[ckan-dev] ckan form - help

[Stéphane Guidoin]

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> 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
> To: 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>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
> To: 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
> To: 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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-- 
Stéphane Guidoin
Director, Transportation
Open North
514-862-0084
http://opennorth.ca
Twitter: @opennorth / @hoedic
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