def validate_order_type(self):
		valid_types = ["Sales", "Maintenance", "Shopping Cart"]
		if not self.doc.order_type:
			self.doc.order_type = "Sales"
		elif self.doc.order_type not in valid_types:
			msgprint(_(self.meta.get_label("order_type")) + " " + 
				_("must be one of") + ": " + comma_or(valid_types), raise_exception=True)

	def validate(self):
		if self.doc.buying_or_selling not in ["Buying", "Selling"]:
			msgprint(_(self.meta.get_label("buying_or_selling")) + " " + _("must be one of") + " " +
				comma_or(["Buying", "Selling"]), raise_exception=True)
				
		# at least one territory
		self.validate_table_has_rows("valid_for_territories")

    def validate_leave_approver(self):
        employee = webnotes.bean("Employee", self.doc.employee)
        leave_approvers = [l.leave_approver for l in employee.doclist.get({"parentfield": "employee_leave_approvers"})]

        if len(leave_approvers) and self.doc.leave_approver not in leave_approvers:
            msgprint(
                (
                    "["
                    + _("For Employee")
                    + ' "'
                    + self.doc.employee
                    + '"] '
                    + _("Leave Approver can be one of")
                    + ": "
                    + comma_or(leave_approvers)
                ),
                raise_exception=InvalidLeaveApproverError,
            )

        elif self.doc.leave_approver and not webnotes.conn.sql(
            """select name from `tabUserRole` 
			where parent=%s and role='Leave Approver'""",
            self.doc.leave_approver,
        ):
            msgprint(
                get_fullname(self.doc.leave_approver) + ": " + _("does not have role 'Leave Approver'"),
                raise_exception=InvalidLeaveApproverError,
            )

 def validate_purpose(self):
     valid_purposes = [
         "Material Issue",
         "Material Receipt",
         "Material Transfer",
         "Manufacture/Repack",
         "Subcontract",
         "Sales Return",
         "Purchase Return",
     ]
     if self.doc.purpose not in valid_purposes:
         msgprint(_("Purpose must be one of ") + comma_or(valid_purposes), raise_exception=True)

	def validate(self):
		if self.doc.buying_or_selling not in ["Buying", "Selling"]:
			msgprint(_(self.meta.get_label("buying_or_selling")) + " " + _("must be one of") + " " +
				comma_or(["Buying", "Selling"]), raise_exception=True)
				
		if not self.doclist.get({"parentfield": "valid_for_territories"}):
			# if no territory, set default territory
			if webnotes.defaults.get_user_default("territory"):
				self.doclist.append({
					"doctype": "Applicable Territory",
					"parentfield": "valid_for_territories",
					"territory": webnotes.defaults.get_user_default("territory")
				})
			else:
				# at least one territory
				self.validate_table_has_rows("valid_for_territories")

def validate_status(status, options):
	if status not in options:
		msgprint(_("Status must be one of ") + comma_or(options), raise_exception=True)