[ckan-dev] ckan form - help

Fawcett, David (MNIT) David.Fawcett at state.mn.us
Wed Feb 5 20:21:01 UTC 2014 

Yes, you can add 'extras' to resources:  http://stackoverflow.com/questions/15709586/attach-extras-to-ckan-resources

Note that the API syntax is different for resources than for packages/datasets.

David.

From: ckan-dev [mailto:ckan-dev-bounces at lists.okfn.org] On Behalf Of kristi powell
Sent: Wednesday, February 05, 2014 2:00 PM
To: CKAN Development Discussions
Subject: Re: [ckan-dev] ckan form - help

Ok, can you add a field to a resource?

________________________________
Date: Wed, 5 Feb 2014 14:03:29 -0500
From: stephane at opennorth.ca<mailto:stephane at opennorth.ca>
To: ckan-dev at lists.okfn.org<mailto:ckan-dev at lists.okfn.org>
Subject: Re: [ckan-dev] ckan form - help
Hi Kristi,

I am not sure of all the intrinsicalities of CKAN, but it does not change change de tables. If I remember well, there is a table of "extras" where CKAN stores the field name and values of the additional fields. A new field can also be defined as a tag (in which case it goes with a defined vocabulary, it's a bit more complex).

In the example, you see this happen here:


   def _modify_package_schema(self, schema):



        # Add our custom country_code metadata field to the schema.



        schema.update({

                'country_code': [tk.get_validator('ignore_missing'),



                    tk.get_converter('convert_to_tags')('country_codes')]



                })

        # Add our custom_test metadata field to the schema, this one will use



        # convert_to_extras instead of convert_to_tags.



        schema.update({

                'custom_text': [tk.get_validator('ignore_missing'),



                    tk.get_converter('convert_to_extras')]



                })

        return schema



Basically, it adds extras (or tags) from the DB to the data schema that is made available.

Steph


On Wed, Feb 5, 2014 at 1:34 PM, kristi powell <y2kristi at hotmail.com<mailto:y2kristi at hotmail.com>> wrote:
Thanks Steph.

Is there a new field added to one of the ckan database tables or is a new table created?

Kristi

________________________________
Date: Wed, 5 Feb 2014 12:30:02 -0500
From: stephane at opennorth.ca<mailto:stephane at opennorth.ca>
To: ckan-dev at lists.okfn.org<mailto:ckan-dev at lists.okfn.org>
Subject: Re: [ckan-dev] ckan form - help

Hi Kristi,

Did you had a look to the idatasetform example :  https://github.com/ckan/ckan/tree/master/ckanext/example_idatasetform

You have there a perfect example to add fields.

Steph

On Wed, Feb 5, 2014 at 11:31 AM, kristi powell <y2kristi at hotmail.com<mailto:y2kristi at hotmail.com>> wrote:
I've registered...

I'm new to using ckan.  The new dataset form is pretty comprehensive, but I need 3 additional fields to be added.  I have read that it is not recommended to change the schema of the db tables, so i'm trying to create an extension.

For the fields that I needed added I can't seem to change the html file.  Am I expected to override the function in my python script and construct an entire new html form?  If I create a new html form am I responsible for writing the code to update the original ckan schema or just the fields that i'm adding.



Subject: ckan form - help
From: ckan-dev-owner at lists.okfn.org<mailto:ckan-dev-owner at lists.okfn.org>
To: y2kristi at hotmail.com<mailto:y2kristi at hotmail.com>
Date: Wed, 5 Feb 2014 16:10:12 +0000

Only list members can post to the ckan-dev mailing list. Please join
the list to post.



--Forwarded Message Attachment--
From: y2kristi at hotmail.com<mailto:y2kristi at hotmail.com>
To: ckan-dev at lists.okfn.org<mailto:ckan-dev at lists.okfn.org>
Subject: ckan form - help
Date: Wed, 5 Feb 2014 11:10:09 -0500
Hello,

I'm new to using ckan.  The new dataset form is pretty comprehensive, but I need 3 additional fields to be added.  I have read that it is not recommended to change the schema of the db tables, so i'm trying to create an extension.

For the fields that I needed added I can't seem to change the html file.  Am I expected to override the function in my python script and construct an entire new html form?  If I create a new html form am I responsible for writing the code to update the original ckan schema or just the fields that i'm adding.

Any help would be greatly appreciated.

Thanks,

Kristi

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