Question

請幫助我瞭解如何使刪除按鈕，它必須刪除Cat

class Cat(models.Model): 
    class Meta(): 
     db_table = "cat" 

    paw = models.IntegerField(default=4) 
    name = models.CharField(max_length=30, null=False, default='Cat') 
    age = models.IntegerField(default=False, null=False) 
    species = models.CharField(max_length=50, blank=True) 
    hairiness = models.IntegerField(default=False, null=False) 

    def __str__(self): 
     return self.name 

這是我views.py，希望能幫到你。 （它需要爲我的面試週一）

from django.shortcuts import render, get_object_or_404 
from .models import Cat 
from .forms import CatForm 
from django.shortcuts import redirect 

def home(request): 
    template = "base.html" 
    queryset = Cat.objects.all() 
    context = { 
     "object_list": queryset 
    } 
    return render(request, template, context) 

def new_cat(request): 
    if request.method == "POST": 
     form = CatForm(request.POST) 
     if form.is_valid(): 
      cat = form.save(commit=False) 
      cat.save() 
      return redirect('/', pk=cat.pk) 
    else: 
     form = CatForm() 
    return render(request, 'new_cat.html', {'form': form}) 

def cat_edit(request, pk): 
    cat = get_object_or_404(Cat, pk=pk) 
    if request.method == "POST": 
     form = CatForm(request.POST, instance=cat) 
     if form.is_valid(): 
      cat = form.save(commit=False) 
      cat.save() 
      return redirect('/', pk=cat.pk) 
    else: 
     form = CatForm(instance=cat) 
    return render(request, 'new_cat.html', {'form': form}) 

網站遞增到ADDD更多的細節，但我只是不知道還有什麼，我可以補充。

from django.conf.urls import url 
from . import views 


urlpatterns = [ 
    url(r'^$', views.home, name='home'), 
    url(r'^new/$', views.new_cat, name='new_cat'), 
    url(r'^edit/(?P<pk>[0-9]+)/$', views.cat_edit, name='cat_edit'), 
] 

Answer 1

首先，你應該創建一個cat_delete來看，這應該是這個樣子：

def cat_delete(request, pk): 
    cat = get_object_or_404(Cat, pk=pk) # Get your current cat 

    if request.method == 'POST':   # If method is POST, 
     cat.delete()      # delete the cat. 
     return redirect('/')    # Finally, redirect to the homepage. 

    return render(request, 'template_name.html', {'cat': cat}) 
    # If method is not POST, render the default template. 
    # *Note*: Replace 'template_name.html' with your corresponding template name. 

然後，你應該在你的urls.py映射這樣的觀點：

from django.conf.urls import url 
from . import views 

app_name = 'cats' 
# Note that app_name is added here! 
# It is used as a namespace in order to reverse your urls better. 
# See usage in template. 

urlpatterns = [ 
    # ... 
    url(r'^delete/(?P<pk>[0-9]+)/$', views.cat_delete, name='cat_delete') 
] 

在你的模板，你應該創建一個與刪除按鈕，這將簡單地發送一個POST請求刪除視圖：

<form action="{% url 'cats:cat_delete' cat.id %}" method="post"> 
    {% csrf_token %} 
    <input type="submit" value="Delete cat"> 
</form> 

仔細查看對錶單的行動：

{% url 'cats:cat_delete' cat.id %} 

這裏我使用的是app_name從urls.py，我以前爲了增加通過名字來解決您的網址，而不是路徑。現在cats:cat_delete將評估爲cats/delete/<pk>。當然你通過cat.id。

這應該會刪除Cat模型的實例。希望我幫助。