python - 在 django 社交媒体网络中创建一个赞按钮
问题描述
我是 django 的新手,我正在尝试为我的博客文章创建一个赞按钮。在我的 HomeFeed 应用中
但是,当我单击我创建的类似按钮时收到此错误:
以 10 为基数的 int() 的 ValueError 无效文字:'uien-jdhn-fds'
我得到一个指针,问题来自这个语句:
post = get_object_or_404(BlogPost, id=request.POST.get('blog_post_slug'))
是因为他们期望 url 中的所有整数但它正在获取字符值吗?我不确定如何更改它。
视图.py
def LikeView(request, slug):
context = {}
post = get_object_or_404(BlogPost, id=request.POST.get('blog_post_slug'))
if post.likes.filter(id=request.user.id).exists():
post.likes.remove(request.user)
else:
post.likes.add(request.user)
return HttpResponseRedirect(reverse('HomeFeed:detail',args=[str(BlogPost.slug)]))
def detail_blog_view(request, slug):
context = {}
#need to import a package get_object_or_404. return object or throw 404
blog_post = get_object_or_404(BlogPost, slug=slug)
total_likes = blog_post.total_likes()
context['blog_post'] = blog_post
context['total_likes'] = total_likes
return render(request, 'HomeFeed/detail_blog.html', context)
模型.py
class BlogPost(models.Model):
chief_title = models.CharField(max_length=50, null=False, blank=False)
body = models.TextField(max_length=5000, null=False, blank=False)
likes = models.ManyToManyField(settings.AUTH_USER_MODEL, related_name='blog_posts', blank=True)
slug = models.SlugField(blank=True, unique=True)
def __str__(self):
return self.chief_title
def total_likes(self):
return self.likes.count()
网址.py
from .views import(
detail_blog_view,
LikeView,
)
urlpatterns = [
path('<slug>/detail/', detail_blog_view, name= "detail"),
path('<slug>/edit/', edit_blog_view, name= "edit"),
path('<slug>/like/', LikeView, name='like_post'),
]
detail_blog.html
<form action="{% url 'HomeFeed:like_post' blog_post.slug %}" method="POST" >{% csrf_token %} <button type="submit" name="blog_post_slug" value="{{blog_post.slug}}" class='btn btn-primary btn-sm'>Like</button> {{ total_likes }} Likes</form>
以下是回溯:
Internal Server Error: /HomeFeed/uien-jdhn-fds/like/
Traceback (most recent call last):
File "lib/python3.8/site-packages/django/core/handlers/exception.py", line 34, in inner
response = get_response(request)
File "/lib/python3.8/site-packages/django/core/handlers/base.py", line 115, in _get_response
response = self.process_exception_by_middleware(e, request)
File "lib/python3.8/site-packages/django/core/handlers/base.py", line 113, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "views.py", line 195, in LikeView
post = get_object_or_404(BlogPost, id=request.POST.get('blog_post_slug'))
File "/lib/python3.8/site-packages/django/shortcuts.py", line 93, in get_object_or_404
return queryset.get(*args, **kwargs)
File "lib/python3.8/site-packages/django/db/models/query.py", line 399, in get
clone = self.filter(*args, **kwargs)
File "/lib/python3.8/site-packages/django/db/models/query.py", line 892, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "lib/python3.8/site-packages/django/db/models/query.py", line 910, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "/lib/python3.8/site-packages/django/db/models/sql/query.py", line 1290, in add_q
clause, _ = self._add_q(q_object, self.used_aliases)
File "/lib/python3.8/site-packages/django/db/models/sql/query.py", line 1315, in _add_q
child_clause, needed_inner = self.build_filter(
File "/lib/python3.8/site-packages/django/db/models/sql/query.py", line 1251, in build_filter
condition = self.build_lookup(lookups, col, value)
File "lib/python3.8/site-packages/django/db/models/sql/query.py", line 1116, in build_lookup
lookup = lookup_class(lhs, rhs)
File "lib/python3.8/site-packages/django/db/models/lookups.py", line 20, in __init__
self.rhs = self.get_prep_lookup()
File "/lib/python3.8/site-packages/django/db/models/lookups.py", line 70, in get_prep_lookup
return self.lhs.output_field.get_prep_value(self.rhs)
File "lib/python3.8/site-packages/django/db/models/fields/__init__.py", line 972, in get_prep_value
return int(value)
ValueError: invalid literal for int() with base 10: 'uien-jdhn-fds'
解决方案
您提交了slug,而不是主键,所以:
def LikeView(request, slug):
context = {}
post = get_object_or_404(BlogPost, slug=request.POST.get('blog_post_slug'))
# …
然而,没有必要通过按钮提交,您已经通过path完成了,因此您可以使用:
def LikeView(request, slug):
context = {}
post = get_object_or_404(BlogPost, slug=slug)
# …
此外,您还应该使用post.slug
, 或者只是slug
在您反转时使用,所以:
from django.shortcuts import redirect
def LikeView(request, slug):
# …
return redirect('HomeFeed:detail', slug=slug)
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