from django.shortcuts import render, redirect,HttpResponse
# Create your views here.
from django.forms import widgets as wid
from django.forms import ModelForm
from .models import *

class BookForm(ModelForm):
class Meta:
model = Book
fields = "__all__"
labels = {"title": "书籍名称", "price": "价格"}
widgets = {
"title": wid.TextInput(attrs={"class": "form-control"}),
"price": wid.TextInput(attrs={"class": "form-control"}),
"date": wid.TextInput(attrs={"class": "form-control", "type": "date"}),
"publish": wid.Select(attrs={"class": "form-control"}),
"authors": wid.SelectMultiple(attrs={"class": "form-control"}),
}
error_messages = {
"title": {"required": "不能为空"}
}

def booklist(request):
book_list = Book.objects.all()
return render(request,"booklist.html",locals())

def add(request):
if request.method == "POST":
form = BookForm(request.POST)
if form.is_valid():
form.save()
return redirect("/booklist/")
else:
return render(request,"add.html",locals())
form = BookForm()
return render(request,"add.html",locals())

def edit(request,edit_book_id):
edit_book = Book.objects.filter(pk=edit_book_id).first()
if request.method == "POST":
form = BookForm(request.POST, instance=edit_book)
if form.is_valid():
form.save() # edit_book.update(request.POST)
return redirect("/booklist/")
form = BookForm(instance=edit_book)
return render(request,"edit.html",locals())

def delete(request,delete_book_id):
if delete_book_id:
Book.objects.filter(pk=delete_book_id).first().delete()
return redirect("/booklist/")
else:
return HttpResponse("数据不存在，出错了")