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I am trying to harvest several CKAN repositories for their metadata, using CKAN REST API.

I wanted to only update the changed datasets (metadata only) in my repository, but I do not see a way to specify that I only want changes since my last update, as recently_changed_packages_activity_list does not have a timestamp as input.

Is this to be done with the offset parameter, and therefore assume that the order of the changed datasets is constant and the list gets appended to?

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Do not use the REST API, it's old and deprecated. Use the Action API.

You can get the results you need using the package_search action, eg for datasets modified since 1st August 2026:

http://demo.ckan.org/api/action/package_search?fq=metadata_modified:[2016-08-01T00:00:00.000Z TO NOW]

For datasets created since then:

http://demo.ckan.org/api/action/package_search?fq=metadata_created:[2016-08-01T00:00:00.000Z TO NOW]

You can of course combine these with any other filters, pagination, sorting, etc. Check the docs to find more.

  • 1
    Thanks, I am using the Action API, but I had overlooked package_search functionality. – Stefano Bocconi Sep 19 '16 at 10:24

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