make AddSub so we can call it in search and books, and dont use -1 array index as it breaks AddSubs - remember it is the last element in dict, so it was overwriting data

main.py

@@ -192,8 +192,20 @@ def GetBookIdFromBookSubBookLinkByIdAndSubBookNum( book_id, sub_book_num ):
     tmp_bsbl = Book_Sub_Book_Link.query.filter(Book_Sub_Book_Link.book_id==book_id, Book_Sub_Book_Link.sub_book_num==sub_book_num ).all()
     return tmp_bsbl[0].sub_book_id
 
+# ignore ORM, the sub_book_num comes from the link, but does not have any attached data, so can't tell which book it connects to.  
+# Just select sub_book data and hand add it to the books object, and use it in jinja2 to indent/order the books/sub books
+# This data is used to sort/indent subbooks
+def AddSubs(books):
+    subs = db.engine.execute ( "select * from book_sub_book_link" )
+    for row in subs:
+       index = next((i for i, item in enumerate(books) if item.id == row.sub_book_id), -1)
+       if index == -1:
+	       continue
+       books[index].parent_id = row.book_id
+       books[index].sub_book_num = row.sub_book_num
+
 ####################################### GLOBALS #######################################
-# allow jinja2 to call this python function
+# allow jinja2 to call these python functions directly
 app.jinja_env.globals['GetCovertypeById'] = GetCovertypeById
 app.jinja_env.globals['GetOwnedById'] = GetOwnedById
 app.jinja_env.globals['GetConditionById'] = GetConditionById
@@ -201,30 +213,19 @@ app.jinja_env.globals['GetPublisherById'] = GetPublisherById
 app.jinja_env.globals['SeriesBookNum'] = SeriesBookNum
 app.jinja_env.globals['ClearStatus'] = st.ClearMessage
 
-### DDP: do I need many=True on Author as books have many authors? (or in BookSchema declaration above?)
 book_schema = BookSchema()
 
 ####################################### ROUTES #######################################
 @app.route("/search", methods=["POST"])
 def search():
-    print( "term={}".format( request.form['term']) )
     books = Book.query.filter(Book.title.ilike("%{}%".format(request.form['term']))).all()
-    print( books )
+    AddSubs(books)
     return render_template("books.html", books=books)
 
 @app.route("/books", methods=["GET"])
 def books():
     books = Book.query.all()
-
+    AddSubs(books)
-    # ignore ORM, the sub_book_num comes from the link, but does not have any attached data, so can't tell which book it connects to.  
-    # Just select sub_book data and hand add it to the books object, and use it in jinja2 to indent/order the books/sub books
-    # This data is used to sort/indent subbooks
-    subs = db.engine.execute ( "select * from book_sub_book_link" )
-    for row in subs:
-       index = next((i for i, item in enumerate(books) if item.id == row.sub_book_id), -1)
-       books[index].parent_id = row.book_id
-       books[index].sub_book_num = row.sub_book_num
-
     return render_template("books.html", books=books )
 
 @app.route("/books_for_loan/<id>", methods=["GET"])