我应该在哪里放置我的上下文以使 forms_as.p 正常工作

Question

基本上，我正在尝试通过 form.as_p 列出值，但它不起作用。它并不是真的不起作用，但它只有在我按下提交后才起作用（它只出现在我的模板中）。我相信我将上下文放置在错误的位置或错误的缩进中，但我不确定我应该将context['form'] = form 转移到哪里。我试图改变它，但它说在赋值之前引用了 lcoal 变量。有人可以建议吗？

之所以把它放在else下面是因为如果有错误我想显示错误

def create_blog_view(request):
    context = {}
    user = request.user
    if request.method == 'POST':
        form = CreateBlogPostForm(request.POST or None, request.FILES or None)
        if form.is_valid():
            obj= form.save(commit = False)
            author = Account.objects.filter(email=user.email).first()
            obj.author = author
            obj.save()
            return redirect('HomeFeed:main')
        else:
            context['form'] = form
    return render(request, "HomeFeed/create_blog.html", context)

def create_blog_view(request):
    context = {}
    user = request.user
    form = CreateBlogPostForm()
    if request.method == 'POST':
        form = CreateBlogPostForm(request.POST or None, request.FILES or None)
        if form.is_valid():
            obj= form.save(commit = False)
            author = Account.objects.filter(email=user.email).first()
            obj.author = author
            obj.save()
            return redirect('HomeFeed:main')
        else:
            context['form'] = form
    context['form'] = form

    return render(request, "HomeFeed/create_blog.html", context)

Answer 1

在你的 if 语句之前，你需要添加：

form = CreateBlogPostForm()
context['form'] = form

这将初始化一个空白表单并将其添加到您的上下文中。

目前，如果表单已提交（/ POST 请求已发送到视图）并且表单存在验证错误，您只会将“表单”添加到上下文中。

为了避免重复代码，最好是这样的：

def create_blog_view(request):
    user = request.user
    form = CreateBlogPostForm()
    if request.method == 'POST':
        form = CreateBlogPostForm(request.POST, request.FILES)
        if form.is_valid():
            obj= form.save(commit = False)
            author = Account.objects.filter(email=user.email).first()
            obj.author = author
            obj.save()
            return redirect('HomeFeed:main')
    context['form'] = form
    return render(request, "HomeFeed/create_blog.html", context)