Django get class from a string variable

Question

I have a variable initialised with class name. But, when I use this variable for accessing the class based view, it show the error 'str' object has no attribute 'as_view'. How to get the class from a string variable ..?

classname = "GetAjaxView"
return classname.as_view()(request)

user234461 · Accepted Answer · 2018-05-02 11:44:17Z

1

How about

eval(classname).as_view()(request)?

I'm assuming you don't know what class you want to use in advance, because otherwise you could write GetAjaxView.as_view()(request).

If you are generating the string from user input, do not use eval; instead, devise a solution that only responds to the input that you're expecting, perhaps something like:

if classname == "GetAjaxView":
  return GetAjaxView.as_view()(request)
elif classname in ["GetHectorView", "GetUlyssesView"]:
  return eval(classname).as_view()(request)
else:
  return defaults.server_error(request, template_name='500.html')

answered May 2, 2018 at 11:44

user234461

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4 Comments

Jinto Antony Over a year ago

Yes. That's right. The classname is dynamic. Yes, this works. All I needed was eval(). I think, using a dict is better from your suggestions.

user234461 Over a year ago

Yes, using a dict, like this: {'GetAjaxView' : GetAjaxView, 'GetHectorView': GetHectorView}[classname] seems like a safe and concise solution

Jinto Antony Over a year ago

I am changing all that now. Thanks.Can you upvote my question ? I am new to Django and I have so many doubts, therefore I put too many questions and now I can't ask questions anymore.

user234461 Over a year ago

@JintoAntony Sounds like you might wish to reconsider how you ask questions, unless you've just been unlucky with the downvote brigade. If you think my answer was useful, please upvote and/or accept it.

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