add [TOC] to pdf generation

writer/models.py

@@ -21,13 +21,15 @@ class Section(models.Model):
 
 
 def to_pdf():
-    x = ''
+    x = '[TOC]\n'
+
     for section in Section.objects.all():
         x += '# ' + section.title
         x += '\n'
         x += section.content
         x += '\n'
-    html = Markdown().convert(x)
+    md = Markdown(extensions=['markdown.extensions.toc'])
+    html = md.convert(x)
 
     options = {
         'page-size': 'Letter',