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Django-tables2 uses the name of the column to look up the value to be shown on the model. Does you model have a link
field? If not, this will be blank. Alternatively, you can supply a ‘default’ attribute on the column, i.e.
class ScanTable(tables.Table):
link = tables.LinkColumn('detail', args=[tables.A('pk')], default='Link')
class Meta:
model = Scan
attrs = {'class':'paleblue'}
Source:stackexchange.com