name">parent_model_form</field>
            <field name="model">parent.model</field>
            <field name="arch" type="xml">
                <form>
                    <sheet>
                        <group>
                            <field name="parent_field"/>
                        </group>
                    <notebook>
                        <page string="Children">
                            <field name="children_ids">
                                <tree>
                                    <field name="child_field"/>
                                    <field name="related_parent_field"/>
                                </tree>
                            </field>
                        </page>
                    </notebook>
                    </sheet>
                </form>
            </field>
        </record>
    </data>
</odoo>

The child_field change value is properly computed, parent_field is updated and displayed in the parent.

The related_parent_field is also updated and displayed for the current child record.

The problem is the other child records are not updated.

When I edit other child records, I see the old value of related_parent_field.

I have to save the parent record to see the changes in other child records.

Hope you can help me with this issue.

Thanks in advance.

Here's a more concrete example that clearly demonstrates the issue:

```python

# Models

class ProductCategory(models.Model):

    _name = 'product.category'

    _description = 'Product Category'

    name = fields.Char(string='Category Name', required=True)

    total_products = fields.Integer(string='Total Products', compute='_compute_total_products')

    product_ids = fields.One2many('product.product', 'category_id', string='Products')

    @api.depends('product_ids.active')

    def _compute_total_products(self):

        for category in self:

            category.total_products = len(category.product_ids.filtered(lambda p: p.active))

class Product(models.Model):

    _name = 'product.product'

    _description = 'Product'

    name = fields.Char(string='Product Name', required=True)

    active = fields.Boolean(string='Active', default=True)

    category_id = fields.Many2one('product.category', string='Category')

    category_total = fields.Integer(related='category_id.total_products', string='Products in Category')

```

```xml

<!-- Product Category Form View -->

<record id="product_category_form_view" model="ir.ui.view">

    <field name="name">product.category.form</field>

    <field name="model">product.category</field>

    <field name="arch" type="xml">

        <form>

            <sheet>

                <group>

                    <field name="name"/>

                    <field name="total_products"/>

                </group>

                <notebook>

                    <page string="Products">

                        <field name="product_ids">

                            <tree>

                                <field name="name"/>

                                <field name="active"/>

                                <field name="category_total"/>

                            </tree>

                        </field>

                    </page>

                </notebook>

            </sheet>

        </form>

    </field>

</record>

```

## Steps to Reproduce the Issue:

1. Create a new Product Category "Electronics"

2. Add three products to this category: "Laptop", "Phone", "Tablet"

3. Notice that `total_products` shows 3 and all products show `category_total = 3`

4. Edit the first product "Laptop" and uncheck the "Active" box

5. Notice that:

   - The `total_products` on the category updates correctly to 2

   - The `category_total` on the "Laptop" product updates correctly to 2

   - But the `category_total` on "Phone" and "Tablet" still shows 3 (incorrect)

6. Only after saving the form, the `category_total` value on all products updates correctly

This example clearly shows how field changes in one record (deactivating a product) correctly trigger computed fields in the parent (category.total_products), but the related fields in sibling records don't refresh automatically without saving.