BootstrapError参数“ form”应该包含有效的Django表单 [英] BootstrapError Parameter "form" should contain a valid Django Form
问题描述
我有一个名为评论的应用
i have an app called reviews
reviews / forms.py
reviews/forms.py
from django.forms import ModelForm, Textarea
from reviews.models import Review
class ReviewForm(ModelForm):
class Meta:
model = Review
fields = ['rating', 'comment']
widgets = {
'comment': Textarea(attrs={'cols': 40, 'rows': 15}),
}
reviews / views.py
reviews/views.py
from django.shortcuts import get_object_or_404, render
from django.http import HttpResponseRedirect
from django.core.urlresolvers import reverse
from .models import Review, Wine
from .forms import ReviewForm
import datetime
from django.contrib.auth.decorators import login_required
@login_required
def add_review(request, wine_id):
wine = get_object_or_404(Wine, pk=wine_id)
form = ReviewForm(request.POST)
if form.is_valid():
rating = form.cleaned_data['rating']
comment = form.cleaned_data['comment']
user_name = form.cleaned_data['user_name']
user_name = request.user.username
review = Review()
review.wine = wine
review.user_name = user_name
review.rating = rating
review.comment = comment
review.pub_date = datetime.datetime.now()
review.save()
# Always return an HttpResponseRedirect after successfully dealing
# with POST data. This prevents data from being posted twice if a
# user hits the Back button.
return HttpResponseRedirect(reverse('reviews:wine_detail', args=(wine.id,)))
return render(request, 'reviews/wine_detail.html', {'wine': wine, 'form': form})
评论/模板/评论/wine_detail.html
reviews/templates/reviews/wine_detail.html
{% extends 'base.html' %}
{% load bootstrap3 %}
{% block title %}
<h2>{{ wine.name }}</h2>
<h5>{{ wine.review_set.count }} reviews ({{ wine.average_rating | floatformat }} average rating)</h5>
{% endblock %}
{% block content %}
<h3>Recent reviews</h3>
{% if wine.review_set.all %}
<div class="row">
{% for review in wine.review_set.all %}
<div class="col-xs-6 col-lg-4">
<em>{{ review.comment }}</em>
<h6>Rated {{ review.rating }} of 5 by {{ review.user_name }}</h6>
<h5><a href="{% url 'reviews:review_detail' review.id %}">
Read more
</a></h5>
</div>
{% endfor %}
</div>
{% else %}
<p>No reviews for this wine yet</p>
{% endif %}
<h3>Add your review</h3>
{% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}
<form action="{% url 'reviews:add_review' wine.id %}" method="post" class="form">
{% csrf_token %}
{% bootstrap_form form layout='inline' %}
{% buttons %}
<button type="submit" class="btn btn-primary">
{% bootstrap_icon "star" %} Add
</button>
{% endbuttons %}
</form>
{% endblock %}
base.html
base.html
{% load bootstrap3 %}
{% bootstrap_css %}
{% bootstrap_javascript %}
{% block bootstrap3_content %}
<div class="container">
<nav class="navbar navbar-default">
<div class="navbar-header">
<a class="navbar-brand" href="{% url 'reviews:review_list' %}">Winerama</a>
</div>
<div id="navbar" class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li><a href="{% url 'reviews:wine_list' %}">Wine list</a></li>
<li><a href="{% url 'reviews:review_list' %}">Home</a></li>
</ul>
<ul class="nav navbar-nav navbar-right">
{% if user.is_authenticated %}
<li><a href="{% url 'reviews:user_review_list' user.username %}">Hello {{ user.username }}</a></li>
<li><a href="{% url 'auth:logout' %}">Logout</a></li>
{% else %}
<li><a href="{% url 'auth:login' %}">Login</a></li>
<li><a href="/accounts/register">Register</a></li>
{% endif %}
</ul>
</div>
</nav>
<h1>{% block title %}(no title){% endblock %}</h1>
{% bootstrap_messages %}
{% block content %}(no content){% endblock %}
</div>
{% endblock %}
我在此得到错误html文件中的 {％bootstrap_form form layout ='inline'％}
I am getting the error at the line {% bootstrap_form form layout='inline' %} in the html file
有人知道如何解决此问题吗？
Any idea how to fix this?
推荐答案
您的代码本身存在一些问题，因此我将尝试在注释中进行一些清理
There's a few problems with your code as it stands, so I'll try to clean it up with some comments as I would write it to add a review to a wine.
@login_required
def add_review(request, wine_id):
wine = get_object_or_404(Wine, pk=wine_id)
if request.POST:
form = ReviewForm(request.POST)
else:
form = ReviewForm()
if form.is_valid():
### NO NEED FOR - already set as part of valid modelform ::: rating = form.cleaned_data['rating']
### AS WELL AS ::: comment = form.cleaned_data['comment']
### THIS IS NOT A FIELD IN YOUR FORM :::user_name = form.cleaned_data['user_name']
user_name = request.user.username
review = form.save(commit=False) # commit = False means that this instantiate but not save a Review model object
review.wine = wine
review.user_name = user_name # Why use this instead of a ForeignKey to user?
review.pub_date = datetime.datetime.now() # works as long as pub_date is a DateTimeField
review.save() # save to the DB now
# Always return an HttpResponseRedirect after successfully dealing
# with POST data. This prevents data from being posted twice if a
# user hits the Back button.
return HttpResponseRedirect(reverse('reviews:wine_detail', args=(wine.id,))) # THIS will redirect only upon form save
return render(request, 'reviews/wine_detail.html', {'wine': wine, 'form': form})
现在，您看到的错误是最有可能与您将 request.POST 传递给表单有关，即使request.POST为空；表单将尝试设置初始值，但带有一个querydict，该dictdict没有与表单实际相关的值。
Now, the error your seeing is most likely related to you passing request.POST to a form even if request.POST is blank; the form will attempt to set initial values but with a querydict that has no values that actually relates to the form.
编辑：针对您的评论，我的下一步是尝试分别渲染每个表单字段，看看是否可以触发失败。
EDIT: In response to your comments, my next step would be to try and render each form field individually and see if I can trigger a failure.
而不是 {％bootstrap_form form layout ='inline'％} ，请尝试-
{% for field in form %}
{% bootstrap_field field %}
{% endfor %}
如果这是django-bootstrap库的错误，尝试将textarea小部件和内联样式一起呈现（就像我将在这一点上怀疑），您也可以消除小部件参数，看看是否有解决方法。如果有的话，建议您覆盖模型窗体的 init 方法，以分配小部件，然后在 init 上进行超级调用。
If this is an error with the django-bootstrap library trying to render the textarea widget and the inline style together (as I would suspect at this point), you can also eliminate the widget parameter and see if there's a fix. If there is, I'd suggest overriding your modelform's init method for assign a widget post a call super on init.
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