Django的嵌套render_to_response始终显示内容类型

Question

Currently I am trying to create multiple view for one request. For 1 view, I am doing this:

return render_to_response(
    "/index/index.html",
    {}
)

And now when I try to add a "left" column to index.html, I need to put it on different view (because I need to apply the same technique on other place as well), this is how I do it:

leftCol = direct_to_template(request,settings.viewPath + "/columns/left.html",{})
return render_to_response(
    "/index/index.html",
    {
    'leftColumn': leftCol,
    }

The code works well, but the output is not what I expected. The leftCol shows the response header at the beginning of it's output:

"Content-Type: text/html; charset=utf-8"

How do I remove this header? I've been trying to modify the content_type and mimetype in the parameter but it didn't work.

Answer 1

That's because direct_to_template() returns a HttpResponse , not a string. Have you considered using templating functionality, eg the {% include %} template tag, or writing a template tag of your own?

If you insist on pre-rendering templates in your view and then combining them in your template, render the template yourself, rather than using direct_to_template() . eg

from django.template.loader import get_template
from django.template import RequestContext

def someview(request):
    leftCol = get_template(settings.viewPath + "/columns/left.html").render(RequestContext(request)
    render_to_response("/index/index.html", {'leftColumn': leftCol})

Answer 2

Use render_to_string ( http://docs.djangoproject.com/en/dev/ref/templates/api/#the-render-to-string-shortcut ) to get a string back after rendering a template. Alternatively, you can use an {% include %} to include a template in the same context as the current template (but this is still manual). Even better would be to have a base template that you inherit using {% extends 'base.html' %} which will just include common template functionality that you can override at your will using {% block %} and enables you to leave out duplicated template content like a left column.

Answer 3

The 'render_to_response' function returns an HttpResponse object. Instead of returning the object itself, you can return its content attribute to access only the output you want to render.

ie

response = render_to_response(
    "/index/index.html",
    {
    'leftColumn': leftCol,
    }
return response.content