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Module 7 - Customizing the web service

This module will demonstrate one example of web service customization.

You’re going to customize the countries web service so it includes only countries of the Oceana continent in its GeoJSON responses.

Programming task

This is done by adding code to the index action (function) of the CountriesController. The code to be added involves creating a Comparison filter and combining it with the default MapFish filter:

from sqlalchemy.sql import and_

def index(self, format='json'):
    """GET /: return all features."""
    if format != 'json':
    filter = and_(create_default_filter(request, Country),
                  Country.continent == "Africa")
    return, filter=filter)

[Correction here (controller/]