fix comment handling

temp_index.py

@@ -1,5 +1,7 @@
 """Generates PDF cards from a calibre metadata.db."""
 
+from textwrap import shorten
+
 from calibrestekje import Book, Comment, Publisher, init_session
 from reportlab.lib.pagesizes import *
 from reportlab.lib.styles import ParagraphStyle, getSampleStyleSheet
@@ -21,8 +23,6 @@ def get_fields(db_path, fields):
     session = init_session(db_path)
 
     for book in session.query(Book).all():
-        for comment in session.query(Comment).all():
-
         if "title" in fields:
             tag = "<font size=12>{}</font>".format(book.title)
             ptitle = Paragraph(tag, styles["Italic"])
@@ -36,7 +36,13 @@ def get_fields(db_path, fields):
             content.append(Spacer(1, 12))
 
         if "comments" in fields:
-                tag = "<font size=10>{}</font>".format(comment.text)
+            comments = ", ".join(
+                [
+                    shorten(comment.text, width=50, placeholder="...")
+                    for comment in book.comments
+                ]
+            )
+            tag = "<font size=10>{}</font>".format(comments)
             pcomments = Paragraph(tag)
             content.append(pcomments)