views.py 文件源码

def render_to_response(self, context, **kwargs):
        context['pdf'] = True
        pdf_response = HttpResponse(content_type='application/pdf')
        response = super().render_to_response(context, **kwargs)
        response.render()
        try:
            html = HTML(string=response.content)
            fileobj = io.BytesIO()
            html.write_pdf(fileobj)
            merger = PdfFileMerger()
            merger.append(fileobj)
            if self.object.science_case_file:
                merger.append(self.object.science_case_file.file)
            if self.object.experimental_design_file:
                merger.append(self.object.experimental_design_file.file)
            merger.write(pdf_response)
        except Exception as exc:
            error = 'There was an error generating your pdf. {}'
            messages.error(self.request, error.format(str(exc)))
            return HttpResponseRedirect(reverse('sciapplications:index'))
        return pdf_response