Python 如何在django中正确保存多个文件？

我需要的形式，用户可以创建几个图像的文章。我将应用程序用于

图像

字段。我可以选择多个图像，但当我尝试提交表单时，在图像字段下有一条消息：

“字段为空，字段为必填项”

。我的错在哪里？为什么图像字段不为空时会有这样的消息

也可能有人可以建议好的例子或应用程序来保存几个图像。我将非常感谢任何帮助

型号。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/')

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

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)

{% 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>

forms.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/')

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

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)

{% 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>

视图。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/')

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

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)

{% 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>

文章\u add.html:

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/')

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

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)

{% 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>

{%load widget\u tweaks%}
{%csrf_令牌%}
{文章中字段的%u形式%}
{{field.label}
{%render_field class=“form control”%}
{%字段中有错误。错误%}
{{error}}
{%endfor%}
{%endfor%}
提交

尝试在图像字段中添加“最小值”约束

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

编辑

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)

这个问题可能是因为您试图在一个视图中呈现两个模板，而使用django template renderingrender时，它是一个快捷方式函数，而不是字符串转换和解析为json

另外，“ToeLeYLIST”必须是另一个视图，它显示了所有文章的列表，在添加了一个新文章之后，您应该考虑重定向到列表视图。在这里，您试图在一个视图中呈现多个模板。您可以在列表视图中创建类似的内容

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

---

虽然，这些是我个人对你刚才分享的代码的看法。尝试这种方法…

我有一个错误：

TypeError:\uuuuu init\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu。。。。您只上载图像，不是吗？或者可以使用MultiImageField（）。这限制了用户只上载图像，使用multifielfield可以上载任何文件类型…我尝试了
multifielfield
和
MultiImageField
。我认为表单中的
save
方法不起作用。我把
print（“True”）
放在save方法中只是为了测试。但PyCharm控制台中什么也没有。您认为我的保存方法正确吗？您的“需要图像”错误是否仍然存在？？