Updated test expiry

ref-test/admin/views.py

@@ -421,8 +421,8 @@ def delete_test():
 def close_test():
     from main import db
     _id = request.get_json()['_id']
-    if db.tests.find_one_and_update({'_id': _id}, {'$set': {'expiry_date': datetime.today() - timedelta(days=1) }}):
-        return Test(_id = _id).delete()
+    if db.tests.find_one({'_id': _id}):
+        return Test(_id = _id, expiry_date= datetime.today() - timedelta(days=1)).update()
     return jsonify({'error': 'Could not find the corresponding test to delete.'}), 404
 
 @views.route('/test/<_id>/', methods=['GET','POST'])