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[qiaomin032 <chen.qiaomin@xxxxxxxxxxx>]

Public bug reported:

Cant delete subnet on network topology

Steps to Reproduce:
================
1. Open Project/Network/network topology panel;
2. Click the network icon, and there will display a new modal of the net info
3. Click the 'Delete Subnet' on the new modal.


Actual results:
===========
Subnet does not delete, and there will cast error in the console:
 File "/root/code_review/horizon/horizon/decorators.py", line 84, in dec
    return view_func(request, *args, **kwargs)
  File "/root/code_review/horizon/.venv/lib/python2.7/site-packages/django/views/generic/base.py", line 65, in view
    self = cls(**initkwargs)
  File "/root/code_review/horizon/horizon/tabs/views.py", line 87, in __init__
    super(TabbedTableView, self).__init__(*args, **kwargs)
  File "/root/code_review/horizon/horizon/tables/views.py", line 34, in __init__
    self.get_data_methods(self.table_classes, self._data_methods)
  File "/root/code_review/horizon/horizon/tables/views.py", line 61, in get_data_methods
    name)
  File "/root/code_review/horizon/horizon/tables/views.py", line 78, in check_method_exist
    "in %s." % (func_name, cls_name))
NotImplementedError: You must define a get_subnets_data method in NetworkDetailView.

Expected results:
==============
Subnet should delete

** Affects: horizon
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1643414

Title:
  Error on 'delete subnet' in network topology panel

Status in OpenStack Dashboard (Horizon):
  New

Bug description:
  Cant delete subnet on network topology

  Steps to Reproduce:
  ================
  1. Open Project/Network/network topology panel;
  2. Click the network icon, and there will display a new modal of the net info
  3. Click the 'Delete Subnet' on the new modal.

  
  Actual results:
  ===========
  Subnet does not delete, and there will cast error in the console:
   File "/root/code_review/horizon/horizon/decorators.py", line 84, in dec
      return view_func(request, *args, **kwargs)
    File "/root/code_review/horizon/.venv/lib/python2.7/site-packages/django/views/generic/base.py", line 65, in view
      self = cls(**initkwargs)
    File "/root/code_review/horizon/horizon/tabs/views.py", line 87, in __init__
      super(TabbedTableView, self).__init__(*args, **kwargs)
    File "/root/code_review/horizon/horizon/tables/views.py", line 34, in __init__
      self.get_data_methods(self.table_classes, self._data_methods)
    File "/root/code_review/horizon/horizon/tables/views.py", line 61, in get_data_methods
      name)
    File "/root/code_review/horizon/horizon/tables/views.py", line 78, in check_method_exist
      "in %s." % (func_name, cls_name))
  NotImplementedError: You must define a get_subnets_data method in NetworkDetailView.

  Expected results:
  ==============
  Subnet should delete

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