[ckan-dev] How to access an array in extra-fields ?

Thu Apr 28 14:41:33 UTC 2011

On 28 April 2011 15:55, Pascal Christoph <christoph at hbz-nrw.de> wrote:
> Hello *,
>
> we encountered a Problem concerning accessing Arrays/Lists.
>
> curl -XGET 'http://ckan.net/api/rest/package/hbz_unioncatalog'
>
> will get you amongst others:
>
>  "extras": {"publishingInstitution":
> "[u'http://lobid.org/organisation/DE-605',
> u'http://lobid.org/organisation/DE-290',
> u'http://lobid.org/organisation/DE-38M',
> u'http://lobid.org/organisation/DE-98',
> u'http://lobid.org/organisation/DE-38',
> u'http://lobid.org/organisation/DE-Kn41',
> u'http://lobid.org/organisation/DE-82',
> u'http://lobid.org/organisation/DE-107',
> u'http://lobid.org/organisation/DE-929',
> u'http://lobid.org/organisation/DE-Zw1',
> u'http://lobid.org/organisation/DE-832']"}
>
> but if I try to query this:
>
> wget
> 'http://ckan.net/api/search/package?q=lobid&publishingInstitution="http://lobid.org/organisation/DE-605"'
>
> I get only two packages, among the package "hbz_unioncatalog" is
> missing. (These two packages have only one value for
> "publishingInstitution").

It looks like a quoting problem in your command. This gives a result
of 15 packages including the hbz_unioncatalog:

wget http://ckan.net/api/search/package?q=lobid&publishingInstitution="http://lobid.org/organisation/DE-605"

> The "extra/publishingInstitution"-Array was uploaded through a "curl
> -XPUT ...
>  "extras": {
>    "publishingInstitution":[
>      "http://lobid.org/organisation/DE-605",
>      "http://lobid.org/organisation/DE-290",
>      "http://lobid.org/organisation/DE-38M",
>      "http://lobid.org/organisation/DE-98",
>      "http://lobid.org/organisation/DE-38",
>      "http://lobid.org/organisation/DE-Kn41",
>      "http://lobid.org/organisation/DE-82",
>      "http://lobid.org/organisation/DE-107",
>      "http://lobid.org/organisation/DE-929",
>      "http://lobid.org/organisation/DE-Zw1",
>      "http://lobid.org/organisation/DE-832"
>    ]
>    },
> ...
>
> is there somethin wrong with?
>
> Further, I discovered apparently a bug resp. an inconistency:
> when editing this "extra/publishingInstitution"-Field by hand through
> http://ckan.net/package/edit/hbz_unioncatalog
> the array/list will be broken when saved.
>
> Do you know what to I shall do?
>
> -o
>
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