text: from sqlalchemy.orm import joinedload
  from clld.web import datatables
  from clld.web.datatables.base import LinkCol, Col, LinkToMapCol
  {% if cookiecutter.cldf_module %}
  from clld_glottologfamily_plugin.models import Family
  from clld_glottologfamily_plugin.datatables import FamilyCol
  {% endif %}
  
  from {{cookiecutter.directory_name}} import models
  
  
  {% if cookiecutter.cldf_module %}
  
  class Languages(datatables.Languages):
      def base_query(self, query):
          return query.join(Family).options(joinedload(models.Variety.family)).distinct()
  
      def col_defs(self):
          return [
              LinkCol(self, 'name'),
              FamilyCol(self, 'Family', models.Variety),
              Col(self,
                  'latitude',
                  sDescription='<small>The geographic latitude</small>'),
              Col(self,
                  'longitude',
                  sDescription='<small>The geographic longitude</small>'),
              LinkToMapCol(self, 'm'),
          ]
  {% endif %}
  
  
  def includeme(config):
      """register custom datatables"""
  {% if cookiecutter.cldf_module %}
      config.register_datatable('languages', Languages)
  {% endif %}