在django包含模板标签中处理请求 [英] Handling request in django inclusion template tag

问题描述

我是Django的新手，正在尝试将一个上传文件格式放入包含标签中。所以我可以在各种模板中使用它。

I am new to Django and am trying to put an upload file form into an inclusion tag. So I can use it in various templates.

我创建了以下包含标签：

I have created the following inclusion tag:

#upload_files.py

@register.inclusion_tag('upload_form.html')
def upload_handler(context):
    request = context['request']
    view_url = reverse('upload.views.upload_handler')
    if request.method == 'POST':
        form = UploadForm(request.POST, request.FILES)
        if form.is_valid():
            form.save()
        return HttpResponseRedirect(view_url)

    upload_url, upload_data = prepare_upload(request, view_url)
    form = UploadForm()

    upload_model_list = UploadModel.objects.all().order_by('-pub_date')

我现在希望将其包含在一个模板中，所以在我的页面上：

I wish to now include this in a template, so on the page I have:

#mypage.html
{% extends 'base.html' %}
{% load upload_files %}

{% upload_handler %}

I get the following error:

upload_handler takes 1 arguments

我应该从模板中传递什么参数？

What argument should I be passing from the template?

推荐答案

您需要在注册标签时添加 Taking_context = True ，以获取django将上下文对象传递给函数：

You need to add takes_context=True when registering the tag to get django pass the context object to the function:

@register.inclusion_tag('upload_form.html', takes_context=True)

每个默认值上下文将永远是第一个参数！

Per default context will always be the first argument then!

有关更多详细信息请参阅django关于包含标签的文档。

For further details see django's documentation on inclusion tags.

旁注：仔细决定您使用此模板标签的页面，因为视图可能会以某种方式呈现附加表单/处理帖子请求，可能会与你的标签提供的逻辑（例如如果页面可能由来自另一个表单的帖子请求调用，则表单验证将被触发）。你可以例如另外检查一下HTML元素的名称是否在 request.POST 中，如果您有一个页面上的多个表单！

A side note: Decide carefully on what pages you use this template tag on, because a view may render additional forms/handle post requests in a certain way that might collide with the logic your tag provides (eg. the form validation will be triggered if the page may be called by a post request coming from another form). You could eg. additionally check if some HTML element's name is in request.POST if you have multiple forms on a page!

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