fixed BUG-12: remove loaned out books from results of search for books to add to a loan

BUGs

@@ -1,11 +1,15 @@
 #### BUGS (next-13)
+
+### DB/back-end
 BUG-2:		series does not deal with calcd_rating... 
 			- (on edit could, recalc as a catch-all, and obviously if we change a single book's rating, we should re-calc)
+BUG-13:		deleting loan fails with book_loan_link data still existing
 
+### UI not updating after DB change:
 BUG-3:		alter a condition, covertype, etc. and its not in drop-down list (even though db look via index is correct, e.g books.html shows updated covertype)
+BUG-7:		if you remove a series from a book, it won't appear in the series drop-down if it is the first 'missing' book in that series -- either reset the list, or show all series always?
 
+### ordering of data in UI:
 BUG-6:		author,series, etc. do not have explicit ordering like sub-books... sort of irritating / needs code and DB fix
 			- add/remove authors, and after save they are ordered by author.id, not order of addition (prob. needs book_author_link to have an auth_num)
 
-BUG-7:		if you remove a series from a book, it won't appear in the series drop-down if it is the first 'missing' book in that series -- either reset the list, or show all series always?
-BUG-12:		remove loaned out books from results of search for books to add to a loan

README

@@ -55,4 +55,3 @@ TODO-19:	icons on wish list, etc.?  (not sure I really want them, but if so)
 TODO-20:	ORM all books load is slow
 			- should I lazy load all books (ajax the 2nd->last pages in, or not use ORM, and do a quick db.execute()....)
 TODO-21:	allow a way to add a book as a child of another existing book (opposite of rem_sub_book)
-

main.py

@@ -230,12 +230,14 @@ book_schema = BookSchema()
 ####################################### ROUTES #######################################
 @app.route("/search", methods=["POST"])
 def search():
-    books = Book.query.filter(Book.title.ilike("%{}%".format(request.form['term']))).all()
-    AddSubs(books)
     if 'InDBox' in request.form:
+		# removes already loaned books from list of books to loan out 
+        books = Book.query.outerjoin(Book_Loan_Link).filter(Book.title.ilike("%{}%".format(request.form['term'])),Book_Loan_Link.loan_id==None).all()
         InDBox=1
     else:
+        books = Book.query.filter(Book.title.ilike("%{}%".format(request.form['term']))).all()
         InDBox=0
+    AddSubs(books)
     return render_template("books.html", books=books, InDBox=InDBox)
 
 @app.route("/books", methods=["GET"])