Answers

• allan Posts: 63,498Questions: 1Answers: 10,471 Site admin

  August 2016

  Thanks for your question - however, per the forum rules can you link to a test case showing the issue please. This will allow the issue to be debugged.

  Information on how to create a test page, if you can't provide a link to your own page can be found here.

  Thanks,
  Allan
• RobinLI Posts: 4Questions: 1Answers: 0

  August 2016 edited August 2016

  I put the code here. It's Python code with Django.

  urls.py:
  url(r'^test_datatable_Json$', views.test_datatable_Json.as_view(), name = 'test_datatable_Json'),
  
  views.py:
  class test_datatable_Json(LoginRequiredMixin, BaseDatatableView):
      columns = ['id', 'test1']
      order_columns = ['id']
      max_display_length = 500
      #columns = ['outputtree__product_id', 'device_id']
  
      def get_initial_queryset(self):
          """
          Filter records to show only entries from the currently logged-in user.
          """
          wset = testabc.objects.all()
          print('the queryset is: ', wset)
          return wset
  

  records in testabc:

  +----+-------+
  | id | test1 |
  +----+-------+
  |  1 | 1     |
  |  2 | 2     |
  |  3 | 3     |
  |  4 | 4     |
  |  5 | 5     |
  |  6 | 6     |
  |  7 | 7     |
  |  8 | 8     |
  |  9 | 9     |
  | 10 | 10    |
  | 11 | 11    |
  | 12 | 12    |
  +----+-------+
  

  when I type the jsonaddress in browser(http://localhost:8000/test_datatable_Json) and get the following result:

  {"recordsFiltered": 12, "recordsTotal": 12, "draw": 0, "result": "ok", "data": [[1, "1"], [2, "2"], [3, "3"], [4, "4"], [5, "5"], [6, "6"], [7, "7"], [8, "8"], [9, "9"], [10, "10"]]}
  

  it's show 12 records, but actually only return 10.
  I trace into the datatable view, the issue is the paging() function return 10.

  Edited by Allan - Syntax highlighting. Details on how to highlight code using markdown can be found in this guide.
• RobinLI Posts: 4Questions: 1Answers: 0

  August 2016

  Just found that when I put &length=-1 in the address, it will get all 12 results.
  (http://localhost:8000/measurement/test_datatable_Json?&length=-1)

  Is this a bug? or should put length=-1 there?
• allan Posts: 63,498Questions: 1Answers: 10,471 Site admin

  August 2016

  It sounds and looks like your Python script hasn't implemented server-side processing. Either you need to implement that, or not use server-side processing.

  Allan
• RobinLI Posts: 4Questions: 1Answers: 0

  August 2016

  Sure, it's server side process issue. At server side, installed Django-datatable-view 1.13.0. and my code is based on BaseDatatableView base clase. the issue is in the base class funcction paging().

          if self.pre_camel_case_notation:
              limit = min(int(self._querydict.get('iDisplayLength', 10)), self.max_display_length)
              start = int(self._querydict.get('iDisplayStart', 0))
          else:
              limit = min(int(self._querydict.get('length', 10)), self.max_display_length)
              start = int(self._querydict.get('start', 0))
  

  with my example, it goes to else and set limit to 10. So I put &length=-1 at request to set this limit to -1.
  I dont' know why my 'paging' = false doesn't take effect. for my understanding, it should not go to paging().
• allan Posts: 63,498Questions: 1Answers: 10,471 Site admin

  August 2016

  I'm afraid I'm not familiar with that Django library. You would need to contact the author of that library for assistance with it - I know next to nothing about Python!

  Allan