Question

请帮助我了解如何使删除按钮，它必须删除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 

这是我views.py，希望能帮到你。 （它需要为我的面试周一）

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}) 

网站递增到ADDD更多的细节，但我只是不知道还有什么，我可以补充。

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，你应该创建一个cat_delete来看，这应该是这个样子：

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. 

然后，你应该在你的urls.py映射这样的观点：

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，你应该创建一个与删除按钮，这将简单地发送一个POST请求删除视图：

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

仔细查看对表单的行动：

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

这里我使用的是app_name从urls.py，我以前为了增加通过名字来解决您的网址，而不是路径。现在cats:cat_delete将评估为cats/delete/<pk>。当然你通过cat.id。

这应该会删除Cat模型的实例。希望我帮助。