Fix table.

biscuit/apps/chronos/tables.py

@@ -6,8 +6,8 @@ class LessonsTable(tables.Table):
     class Meta:
         attrs = {'class': 'table table-striped table-bordered table-hover table-responsive-xl'}
 
-    period__period = tables.Column()
-    lesson__groups = tables.Column()
-    lesson_teachers = tables.Column()
-    lesson_subject = tables.Column()
-    room = tables.Column()
+    period__period = tables.Column(accessor='period.period')
+    lesson__groups = tables.Column(accessor='lesson.groups')
+    lesson__teachers = tables.Column(accessor='lesson.teachers')
+    lesson__subject = tables.Column(accessor='lesson.subject')
+    room = tables.Column(accessor='room')