def book_recommendations(request):
'''
View to render book recommendations
Count Vectorizer Approach:
1. Get Ratings of User
2. Shuffle by Top Ratings(For Randomness each time)
3. Recommend according to Top Rated Book
'''
user_ratings = list(UserRating.objects.filter(user=request.user).order_by('-bookrating'))
random.shuffle(user_ratings)
best_user_ratings = sorted(user_ratings, key=operator.attrgetter('bookrating'), reverse=True)
if len(best_user_ratings) < 4:
messages.info(request, 'Please rate atleast 5 books')
return redirect('index')
if best_user_ratings:
# If one or more book is rated
bookid = best_user_ratings[0].bookid
already_rated_books = set(get_rated_bookids(user_ratings))
# Get bookids based on Count Vectorizer
cv_bookids = set(count_vectorizer_recommendations(bookid))
# Shuffle again for randomness for second approach
random.shuffle(user_ratings)
best_user_ratings = sorted(user_ratings, key=operator.attrgetter('bookrating'), reverse=True)
# Get Top 10 bookids based on embedding
embedding_bookids = set(embedding_recommendations(best_user_ratings))
best_bookids = combine_ids(cv_bookids, embedding_bookids, already_rated_books)
all_books_dict = get_book_dict(best_bookids)
else:
return redirect('index')
return render(request, 'mainapp/recommendation.html', {'books': all_books_dict})
def SaveList(request):
"""View to render Saved books page"""
user_ratings = list(
UserRating.objects.filter(user=request.user).order_by('-bookrating'))
rated_books = set(get_rated_bookids(user_ratings))
book = set(
SaveForLater.objects.filter(user=request.user).values_list('bookid',
flat=True))
book_id = list(book)
for i in range(len(book_id)):
if book_id[i] in rated_books:
saved_book = SaveForLater.objects.filter(user=request.user,
bookid=book_id[i])
saved_book.delete()
book_id.remove(book_id[i])
if len(book_id) == 0:
messages.info(request, 'Please Add Some Books')
return redirect('index')
books = get_book_dict(book_id)
total_books = len(books)
paginator = Paginator(books, 10)
page_number = request.GET.get('page')
page_obj = paginator.get_page(page_number)
return render(request, 'mainapp/saved_book.html', {
'page_obj': page_obj,
'num': total_books
})
def save_book(request):
"""AJAX request when user saves book"""
if request.method == 'POST' and request.is_ajax():
bookid = request.POST.get('bookid', None)
user_ratings = list(UserRating.objects.filter(user=request.user))
rated_books = set(get_rated_bookids(user_ratings))
if is_bookid_invalid(bookid) or bookid in rated_books:
return JsonResponse({'success': False}, status=200)
SaveForLater.objects.create(user=request.user, bookid=bookid)
return JsonResponse({'success': True}, status=200)
def read_books(request):
"""View To Render Library Page"""
user_ratings = list(UserRating.objects.filter(user=request.user).order_by('-bookrating'))
if len(user_ratings) == 0:
messages.info(request, 'Please rate some books')
return redirect('index')
if user_ratings:
rated_books = set(get_rated_bookids(user_ratings))
books = get_book_dict(rated_books)
num = len(books)
# Add pagination to the page showing 10 books
paginator = Paginator(books, 10)
page_number = request.GET.get('page')
page_obj = paginator.get_page(page_number)
else:
return redirect('index')
return render(request, 'mainapp/read.html', {'page_obj': page_obj, 'num': num})