def process_edit(isbn):
# step 1. retrieve all books in the .csv file in a list
all_books = read_books()
# step 2. find the book that we have changed
changed_book = find_book_generic(isbn)
print(changed_book)
# step 3. update the changed book to match the form
changed_book['title'] = request.form.get('book_title')
changed_book['author'] = request.form.get('author')
changed_book['year_published'] = request.form.get('year-published')
# step 4. overwrite the book information in the list
for index in range(0, len(all_books)):
if all_books[index]['isbn'] == changed_book['isbn']:
all_books[index] = changed_book
# step 5. write the entire list back to the csv file
with open('books.csv', 'w', newline="\n") as fp:
writer = csv.writer(fp, delimiter=",")
# write in the header
writer.writerow(['isbn', 'title', 'author', 'year_published'])
for b in all_books:
writer.writerow(
[b['isbn'], b['title'], b['author'], b['year_published']])
return redirect(url_for('read_book'))
def test_save_book():
library = data.modify_book('9780316038379', 'Twilight 2',
'Meyer Stephenie 2', '1/1/2020')
data.save(library) # save to file
books = data.read_books()
assert books[3]['title'] == 'Twilight 2'
assert books[3]['author'] == 'Meyer Stephenie 2'
assert books[3]['year_published'] == '1/1/2020'
def process_delete(isbn, title):
#step 1. put all books from csv into a list
all_books = read_books()
#step 2. find the book to be deleted
book_to_delete = find_book_generic(isbn)
#step 3. find the item to be deleted in the all_books list & delete it
for index in range(len(all_books)):
if book_to_delete['isbn'] == all_books[index]['isbn']:
del all_books[index]
break
#4. write back the list to the file
write_to_file(all_books)
return redirect(url_for('read_book'))
def test_read_books_from_file():
library = data.read_books()
assert len(library) == 5
assert library[0]['title'] == 'The Lord of the Rings'
assert library[2]['title'] == 'Children of Dune'
assert library[-1]['title'] == 'Charlie and the Chocolate Factory'
def select_book_to_edit():
# Get all books into a list
all_books = read_books()
return render_template('books/select_book.template.html', books=all_books)
def select_to_delete():
all_books = read_books()
return render_template('/books/show_delete.template.html', books=all_books)
def read_book():
all_books = read_books()
return render_template('index.template.html', books=all_books)
def index():
library = data.read_books()
return render_template('index.template.html', library=library)