It's strange that with o2m doesn't work because I find that in many2many field seems working... ex. in account.account form I can see (account/account_view.xml file): <field colspan="4" name="tax_ids" nolabel="1" domain="[('parent_id','=',False)]"/>
It's strange that with o2m doesn't work because I find that in many2many field seems working... account_ view.xml file): "[('parent_ id','=' ,False) ]"/>
ex. in account.account form I can see (account/
<field colspan="4" name="tax_ids" nolabel="1" domain=