python之如何为 Django 的每个 HiddenInput 字段设置值

我写了代码，但我不知道如何用Django模板设置隐藏标签的'name'和'value'。我读了Django's Widgets Docs , 但我找不到路。

(Pdb) print(errors) 
<ul class="errorlist"><li>friend_id<ul class="errorlist"><li>This field is required.</li></ul></li><li>add_remove<ul class="errorlist"><li>This field is required.</li></ul></li></ul> 

首先，我试着写成这样

<input type="hidden" name="friend_id" value="{{ user_info.user_id }}"> 

和

friend_id = request.POST.friend_id 

但是如果没有 Django 的 Form，我不知道如何获取 POST 值。因此，我使用 Django 的表单和以下代码。

View .py

from myapp.forms import HiddenUserPage 
hiddenform = HiddenUserPage 
if request.method == 'POST': 
    hidden = hiddenform(request.POST) 
 
if hidden.is_valid(): 
    from myapp.models import Friends 
    try: 
        friend_id = hidden.cleaned_data['friend_id'] 
        add_remove = hidden.cleaned_data['add_remove'] 
        if add_remove == "add": 
            f = Friends(user_id=request.user.user_id, friend_id=friend_id) 
            f.save() 
        elif add_remove == "remove": 
            f = Friends.objects.filter(user_id=request.user.user_id).get(friend_id=friend_id) 
            f.delete() 
    except: 
        errors = "DB error" 
    else: 
        errors = hidden.errors 
else: 
    hidden = hiddenform() 
    errors = "" 
 
 
view = {  
    'errors': errors, 
    'hidden': hidden, 
} 
 
template = 'myapp/user/user_page.html' 
return render(request, template, view) 

表单.py

class HiddenUserPage(forms.Form): 
 
    friend_id = forms.CharField(widget=forms.HiddenInput()) 
    add_remove = forms.CharField(widget=forms.HiddenInput()) 

user_page.html

    <form method="POST" action="" class=""> 
        {% csrf_token %} 
        <p class="submit"> 
            <button class="confirmbutton" type="submit"> 
                {% if is_friend %} 
                    remove friend 
                <!-- # I'd like to write like # --> 
                <!-- <input type="hidden" name="friend_id" value="remove"> # --> 
                <!-- <input type="hidden" name="friend_id" value="{{ user_info.user_id }}"> # --> 
                    {{ hidden.add_remove }} 
                    {{ hidden.friend_id }} 
                {% else %} 
                    add friend 
                <!-- <input type="hidden" name="friend_id" value="add"> # --> 
                <!-- <input type="hidden" name="friend_id" value="{{ user_info.user_id }}"> # --> 
                    {{ hidden.add_remove }} 
                    {{ hidden.friend_id }} 
                {% endif %} 
            </button> 
        </p> 
    </form> 

抱歉，我的代码很脏。

请您参考如下方法:

看起来问题在于向表单提供初始数据，那么它通常在将 initial 传递给表单实例化的 View 中完成，例如:

# In your view.py 
def ...(...): 
    # Inside your view function  
    if request.method == 'GET': 
        # Provide initial data to the form here 
        # Get your 'user_info' from models or sessions, 
        # or wherever you keep it 
        hidden = hiddenform(initial={"friend_id":user_info.user_id}) 
    if reuest.method == 'POST': 
        hidden = hiddenform(request.POST) 
        # Process posted form data 
        ... 
    # More code general for both HTTP verbs 
    view = {'errors': errors, 'hidden': hidden} 
    template = 'myapp/user/user_page.html' 
    return render(request, template, view) 

您可能还想直接将表单绑定(bind)到模型数据，请参阅 the docs for more info .