Fixes for student Attendance
diff --git a/erpnext/schools/doctype/student_attendance/student_attendance.py b/erpnext/schools/doctype/student_attendance/student_attendance.py
index d9949b0..45b3014 100644
--- a/erpnext/schools/doctype/student_attendance/student_attendance.py
+++ b/erpnext/schools/doctype/student_attendance/student_attendance.py
@@ -31,7 +31,8 @@
(self.student, self.course_schedule, self.name))
else:
attendance_records= frappe.db.sql("""select name from `tabStudent Attendance` where \
- student= %s and date= %s and name != %s and course_schedule='' and docstatus=1""",
+ student= %s and date= %s and name != %s and docstatus=1 and \
+ (course_schedule is Null or course_schedule='')""",
(self.student, self.date, self.name))
if attendance_records: