Resolve "[Lesson substitution] View with all lesson substitutions in the future"

Closes #11 (closed)

biscuit/apps/chronos/tables.py

@@ -37,10 +37,9 @@ class SubstitutionsTable(tables.Table):
     class Meta:
         attrs = {'class': 'table table-striped table-bordered table-hover table-responsive-xl'}
 
-    week = tables.Column(accessor='week')
-    lesson_period = tables.Column(verbose_name=_('Lesson'))
-    lesson__groups = tables.Column(accessor='lesson_period.lesson.group_names', verbose_name=_('Groups'))
-    lesson__teachers = tables.Column(accessor='lesson_period.get_teacher_names', verbose_name=_('Teachers'))
-    lesson__subject = tables.Column(accessor='subject')
-    room = tables.Column(accessor='room')
-    cancelled = tables.BooleanColumn(accessor='cancelled', verbose_name=_('Cancelled'))
+    lesson_period = tables.Column(verbose_name=_('Lesson'), accessor='substitutions.last.lesson_period')
+    lesson__groups = tables.Column(accessor='substitutions.last.lesson_period.lesson.group_names', verbose_name=_('Groups'))
+    lesson__teachers = tables.Column(accessor='substitutions.last.lesson_period.get_teacher_names', verbose_name=_('Teachers'))
+    lesson__subject = tables.Column(accessor='substitutions.last.subject')
+    room = tables.Column(accessor='substitutions.last.room')
+    cancelled = tables.BooleanColumn(accessor='substitutions.last.cancelled', verbose_name=_('Cancelled'))