Question

我正在做一个项目，但没有Django表单在我的任何页面上呈现。我已将其与django girls代码进行了比较，因为这是我通常会参考的内容，但实际上与之相同。不只是此页面，我的其他页面在呈现表单时也存在问题。这是代码：

Views.py

from django.shortcuts import render
from .models import *
from .forms import *
from django.shortcuts import render, get_object_or_404
from django.shortcuts import redirect
from django.contrib.auth.decorators import login_required
from django.contrib.auth import login, authenticate
from django.contrib.auth.forms import UserCreationForm
from django.db.models import Sum
from django.utils import timezone
from django.views.decorators.http import require_POST
from .cart import Cart
from django.db import transaction
from django.contrib import messages


@login_required
def post_edit(request, pk):
    post = get_object_or_404(Post, pk=pk)
    if request.method == "POST":
        form = PostForm(request.POST, instance=post)
        if form.is_valid():
            post = form.save(commit=False)
            post.save()
            return redirect('post_detail', pk=post.pk)
    else:
        form = PostForm(instance=Post)
    return render(request, 'rentadevapp/post_edit.html', {'rentadevapp': post_edit}, {'form': form})

Forms.py

class PostForm(forms.ModelForm):

    class Meta:
        model = Post
        fields = ('title', 'text',)

post_edit.html

{% extends 'rentadevapp/base.html' %}
{% load staticfiles %}
{% load crispy_forms_tags %}
{% block content %}
<head>
    <link rel="stylesheet" href="{% static 'css/post_edit.css' %}">
</head>
<body>
    <div class="container"><br>
        <h2>New Post</h2><br>
        <form method="POST" class="post-form">{% csrf_token %}
            {{ form.as_p }}
            <button type="submit" class="save btn btn-default">Save</button>
        </form>
    </div>
</body>
{% endblock %}

Models.py

class Post(models.Model):
    author = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    title = models.CharField(max_length=200)
    text = models.TextField()
    created_date = models.DateTimeField(
        default=timezone.now)
    updated_date = models.DateTimeField(auto_now_add=True)
    price = models.DecimalField(max_digits=10, decimal_places=2, default='0')

    class Meta:
        ordering = ('title',)

    def created(self):
        self.created_date = timezone.now()
        self.save()

    def updated(self):
        self.updated_date = timezone.now()
        self.save()

    def publish(self):
        self.published_date = timezone.now()
        self.save()

    def __str__(self):
        return self.title

我非常困惑，花了几个小时试图解决这个问题。任何帮助都非常感谢。谢谢！

Answer 1

您的表单不会在上下文中返回到模板。

在Django 1.11或2.2中，视图中的render函数调用应返回上下文变量字典作为第三个参数，但是您有两个字典。包含表单的字典的第4个参数将作为content_type传递，然后在HttpResponse中使用，因此我很惊讶没有发生任何奇怪的事情或看到错误

所以你在做；

return render(request, 'rentadevapp/post_edit.html', {'rentadevapp': post_edit}, {'form': form})

您需要做的是

context = {'form': form, 'rentadevapp': post_edit}

return render(request, 'rentadevapp/post_edit.html', context)

1.10之前的render具有不同的签名，但是request, template_name, context的前三个参数自<1.8

无法获取要在Django中呈现的表单

1 个答案: