from django.shortcuts import HttpResponse, render, redirect
from app01 import models
# Create your views here.
# show the list of publishers
def publisher_list(request):
# Go to the database to find out all the publishers, fill in the HTML, and return to the user
ret = models.Publisher.objects.all().order_by("id")
return render(request, "publisher_list.html", {"publisher_list": ret})
# add new publisher
def add_publisher(request):
error_msg = ""
# If it is a POST request, I will get the data filled in by the user
if request.method == "POST":
new_name = request.POST.get("publisher_name", None)
if new_name:
# Create a new record in the database through ORM
models.Publisher.objects.create(name=new_name)
# Guide the user to visit the publisher list page to see if the addition is successful --> Jump
return redirect("/publisher_list/")
else:
error_msg = "Publisher name cannot be empty!"
# The first time the user comes, I return him an HTML page to fill in
return render(request, "add_publisher.html", {"error": error_msg})
# delete the function of the publisher
def delete_publisher(request):
print(request.GET)
print("=" * 120)
# delete the specified data
# 1. Get the ID value of the data to be deleted from the parameters of the GET request
del_id = request.GET.get("id", None) # Dictionary value, if you can't marry, the default is None
# If you can get the id value
if del_id:
# Go to the database to delete the data with the current id value
# Find the data based on the id value
del_obj = models.Publisher.objects.get(id=del_id)
# delete
del_obj.delete()
# Return to the deleted page, jump to the publisher's list page, and check whether the deletion is successful
return redirect("/publisher_list/")
else:
return HttpResponse("The data to be deleted does not exist!")
# Editing Press
def edit_publisher(request):
# After the user has modified the name of the publisher, click the submit button and send me the new publisher name
if request.method == "POST":
print(request.POST)
# Get the new publisher name
edit_id = request.POST.get("id")
new_name = request.POST.get("publisher_name")
# update publisher
# Get which publisher is the editor based on id
edit_publisher = models.Publisher.objects.get(id=edit_id)
edit_publisher.name = new_name
edit_publisher.save() # commit the changes to the database
# Jump to the publisher list page to see if the modification is successful
return redirect("/publisher_list/")
# Get the id parameter from the URL of the GET request
edit_id = request.GET.get("id")
if edit_id:
# Get the publisher object of the current editor
publisher_obj = models.Publisher.objects.get(id=edit_id)
return render(request, "edit_publisher.html", {"publisher": publisher_obj})
else:
return HttpResponse("Edited publisher does not exist!")
# show the list of books
def book_list(request):
# Go to the database to query all books
all_book = models.Book.objects.all()
# Complete string replacement on HTML page (render data)
return render(request, "book_list.html", {"all_book": all_book})
# delete books
def delete_book(request):
# Get the id value of the book to be deleted from the URL
delete_id = request.GET.get("id") # Get data from URL
# To delete the data in the database to delete the specified id
models.Book.objects.get(id=delete_id).delete()
# Return to the book list page to see if the deletion is successful
return redirect("/book_list/")
# add books
def add_book(request):
if request.method == "POST":
print(request.POST)
print("=" * 120)
# {"book_title": "Learn to drive with Boss Jin", "publisher": 9}
new_title = request.POST.get("book_title")
new_publisher_id = request.POST.get("publisher")
# Create a new book object and submit it automatically
models.Book.objects.create(title=new_title, publisher_id=new_publisher_id)
# Create with publisher object
# publisher_obj = models.Publisher.objects.get(id=new_publisher_id)
# models.Book.objects.create(title=new_title, publisher=publisher_obj)
# Return to book list page
return redirect("/book_list/")
# Get all publishers
ret = models.Publisher.objects.all()
return render(request, "add_book.html", {"publisher_list": ret})
# edit books
def edit_book(request):
if request.method == "POST":
# Take from the submitted data, the title of the book and the publisher associated with the book
edit_id = request.POST.get("id")
new_title = request.POST.get("book_title")
