Hi hello, please somebody can help with this code, look ok for me but I got this error all the time, please i need help to understand 

class sale_order(models.Model):
    _inherit = 'sale.order'

    warehouse_log = fields.One2many('warehouse.log', 'sale_order', 'Warehouse Log')

class WarehouseLog(models.Model):
    _name = 'warehouse.log'
    _description = 'Warehouse log'

    name = fields.Char('Name')
    sale_order = fields.Many2one('sale.order', 'Sale Order')

<odoo>
    <data>
    

        <record id="sale_order_form_page_warehouse_log" model="ir.ui.view">
            <field name="name">sale_order_form_page_warehouse_log</field>
            <field name="model">sale.order</field><!-- Model -->
            <field name="inherit_id" ref="sale.view_order_form"/><!-- External ID -->
            <field name="arch" type="xml">
                <notebook position="inside">
                    <page string="Warehouse Log">
                        <field name="warehouse_log">
                            <tree editable='bottom'>
                                <field name="id"/>
                                <field name="name"/>
                            </tree>
                        </field>

                    </page>
                </notebook>
            </field>
        </record>

    </data>
</odoo>

File "/opt/odoo/odoo/models.py", line 1130, in _validate_fields

    raise ValidationError("%s\n\n%s" % (_("Error while validating constraint"), tools.ustr(e)))

odoo.tools.convert.ParseError: "Error while validating constraint

Field `warehouse_log` does not exist

Error context:

View `sale_order_form_page_warehouse_log`

[view_id: 1585, xml_id: general_options.sale_order_form_page_warehouse_log, model: sale.order, parent_id: 1034]

None" while parsing /opt/odoo/extra_addons/ours/general_options/views/sale_order.xml:5, near