Filtering elements from lists of dicts like 'cited-responsible-party'

[aianta]

Certain fields in pkg_dict contain lists of objects. One such example is cited-responsible-party.

u 'cited-responsible-party': [{
            u 'contact-info_email': u '',
            u 'contact-info_online-resource_application-profile': u '',
            u 'contact-info_online-resource_description': u '',
            u 'contact-info_online-resource_function': u '',
            u 'contact-info_online-resource_name': u '',
            u 'contact-info_online-resource_protocol': u '',
            u 'contact-info_online-resource_protocol-request': u '',
            u 'contact-info_online-resource_url': u 'https://www.mi.mun.ca/departments/centreforappliedoceantechnology/',
            u 'individual-name': u 'Marine Institute',
            u 'organisation-name': u '',
            u 'position-name': u '',
            u 'role': u 'author'
        }
    ]

For the time being the plugin doesn't support filtering on these fields as there is no straight forward way to generalize filtering logic. Objects within a list are not guaranteed to have the same fields meaning that filtering would always have to be decided on a per package basis.

Until such time that this functionality is requested by a stakeholder this issue can be placed on the back burner.

[greebie]

Agreed. I think a possible solution (if requested or partially requested) is to create model objects by inheriting dict into a class. https://stackoverflow.com/questions/61517/python-dictionary-from-an-objects-fields

If we want even more control, I think it's also possible to create immutable objects by extending Tuple or named tuple (using the associated library). https://stackoverflow.com/questions/51342228/python-equivalent-of-scala-case-class

Python 3.7 has the data class object, which is a nice feature to have down the road.

[greebie]

Based on discussion, we felt that our efforts could benefit from a data model that was implemented across the ckan extensions.