Newsletter email group patch fix

frappe/patches/v8_0/newsletter_childtable_migrate.py

@@ -8,13 +8,17 @@ def execute():
     frappe.reload_doc('email', 'doctype', 'newsletter_email_group')
     frappe.reload_doctype('Newsletter')
 
-    newsletters = frappe.get_all("Newsletter", fields=["name", "email_group"])
+	if "email_group" not in frappe.db.get_table_columns("Newsletter"):
+		return
+		
+	newsletters = frappe.get_all("Newsletter", fields=["name", "email_group"])
     for newsletter in newsletters:
         if newsletter.email_group:
             newsletter_doc = frappe.get_doc("Newsletter", newsletter.name)
-            newsletter_doc.append("email_group", {
-                "email_group": newsletter.email_group,
-            })
-            newsletter_doc.flags.ignore_validate = True
-            newsletter_doc.flags.ignore_mandatory = True
-            newsletter_doc.save()
+			if not newsletter_doc.get("email_group"):
+	            newsletter_doc.append("email_group", {
+	                "email_group": newsletter.email_group,
+	            })
+	            newsletter_doc.flags.ignore_validate = True
+	            newsletter_doc.flags.ignore_mandatory = True
+	            newsletter_doc.save()