python - ValueError at/posts/create/invalidliteral for int() with base 10 : 'create' in django Form

Question

我正在尝试在 django 中制作 Django 表单，但这给了我类似这样的错误。

ValueError at /posts/create/ invalid literal for int() with base 10: 'create'

我不知道它从哪里来。

models.py

from django.db import models
from django.urls import reverse
# Create your models here.
class Post(models.Model):
    title = models.CharField(max_length= 120)
    content = models.TextField()
    updated = models.DateTimeField(auto_now=True, auto_now_add=False)
    timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)


    def __unicode__(self):
        return self.title 

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        return reverse("posts:detail", kwargs={"id": self.id})
        #return "/posts/%s/" %(self.id)

views.py

from django.shortcuts import render, get_object_or_404
from django.http import HttpResponse
from .models import Post
from .forms import PostForm

def posts_create(request):
    form = PostForm()
    context = {
        "form": form,
    }
    return render(request, "post_form.html", context)

forms.py

from django import forms

from .models import Post

class PostForm(forms.ModelForm):
    class Meta: 
        model = Post
        fields = [
            "title",
            "content"
        ]

posts/urls.py

from django.urls import path
from .views import (
    posts_create,
    posts_delete,
    posts_detail,
    posts_list,
    posts_update
    )

app_name = "posts"

urlpatterns = [
    path("", posts_list, name="list"),
    path("<id>/", posts_detail, name="detail"),
    path("create/", posts_create, name="create"),
    path("edit/", posts_update, name="update"),
    path("delete/", posts_delete, name="delete"),

]

urls.py

from django.contrib import admin
from django.urls import path
from django.conf.urls import include
urlpatterns = [
    path('admin/', admin.site.urls),
    path('posts/', include('posts.urls', namespace='posts')),
]

这是我添加的网址

Answer 1

问题是你的模式带有 <id> ，匹配任何内容，因此这也包括非-整数项，因此 create等都将在第二个path时得到解决。为了仅匹配整数，您可以添加 int: path converter [Django-doc]对于它，这会将模式限制为数字元素:

# posts/urls.py

# ...

urlpatterns = [
    path("", posts_list, name="list"),
    # added int:
    path("<<b>int:</b>id>/", posts_detail, name="detail"),
    path("create/", posts_create, name="create"),
    path("edit/", posts_update, name="update"),
    path("delete/", posts_delete, name="delete"),

]

所以现在只有带有整数的 URL 才会“触发”第二条路径。对于类似 create/ 的路径等等。Django 将在列表中进一步查找匹配项，从而触发 posts_create查看。