Question

我需要用户可以创建包含多个图像的文章的表单。我对image字段使用django-multiupload app。我可以选择几张图片但是当我尝试提交表单时，我在图片字段下面有消息："Field is empty and field is required"。我的错误在哪里？当图像字段不为空时，为什么我会收到此消息？

也许有人可以建议好的示例或应用程序来保存多个图像。我会非常感谢任何帮助。

models.py：

class Article(models.Model):
    description = models.TextField(_('Description'))

class Image(models.Model):
    article= models.ForeignKey(Article, on_delete=models.CASCADE)
    image = models.FileField(_('Image'), upload_to='images/%Y/%m/%d/')

forms.py：

class ArticleForm(forms.ModelForm):
    class Meta:
        model = Article
        fields = ('description', )

    image = MultiFileField()

    def save(self, commit=True):
        instance = super(ArticleForm, self).save(commit)
        for each in self.cleaned_data['image']:
            Image.objects.create(image=each, article=instance)
        return instance

views.py：

def article_add(request):
    data = dict()
    if request.method == 'POST':
        article_form = ArticleForm(request.POST, request.FILES)
        if article_form.is_valid():
            article = article_form.save(commit=False)
            ******
            article.save()
            data['form_is_valid'] = True
            articles = Article.objects.all
            context = {'articles': articles}
            context.update(csrf(request))
            data['html_article'] = render_to_string('project/article_list.html', context)
        else:
            data['form_is_valid'] = False
    else:
        article_form = ArticleForm()
    context = {'article_form': article_form}
    data['html_article_form'] = render_to_string('project/article_add.html', context, request=request)
    return JsonResponse(data)

article_add.html：

{% load widget_tweaks %}

<form method="post" action="{% url 'article_add' %}" class="article-add-form">
    {% csrf_token %}

    {% for field in article_form %}
    <div class="form-group{% if field.errors %} has-danger{% endif %}">
       <label class="form-control-label" for="{{ field.id_for_label }}">{{ field.label }}</label>
       {% render_field field class="form-control" %}
       {% for error in field.errors %}
          <div class="form-control-feedback">{{ error }}</div>
       {% endfor %}
    </div>
    {% endfor %}

    <button type="submit">Submit</button>
</form>

Answer 1

尝试添加＆＃34; min_num＆＃34;对图像区域的约束，

image = MultiMediaField(min_num=1, media_type='image')

修改

def article_add(request): if request.method == 'POST': article_form = ArticleForm(request.POST, request.FILES) if article_form.is_valid(): article = article_form.save(commit=False) ****** article.save() #assume you have already a view in the name 'article_list'. return redirect('article_list') else: article_form = ArticleForm() context = dict(article_form=article_form) return render(request, 'project/article_add.html', context)

问题可能是因为你试图在一个视图中渲染两个模板，同样在使用django模板渲染渲染是一个快捷函数时，最常使用它，而不是字符串转换和解析成json。

另外，＆＃39; article_list＆＃39;必须是另一个视图，它显示所有文章的列表，在添加新文章后，您应该考虑重定向到列表视图。在这里，您尝试在单个视图中呈现多个模板。你可以在列表视图中做出类似的事情，

def article_list(request): articles = Article.objects.all() context = dict(articles=articles) return render(request, 'project/article_list.html', context)

虽然，这些是我个人对您刚刚分享的代码的看法。尝试这种方法......

如何在django中正确保存多个文件？

1 个答案: