I have something like this in a wizard:

class SaleOrderLine():
    _inherit = 'sale.order.line'
    boolean_field = fields.Boolean(compute='_compute_boolean_field', store=True)

    @api.depends('product_id', 'qty')
    def _compute_boolean_field(self):
        self.flush_recordset()
        # execute query that uses the each recordset's product_id qty
        # loop and update boolean_field

My issue is when I'm updating sale.order.line from the parent(sale.order) in the UI, the query does not work with my recent change to product_id and so the boolean_field computation is wrong despite flush_recordset()(and all other forms of flushes even self.env.cr.commit()). 

How do I force the UI changes on sale.order.line to the database before the user saves the record so the query works as expected?