对 'entrypage' 进行反转，没有未找到的参数。尝试了 1 种模式：['wiki/(?P<title>[^/]+)$']

Question

VIEWS.PY
from django.shortcuts import render
from django.shortcuts import redirect
from django.urls import reverse
from django.http import HttpResponseRedirect
from django import forms
import markdown2

from . import util

class AddPageForm(forms.Form):
    title = forms.CharField(max_length=20)
    content = forms.CharField(widget=forms.Textarea(
        attrs={
            "class": "form-control",
            "placeholder": "Tell us more!"
        })
    )


def add_page(request):
    if request.method == "POST":
        form = AddPageForm(request.POST)
        entries = util.list_entries()
    
    if form.is_valid():
        title = form.cleaned_data['title']
        content = form.cleaned_data['content']
        util.save_entry(title, content)
        
        for entry in entries:
            if title.upper() == entry.upper():
                return render(request, "encyclopedia/errorpage.html")
            else:
                return HttpResponseRedirect(reverse('encyclopedia:entrypage'))
else:
    return render(request, "encyclopedia/addpage.html", {
        "form": AddPageForm()
    })

URLS.PY

app_name = "encyclopedia"

urlpatterns = [
    path("", views.index, name="index"),
    path("wiki/<str:title>", views.entry_page, name="entrypage"),
    path("search", views.search, name="search"),
    path("add_page", views.add_page, name="addpage"),
]

ADDPAGE.HTML

        <form action="{% url 'encyclopedia:addpage' %}" method="post">
        {% csrf_token %}
        {{ form }}
        <input type="submit" value="Submit" class="btn btn-secondary">
    </form>

LAYOUT.HTML

                <div>
                <a href="{% url 'encyclopedia:addpage' %}">Create New Page</a>
            </div>
            <div>

我已经尝试更新 url 和对此的视图，但我不断收到错误响应

    path("add_page/<str:title>", views.add_page, name="addpage"),
    def add_page(request, title):

请告知此错误响应可能来自何处，因为上述编辑是我在其他一些用于清除错误的 Whosebug 响应中看到的，但这对我不起作用。

谢谢

Answer 1

当您重定向到 entrypage 时，您需要指定标题，因此：

from django.shortcuts import <strong>redirect</strong>

def add_page(request):
    if request.method == "POST":
        form = AddPageForm(request.POST)
        entries = util.list_entries()
        if form.is_valid():
            title = form.cleaned_data['title']
            content = form.cleaned_data['content']
            util.save_entry(title, content)
        
            for entry in entries:
                if title.upper() == entry.upper():
                    return render(request, "encyclopedia/errorpage.html")
            #                                   specify title ↓
            return redirect('encyclopedia:entrypage'<strong>, title=title</strong>)
    # …

我还强烈建议使用数据库，并且不要从实用程序中获取所有条目：数据库经过优化以有效搜索，而访问文件列表需要线性时间来搜索。如果您定义了一个数据库模型，您可以添加 db_index=True [Django-doc] 来构建一个可以极大地提高搜索速度的索引。

对 'entrypage' 进行反转，没有未找到的参数。尝试了 1 种模式：['wiki/(?P<title>[^/]+)$']

Reverse for 'entrypage' with no arguments not found. 1 pattern(s) tried: ['wiki/(?P<title>[^/]+)$']

django

django-views

django-forms

django-templates