def clean_isbn(self):
'''Converts the user inputted isbn into a valid ISBN-13, or
raises a validation error if the isbn does not exist or is
incorrectly formatted'''
# check formatting
isbn = cleanisbn(self.cleaned_data['isbn'])
if isbn == '':
raise forms.ValidationError('The ISBN you entered is not valid')
# check if book exists either here at PTX or at amazon
try:
if len(isbn) == 13:
book = Book.objects.get(isbn13=isbn)
elif len(isbn) == 10:
book = Book.objects.get(isbn10=isbn)
except Book.DoesNotExist:
# book does not exist in PTX, so try fetching it from amazon
book = book_details(isbn)
if book == None:
raise forms.ValidationError(
'A book with this ISBN could not be found')
book.save()
return book.isbn13
def clean_isbn(self):
'''Converts the user inputted isbn into a valid ISBN-13, or
raises a validation error if the isbn does not exist or is
incorrectly formatted'''
# check formatting
isbn = cleanisbn(self.cleaned_data['isbn'])
if isbn == '':
raise forms.ValidationError('The ISBN you entered is not valid')
# check if book exists either here at PTX or at amazon
try:
if len(isbn) == 13:
book = Book.objects.get(isbn13=isbn)
elif len(isbn) == 10:
book = Book.objects.get(isbn10=isbn)
except Book.DoesNotExist:
# book does not exist in PTX, so try fetching it from amazon
book = book_details(isbn)
if book == None:
raise forms.ValidationError('A book with this ISBN could not be found')
book.save()
return book.isbn13
def process_add(request, form_data):
'''Returns the added book if add is successful, None if the field is blank,
or raises Book.DoesNotExist if no such book is found'''
form = AddForm(form_data)
if not form.is_valid():
raise Book.DoesNotExist
# Clean up the ISBN, or stop if there has been no ISBN entered
isbn = form.cleaned_data['add']
if len(isbn) == 0: return None
isbn = cleanisbn(isbn)
# Get the book, or raise the exception that it does not exist
if len(isbn) == 13:
try:
book = Book.objects.get(isbn13=isbn)
except Book.DoesNotExist:
book = book_details(isbn)
if book != None: book.save()
else: raise Book.DoesNotExist
elif len(isbn) == 10:
try:
book = Book.objects.get(isbn10=isbn)
except Book.DoesNotExist:
book = book_details(isbn)
if book != None: book.save()
else: raise Book.DoesNotExist
else:
raise Book.DoesNotExist
# Check that the item is not already in the wishlist
user, created = User.objects.get_or_create(net_id=request.user.username)
req_list = Request.objects.filter(user=user,
status='o', book=book)
if len(req_list) > 0:
raise AlreadyInWishlist
req = Request(user=user, book = book, status = 'o', maxprice = 0)
req.save()
return book
def process_add(request, form_data):
'''Returns the added book if add is successful, None if the field is blank,
or raises Book.DoesNotExist if no such book is found'''
form = AddForm(form_data)
if not form.is_valid():
raise Book.DoesNotExist
# Clean up the ISBN, or stop if there has been no ISBN entered
isbn = form.cleaned_data['add']
if len(isbn) == 0: return None
isbn = cleanisbn(isbn)
# Get the book, or raise the exception that it does not exist
if len(isbn) == 13:
try:
book = Book.objects.get(isbn13=isbn)
except Book.DoesNotExist:
book = book_details(isbn)
if book != None: book.save()
else: raise Book.DoesNotExist
elif len(isbn) == 10:
try:
book = Book.objects.get(isbn10=isbn)
except Book.DoesNotExist:
book = book_details(isbn)
if book != None: book.save()
else: raise Book.DoesNotExist
else:
raise Book.DoesNotExist
# Check that the item is not already in the wishlist
user, created = User.objects.get_or_create(net_id=request.user.username)
req_list = Request.objects.filter(user=user, status='o', book=book)
if len(req_list) > 0:
raise AlreadyInWishlist
req = Request(user=user, book=book, status='o', maxprice=0)
req.save()
return book
def search(request):
"""Given a search query argument, treats each token as another
filter on the set of all books. Two types of filters are
recognized: ISBN and strings."""
book_list = Book.objects.all()
st = request.GET.get("s")
if st:
# Progressively whittle down the entire book_list.
for token in st.split():
clean_isbn = cleanisbn(token)
if len(clean_isbn) > 0:
query = Q(isbn13__icontains=clean_isbn)
query = query | Q(isbn10__icontains=clean_isbn)
else:
query = Q(title__icontains=token)
query = query | Q(author__icontains=token)
query = query | Q(course__dept__icontains=token)
query = query | Q(course__num__icontains=token)
book_list = book_list.filter(query)
book_list = book_list.distinct().order_by('title')
showofferings = any(book.hasOfferings() for book in book_list)
showunoffered = any(not book.hasOfferings() for book in book_list)
# Dictionary for displaying stuff on template
data = {
'book_list': book_list,
'showofferings': showofferings,
'showunoffered': showunoffered,
'num_books': len(book_list),
'st': st
}
# Render to template
return render_to_response(request, 'ptx/browsebooks.html', data)
def search(request):
"""Given a search query argument, treats each token as another
filter on the set of all books. Two types of filters are
recognized: ISBN and strings."""
book_list = Book.objects.all()
st = request.GET.get("s")
if st:
# Progressively whittle down the entire book_list.
for token in st.split():
clean_isbn = cleanisbn(token)
if len(clean_isbn) > 0:
query = Q(isbn13__icontains=clean_isbn)
query = query | Q(isbn10__icontains=clean_isbn)
else:
query = Q(title__icontains=token)
query = query | Q(author__icontains=token)
query = query | Q(course__dept__icontains=token)
query = query | Q(course__num__icontains=token)
book_list = book_list.filter(query)
book_list = book_list.distinct().order_by('title')
showofferings = any(book.hasOfferings() for book in book_list)
showunoffered = any(not book.hasOfferings() for book in book_list)
# Dictionary for displaying stuff on template
data = {'book_list': book_list,
'showofferings': showofferings,
'showunoffered': showunoffered,
'num_books': len(book_list),
'st': st}
# Render to template
return render_to_response(request, 'ptx/browsebooks.html', data)
