Re: Thread-safeness of templates

  Are you sure your context is thread-safe, ie. it's rebuilt from scratch every time you render an email and not re-used, stored in a global variable, class variable, whatever? Your problem description very much sounds like someone is fiddling with the context while the template is rendering.

  A popular way to generate such a problem would be to use a literal dict as default parameter, something like:

    def my_render_email(recipient, context={}):

        context['email'] = recipient

        body = render_to_string('template.html', context) 

        ...

  That is absolutely positively guaranteed to blow up in your face when you least expect it.

        mjl

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