Addition of field 'group based on' in the student attendance tool (#9152)

diff --git a/erpnext/schools/doctype/student_attendance_tool/student_attendance_tool.js b/erpnext/schools/doctype/student_attendance_tool/student_attendance_tool.js
index 6f8c6cd..8fe8f8c 100644
--- a/erpnext/schools/doctype/student_attendance_tool/student_attendance_tool.js
+++ b/erpnext/schools/doctype/student_attendance_tool/student_attendance_tool.js
@@ -3,6 +3,16 @@
 frappe.provide("schools")
 
 frappe.ui.form.on('Student Attendance Tool', {
+	onload: function(frm) {
+		frm.set_query("student_group", function() {
+			return {
+				"filters": {
+					"group_based_on": frm.doc.group_based_on
+				}
+			};
+		});
+	},
+
 	refresh: function(frm) {
 		frm.disable_save();
 	},
diff --git a/erpnext/schools/doctype/student_attendance_tool/student_attendance_tool.json b/erpnext/schools/doctype/student_attendance_tool/student_attendance_tool.json
index 291e027..265ac8c 100644
--- a/erpnext/schools/doctype/student_attendance_tool/student_attendance_tool.json
+++ b/erpnext/schools/doctype/student_attendance_tool/student_attendance_tool.json
@@ -50,6 +50,39 @@
    "bold": 0, 
    "collapsible": 0, 
    "columns": 0, 
+   "default": "Batch", 
+   "depends_on": "eval:doc.based_on == \"Student Group\"", 
+   "fieldname": "group_based_on", 
+   "fieldtype": "Select", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_global_search": 0, 
+   "in_list_view": 0, 
+   "in_standard_filter": 0, 
+   "label": "Group Based On", 
+   "length": 0, 
+   "no_copy": 0, 
+   "options": "Batch\nCourse\nActivity", 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
+   "read_only": 0, 
+   "remember_last_selected_value": 0, 
+   "report_hide": 0, 
+   "reqd": 0, 
+   "search_index": 0, 
+   "set_only_once": 0, 
+   "unique": 0
+  }, 
+  {
+   "allow_bulk_edit": 0, 
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "column_break_2", 
    "fieldtype": "Column Break", 
    "hidden": 0, 
@@ -240,7 +273,7 @@
  "issingle": 1, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2017-05-01 15:09:55.740005", 
+ "modified": "2017-06-05 23:16:43.127216", 
  "modified_by": "Administrator", 
  "module": "Schools", 
  "name": "Student Attendance Tool",