我有一個問題：我想更新特定數據/產品，但無法使用get_object_or_404views.pyfrom django.shortcuts import render,get_object_or_404from django.http import HttpResponseRedirect, HttpResponsefrom django.urls import reversefrom django.contrib import messagesfrom django.views.generic import ( UpdateView, DeleteView)from product.models import Productfrom pages.forms import ProductFormdef ProductUpdateView(request, pk): # queryset = Product.objects.all()[0].pk_id <-- I tried this # queryset = Product.objects.get() <-- and this queryset = Product.objects.all() product1 = get_object_or_404(queryset, pk=pk) #product1 = get_object_or_404(Product, pk=pk) <-- and this if request.method == 'POST': productUpdate_form = ProductForm(data=request.POST,files=request.FILES,instance=request.product1)) # Check to see the form is valid if productUpdate_form.is_valid(): # and profile_default.is_valid() : # Sava o produto productUpdate_form.save() # Registration Successful! messages.success messages.success(request, 'Produto Modificado com Sucesso') #Go to Index return HttpResponseRedirect(reverse('index')) else: # One of the forms was invalid if this else gets called. print(productUpdate_form.errors) else: # render the forms with data. productUpdate_form = ProductForm(instance=request.product1) context = {'productUpdate_form': productUpdate_form,} return render(request, 'base/update.html',context)urls.pyfrom django.urls import include, pathfrom pages.views import (ProductListView, ProductUpdateView, ProductDeleteView)服務器時間：2020年10月1日星期四21:36:44 -0300。因此，我無法比較get_object_or_404中的pk，我需要它來找到并使用特定的數據/產品。還有什么其他方法可以使用get_object_or_404或比較 link/pk 和 data/product ？請幫助。
2 回答
慕村225694
TA貢獻1880條經驗 獲得超4個贊
問題出在：
productUpdate_form = ProductForm(instance=request.product1)
不request包含product1屬性，您只需傳遞product1對象即可：
from django.shortcuts import render, get_object_or_404, redirect
from django.http import HttpResponseRedirect, HttpResponse
from django.contrib import messages
from django.views.generic import (
UpdateView,
DeleteView
)
from product.models import Product
from pages.forms import ProductForm
def ProductUpdateView(request, pk):
product1 = get_object_or_404(Product, pk=pk)
if request.method == 'POST':
productUpdate_form = ProductForm(data=request.POST,files=request.FILES,instance=product1))
# Check to see the form is valid
if productUpdate_form.is_valid(): # and profile_default.is_valid() :
# Sava o produto
productUpdate_form.save()
# Registration Successful! messages.success
messages.success(request, 'Produto Modificado com Sucesso')
#Go to Index
return redirect('index')
else:
# One of the forms was invalid if this else gets called.
print(productUpdate_form.errors)
else:
# render the forms with data.
productUpdate_form = ProductForm(instance=product1)
context = {'productUpdate_form': productUpdate_form,}
return render(request, 'base/update.html',context)
然而，這不是一個UpdateView：這不是一個基于類的視圖，并且它不是從UpdateView.
注意：函數通常用Snake_case編寫，而不是PerlCase，因此建議將函數重命名為product_update_view, not ProductUpdateView。
吃雞游戲
TA貢獻1829條經驗 獲得超7個贊
最好使用 ClassView
# views.py
from django.views.generic.edit import UpdateView
from product.models import Product
from django.contrib import messages
from pages.forms import ProductForm
class ProductUpdateView(UpdateView):
? ? model = Product
? ? form_class = ProductForm
? ? template_name = 'base/update.html'
? ? def form_valid(self, form):
? ? ? ? self.object = form.save()
? ? ? ? messages.success(self.request, 'Produto Modificado com Sucesso')
? ? ? ? return redirect('index')
?
? ? def get_context_data(self, **kwargs):
? ? ? ? if 'productUpdate_form' not in kwargs:
? ? ? ? ? ? kwargs['productUpdate_form'] = self.get_form()
? ? ? ? return super().get_context_data(**kwargs)
? ? ? ? ?
# urls.py
from django.urls import include, path
from pages.views import (ProductListView,
? ? ? ? ? ? ? ? ? ? ? ? ProductUpdateView,
? ? ? ? ? ? ? ? ? ? ? ? ProductDeleteView)
urlpatterns = [
? ? path('listProduct/', ProductListView, name='listProduct'),
? ? path('<int:pk>/update/', ProductUpdateView.as_view(), name='product-update'),
]
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