python - Django modelformset_factory 什么都不保存

Question

为简单模型创建了一组表单。当我尝试更改表单中的模型对象数据并将这些更改保存在数据库中时，新数据不会因此保存，并且会重定向到具有相同数据的表单页面，尽管至少有关于应该输出操作的成功或失败。终端不返回任何错误，它被写入发送正确请求的日志中，测试服务器在正常模式下工作而不会掉线。有观点认为这是拒绝验证的原因，但究竟是什么原因造成的，具体错误隐藏在什么地方，目前还无法理解。

和

当我点击“保存”按钮时，在终端中看到这条消息(见下文):

[25/Aug/2017 18:03:06] "GET /categories/?csrfmiddlewaretoken=igSZl3z8pcF9qRGaMts9hG3T9dyaIpVvAxB672R34bmKvGYd6pymjmtwyEgDHGg2&form-TOTAL_FORMS=6&form-INITIAL_FORMS=5&form-MIN_NUM_FORMS=0&form-MAX_NUM_FORMS=1000&form-0-id=1&form-0-name=fhdrhddh&form-0-order=0&form-1-id=2&form-1-name=gdegasf&form-1-order=6&form-2-id=3&form-2-name=dfdgbsbgsdgs&form-2-order=2&form-3-id=4&form-3-name=dbgsgbasedgbaedvg&form-3-order=3&form-4-id=5&form-4-name=dgfsdg3waesdvz&form-4-order=4&form-5-id=&form-5-name=&form-5-order=0 HTTP/1.1" 200 7502

models.py(类别应用)

from django.db import models

# Create your models here.

class Category(models.Model):
    name = models.CharField(max_length = 30, db_index = True, unique = True, verbose_name = "Title")
    order = models.PositiveSmallIntegerField(default = 0, db_index = True, verbose_name = "Serial number")
    def __str__(self):
        return self.name
    class Meta:
        ordering = ["order", "name"]
        verbose_name = "category"
        verbose_name_plural = "categories"

views.py(类别应用)

from django.views.generic.base import TemplateView
from django.forms.models import modelformset_factory
from django.shortcuts import redirect
from django.contrib import messages
from categories.models import Category
from generic.mixins import CategoryListMixin

CategoriesFormset = modelformset_factory(Category, can_delete=True, fields = '__all__', extra=1, max_num=None)

class CategoriesEdit(TemplateView, CategoryListMixin):
    template_name = "categories_edit.html"
    formset = None
    def get(self, request, *args, **kwargs):
        self.formset = CategoriesFormset()
        return super(CategoriesEdit, self).get(request, *args, **kwargs)
    def get_context_data(self, **kwargs):
        context = super(CategoriesEdit, self).get_context_data(**kwargs)
        context["formset"] = self.formset
        return context
    def post(self, request, *args, **kwargs):
        self.formset = CategoriesFormset(request.POST)
        if self.formset.is_valid():
            self.formset.save()
            messages.api.add_message(request, messages.SUCCESS, "List of categories successfully changed")
            return redirect("categories_edit")
        else:
            messages.api.add_message(request, messages.SUCCESS, "Something is wrong!!!")
            return super(CategoriesEdit, self).get(request, *args, **kwargs)

混合类.py

from django.views.generic.base import ContextMixin

class CategoryListMixin(ContextMixin):
    def get_context_data(self, **kwargs):
        context = super(CategoryListMixin, self).get_context_data(**kwargs)
        context["current_url"] = self.request.path
        return context

categories_edit.html(类别应用)

{% extends "categories_base.html" %}
{% block title %} Categories {% endblock %}
{% block main %}
    {% include "generic/messages.html" %}
    {{ formset.errors }}
    <h2>Categories</h2>
    <form action="" method="post">
        {% include "generic/formset.html" %}
        <div class="submit-button"><input type="submit" value="Save"></div>
    </form>
{% endblock %}

formset.html(类别应用)

{% csrf_token %}
{{ formset.management_form }}
<table class="form">
    <tr>
        <th></th>
        {% with form=formset|first %}
            {% for field in form.visible_fields %}
                <th>
                    {{ field.label }}
                    {% if field.help_text %}
                        <br>{{ field.help_text }}
                    {% endif %}
                </th>
            {% endfor %}
        {% endwith %}
    </tr>
    {% for form in formset %}
        <tr>
            <td>
                {% for field in form.hidden_fields %}
                    {{ field }}
                {% endfor %}
            </td>
            {% for field in form.visible_fields %}
                <td>
                    {% if field.errors.count > 0 %}
                        <div class="error-list">
                            {{ field.errors }}
                        </div>
                    {% endif %}
                    <div class="control">{{ field }}</div>
                </td>
            {% endfor %}
        </tr>
    {% endfor %}
</table>

messages.html(类别应用)

{% if messages %}
    <div id="messages-list">
        {% for message in messages %}
            <p class="{{ message.tags }}">{{ message }}</p>
        {% endfor %}
    </div>
{% endif %}

urls.py(类别应用)

from django.conf.urls import url
from django.contrib.auth.decorators import login_required
from categories.views import CategoriesEdit

urlpatterns = [
    url(r'^$', login_required(CategoriesEdit.as_view()), name  = "categories_edit"),
]

settings.py(项目)

"""
Django settings for t****** project.

Generated by 'django-admin startproject' using Django 1.10.6.

For more information on this file, see
https://docs.djangoproject.com/en/1.10/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/1.10/ref/settings/
"""

import os

BASE_DIR = os.path.dirname(os.path.dirname(__file__))

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.10/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = '***************************************************'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'guestbook',
    'categories',
    'imagepool',
    'page',
    'main',
    'news',
    'shop',
    'django.contrib.sites',
    'django_comments',
    'easy_thumbnails',
    'taggit',
    'precise_bbcode',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 't******.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'tdkennel.wsgi.application'


# Database
# https://docs.djangoproject.com/en/1.10/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 't******l',
        'USER': 'p*******',
        'PASSWORD': '********',
        'HOST': '',
        'PORT': '5432',
    }
}

# Password validation
# https://docs.djangoproject.com/en/1.10/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/1.10/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.10/howto/static-files/

STATIC_URL = '/static/'
STATICFILES_DIRS = (os.path.join(BASE_DIR, 'static'),)

MEDIA_ROOT = os.path.join(BASE_DIR, 'upload')
MEDIA_URL = '/media/'

LOGIN_URL = "login"
LOGOUT_URL = "logout"

SITE_ID = 1

THUMBNAIL_BASEDIR = "thumbnails"
THUMBNAIL_BASEDIR = {"goods.Good.image": {"base": {"size": (200, 100)},},}

LOGIN_REDIRECT_URL = "main"

Answer 1

我记得我也发生过类似的事情。我最终使用 Form 创建了 Formset:

尝试:

from django.forms import ModelForm
from categories.models import Category
from django.forms.models import modelformset_factory

class CategoryForm(ModelForm):
    class Meta:
        model = Category
        fields = '__all__'

CategoryFormSet = modelformset_factory(Category, form=CategoryForm)

并在 CategoriesEdit 中使用 CategoryFormSet

这只是一种变通方法，但希望对您有所帮助!