old_contents: from . import models
  import django_tables2 as tables
  
  from core.utils import AbsoluteURLColumn, NaturalDatetimeColumn
  
  
  class ContractTable(tables.Table):
      link = AbsoluteURLColumn(accessor='__unicode__')
      publisher = AbsoluteURLColumn(accessor='publisher')
      created = NaturalDatetimeColumn()
      last_changed = NaturalDatetimeColumn()
  
      class Meta:
          model = models.Contract
          fields = ('link', 'publisher', 'state', 'valid_to',
                    'valid_from', 'open_source', 'in_communication', 'created',
                    'last_changed')
  
          attrs = {
              'class': 'table table-striped table-hover'
          }
  
new_contents: from . import models
  import django_tables2 as tables
  
  from core.utils import AbsoluteURLColumn, NaturalDatetimeColumn
  
  
  class ContractTable(tables.Table):
      link = AbsoluteURLColumn(accessor='__str__')
      publisher = AbsoluteURLColumn(accessor='publisher')
      created = NaturalDatetimeColumn()
      last_changed = NaturalDatetimeColumn()
  
      class Meta:
          model = models.Contract
          fields = ('link', 'publisher', 'state', 'valid_to',
                    'valid_from', 'open_source', 'in_communication', 'created',
                    'last_changed')
  
          attrs = {
              'class': 'table table-striped table-hover'
          }
  
subject: fix ContractTable link column