new_publisher_id = request.POST.get("publisher")
# renew
edit_book_obj = models.Book.objects.get(id=edit_id)
edit_book_obj.title = new_title # Update book title
edit_book_obj.publisher_id = new_publisher_id # Update the publisher associated with the book
# Commit the changes to the database
edit_book_obj.save()
# Return to the book list page to see if the editing is successful
return redirect("/book_list/")
# Return to a page for users to edit book information
# Get the id value of the edited book
edit_id = request.GET.get("id")
# According to the id, go to the database to get the specific book object
edit_book_obj = models.Book.objects.get(id=edit_id)
print(edit_book_obj.id)
print(edit_book_obj.title)
print(edit_book_obj.publisher) # Get the publisher object associated with the current book object
print(edit_book_obj.publisher_id) # Get the id value of the publisher associated with the current book object
ret = models.Publisher.objects.all()
return render(
request,
"edit_book.html",
{"publisher_list": ret, "book_obj": edit_book_obj}
)
# Author list
def author_list(request):
# author_obj = models.Author.objects.get(id=1)
# print(author_obj.book.all())
# print("=" * 120)
# Query all authors
all_author = models.Author.objects.all()
return render(request, "author_list.html", {"author_list": all_author})
# add author
def add_author(request):
if request.method == "POST":
print("in post...")
# Get the submitted data
new_author_name = request.POST.get("author_name")
# When the data submitted by post is multiple values, getlist must be used, such as multi-select checkbox and multi-select select
books = request.POST.getlist("books")
# create author
new_author_obj = models.Author.objects.create(name=new_author_name)
# Create a corresponding relationship between new authors and books and submit them automatically
new_author_obj.book.set(books)
# Jump to the author list page to see if the addition is successful!
return redirect("/author_list/")
# Query all books
ret = models.Book.objects.all()
return render(request, "add_author.html", {"book_list": ret})
# delete author
def delete_author(request):
# Get the author id to delete from the URL
delete_id = request.GET.get("id")
#Get the author object to be deleted according to the ID value and delete it directly
# 1. Go to the author table and delete the author
# 2. Go to the association table of author and book and delete the corresponding association record
models.Author.objects.get(id=delete_id).delete()
# Return to author list page
return redirect("/author_list/")
# edit author
def edit_author(request):
# If you are done editing, submit the data
if request.method == "POST":
# Get the edited data submitted
edit_author_id = request.POST.get("author_id")
new_author_name = request.POST.get("author_name")
# Get the book information associated with the author after editing
new_books = request.POST.getlist("books")
# Find the currently edited author object by ID
edit_author_obj = models.Author.objects.get(id=edit_author_id)
# update the author's name
edit_author_obj.name = new_author_name
# Update the correspondence of the book associated with the author
edit_author_obj.book.set(new_books)
# Commit the changes to the database
edit_author_obj.save()
# Return to the author list page to see if the editing is successful
return redirect("/author_list/")
# Get the id information of the author to be edited from the URL
edit_id = request.GET.get("id")
# Find the author object to edit
edit_author_obj = models.Author.objects.get(id=edit_id)
# Query all book objects
ret = models.Book.objects.all()
return render(request, "edit_author.html", {"book_list": ret, "author": edit_author_obj})
def test(request):
print(request.GET)
print(request.GET.get("id"))
return HttpResponse("OK")
# Book review code
def book_test(request):
# Query all books
# book_list = models.Book.objects.all()
# # print(book_list)
# for i in book_list:
# print(i)
# print(i.title)
# print(i.publisher)
# print(i.publisher.name)
# print(i.publisher.addr)
# print("=" * 20)
# add new book
# new_book_obj = models.Book.objects.create(
# title="Name of new book",
# publisher_id=10
# )
# add new book
publisher_obj = models.Publisher.objects.get(id=10)
new_book_obj = models.Book.objects.create(
title="Name of the new book 2",
publisher=publisher_obj
)
print(new_book_obj)
return HttpResponse("o98k")