[ckan-dev] Package modification date

[David Read]

On 17 May 2011 11:08, David Raznick <kindly at gmail.com> wrote:
> 2011/5/17 Adrià Mercader <amercadero at gmail.com>
>>
>> Hi all,
>>
>> I'm working on the CKAN harvester, and I need to check when a package
>> was last modified. I'm using the json API to get the remote packages.
>> Two different questions here:
>>
>> * For an individual package, "metadata_modified" looks like the one to
>> look at:
>> http://it.ckan.net/api/2/rest/package/2eb938e1-0aa0-4a33-8e2b-d7d8f6b41101
>>
>> The thing is that it is not always present, like in this case:
>> http://hu.ckan.net/api/2/rest/package/5f343aba-bef5-4f3f-abfd-672f2de1dbe0
>
> This must be an old/buggy version.   It would be sorted if we upgraded it,
> as the data is still there.
>>
>> Should I fall back to the revision
>>
>> (http://hu.ckan.net/api/2/rest/revision/6fe1c323-2094-4955-887b-abee19ab4f28)
>> to look at the last modified date in that case?
>> For the packages that have "metadata_modified", is this equivalent to
>> the revision timestamp?
>>
>> * If I wanted to query only the packages modified from a certain date,
>> I guess I should use the revision search api:
>> http://it.ckan.net/api/search/revision?since_time=2011-04-17
>>
>> My question is, are the revisions returned only referring to changes
>> in packages, or there could be also changes in groups, users, etc on
>> this list?
>
>
> Changes in metadata_modified include changes to extras, resources and tags
> as well.
>
> The revision_id against the package (above) only shows changes to the
> package object itself *not* the extras, resources and tags.
>
> No method shows changes to users and groups.

(only because we've not seen a use case for it yet...)

> Sadly the easiest way is to get changes since a certain date from the atom
> feed.  However that needs to be parsed.  This feed gives changes to extras,
> resources and tags.

Actually the revision search does this very nicely. The Atom feed has
a similar functionality, but is formatted more for humans and
syndication software.

David

>
>>
>>
>> Thanks!
>>
>> Adrià
>>
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