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a guest Aug 13th, 2019 63 Never
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  1. def get_context_data(self, **kwargs):
  2.     context = super(InvoiceDetail, self).dispatch(*args, **kwargs)
  3.     request = self.request
  4.  
  5.     if request.GET:
  6.         try:
  7.             invoice_selector = request.GET.get('invoice_selector', None)
  8.             invoice = Invoice.objects.get(id = int(invoice_selector) ) # either a string representing a number or 'add invoice'
  9.             context_object_model = invoice
  10.         except ValueError:
  11.             return HttpResponseRedirect(reverse('accounting:add_invoice'))
  12.  
  13.     return context
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