Remove useless methods

courses/models.py

@@ -214,9 +214,6 @@ class Course(models.Model):
                 lessons.append(lesson)
         return lessons
 
-    def last_public_lesson(self):
-        return published
-
     def first_lesson(self):
         if self.lessons.exists():
             return self.lessons.all()[0]
@@ -539,16 +536,6 @@ class CourseStudent(models.Model):
 
                 return None
 
-                #next_lesson = self.course.lessons.filter(
-                #    position__gt=last_unit_done.unit.lesson.position,
-                #    status='published').order_by(
-                #    'position').first()
-                #if next_lesson and next_lesson.first_unit():
-                #    return next_lesson.units.order_by('position').first()
-                #else:
-                #    return self.course.first_lesson().first_unit()
-
-
         except StudentProgress.DoesNotExist:
             first_lesson = self.course.first_lesson()
             if first_lesson:
@@ -973,19 +960,6 @@ class Lesson(PositionedModel):
         lessons = list(self.course.public_lessons)
         return len(lessons) > 0 and self == lessons[-1]
 
-    @property
-    def public_units(self):
-        units = []
-        for unit in self.units.all():
-            if unit.status == 'draft':
-                if unit.release_date and unit.release_date <= timezone.now():
-                    unit.status = 'published'
-                    unit.save()
-                    units.append(lesson)
-            else:
-                units.append(unit)
-        return units
-
     def __str__(self):
         return self.name