Remove duplication in python django_tables2

Question

I'm using django_tables2, and have ended up with the following two tables which are almost identical:

class UserMapsetTable(Table):

    edit = ButtonColumn('Edit', 'mapsets_users_edit')
    mappings = ButtonColumn('Mappings', 'mapsets_users_mappings')

    class Meta:
        model = UserMappingRuleSet
        fields = (
            'name', 
            'notes'
        )
        attrs = responsive_table_attrs()


class ReadingMapsetTable(Table):

    edit = ButtonColumn('Edit', 'mapsets_readings_edit')
    mappings = ButtonColumn('Mappings', 'mapsets_readings_mappings')

    class Meta:
        model = ReadingMappingRuleSet
        fields = (
            'name', 
            'notes'
        )
        attrs = responsive_table_attrs()

How do I remove/reduce the duplication?

Answer 1

If they really are this similar, you could write a factory to dynamically create the Table classes for you:

def table_factory(Model, name):
    class Table(tables.Table)

        edit = ButtonColumn('Edit', 'mapsets_' + name + '_edit')
        mappings = ButtonColumn('Mappings', 'mapsets_' + name + '_mappings')

        class Meta:
            model = Model
            fields = (
                'name', 
                'notes'
            )
            attrs = responsive_table_attrs()
    return Table

UserMapsetTable = table_factory(UserMappingRuleSet, 'users')
ReadingMapsetTable = table_factory(ReadingMapRuleSet, 'readings')

In this example, I would not advise doing this. You probably need changing one of the two tables later which will be a PITA.

Another way would be to have some method on the model's returning the right value for mapset_{}_edit. Then you could just change the implementation of your ButtonColumn to ask the model for the correct value.