[ckan-dev] Update Single Resource Field via API

Fri Feb 7 14:39:06 UTC 2014

Hello,

Interestingly, I faced the same issue few minutes ago.

The "update" in CKAN works as the HTTP verb PUT: what you provide will
completely erase all the fields. So in my case, I was changing this groups,
but I lost my resources because the resource structure was missing in my
package data dict.

It's a bit of trouble, bit if would make things easier if CKAN could have
an additional action to do the same as PATCH (
https://tools.ietf.org/html/rfc5789), which only updates the fields
provided.

In any case, if you do it via a script, it is not that difficult to do
(here is an example with ckanapi for a package where I "merge" the existing
dictionnary with the new value I have created:

        package_exists, current_package =
self.package_exist(package["name"])
        if package_exists:
            self.logger.info("Package exists - put it - %s" %
package["name"])

            #If a field is not provide in the new package, we keep the old
value
            current_package.update(new_package_entity)
            self.ckanapi.action.package_update(**current_package)
        else:
            self.logger.info("Package does not exist - post it - %s" %
package["name"])
            self.ckanapi.action.package_create(**new_package_entity)

On Fri, Feb 7, 2014 at 3:15 AM, Nigel Babu <nigel.babu at okfn.org> wrote:

> Hello Kristi,
>
> Can you try doing a resource_show, modifying the dict, and then pushing it
> back via resource_update?
>
> Nigel Babu
>
> Developer  |  @nigelbabu <https://twitter.com/nigelbabu>
>
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>
> On 7 February 2014 10:16, kristi powell <y2kristi at hotmail.com> wrote:
>
>> Hello...
>>
>> I am trying to update a single field at the resource level via the API.
>>  I'm using the update_resource method.  In the body I have a json object
>> for example: "{"key":"value"}" but it's returning an error "Conflict."
>>
>> How can I change the value of just the single field without rewriting the
>> entire resource?
>>
>> Thanks,
>>
>> Kristi
>>
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