Hi,
I am working on Sales module, create new Sale Order Line in Sale Order form.
I would like to display "--" instead of blank text in Taxes column when user selected nothing.
I tried this code but it did not work.
<field
name="tax_id"
widget="many2many_tags"
options="{'no_create': True}"
domain="[('type_tax_use','=','sale'),('company_id','=',parent.company_id)]"
attrs="{'readonly': [('qty_invoiced', '>', 0)], 'placeholder': '--'}"
/>
How can I do that? Thank you!