How to use frappe.db.get_value in Print Format

[Gavin_Ji]

can anyone check my post here

Print issue {{ frappe.db.get_value("Customer", doc.customer, "tax_id") }}

i using TRN#: {{ frappe.db.get_value(“Customer”, doc.customer, “tax_id”) }} and Customer#:{{ frappe.db.get_value(“Customer”, doc.customer, “customer_code”) }} They are displaying in erpnext like [44] But when i output pdf, these two fields display “None” [59] How to make the value can be displayed in pdf. My system is: ERPNext: v11.1.44 (master) Frappe Framework: v11.1.39 (master)

in pdf, frappe.get_value, cannot display.

Is there any solution?