[ckan-dev] validation library and deform.

Sun Apr 3 07:49:12 UTC 2011

Hi,

just to say: following the "CKAN will use colander" announcement,
WDMMG is now also using it to do forms. In the few things we've done
so far it has been an excellent experience, the documentation is a
great help and we're planning to switch internal validation (data
loading) to it as well. We also have some simple recipies for error
reporting and form-filling.

All of this, of course is not to say that we should not use David's
tool (I don't know the reasons for the switch), but just to mention
that colander has a nice learning curve.

- Friedrich

On Sat, Apr 2, 2011 at 6:53 PM, Seb Bacon <seb.bacon at gmail.com> wrote:
> I had a chat with David on the phone about this, which amounted to:
>
>  - I think his suggested code is good
>  - But: I think that the challenge of reusing things rather than
> writing your own is too often ignored by developers.  If we aspire to
> reuse and share and improve, I don't think we should roll our own so
> often.
>  - When I selected colander I thought it'd be me doing it, and that's
> what I would've used.    But most importantly, it's looking like it's
> David who'll be doing most of the work doing dictization and
> validation, so I think it's important he works with something he
> likes.  That's what counts the most.
>
> So, apart from some very minor discomfort around point (2), I don't
> feel strongly about it.  And ultimately the person doing the work
> should enjoy doing it, that's the most important thing of all :)  I
> would be interested to get feedback from Pyramids people who are using
> colander, though.
>
> Seb
>
> On 2 April 2011 15:23, james at 3aims.com <james at 3aims.com> wrote:
>> I strongly prefer your version so will have to take a look at how it might
>> work with Deform. From what I remember though, we agreed on hand generated
>> forms, so I'm not sure this will be an issue anyway.
>>
>> Cheers,
>>
>> James
>>
>> ----- Reply message -----
>> From: "David Raznick" <kindly at gmail.com>
>> Date: Fri, Apr 1, 2011 15:50
>> Subject: [ckan-dev] validation library and deform.
>> To: "CKAN Development Discussions" <ckan-dev at lists.okfn.org>
>>
>> Hello
>>
>> A while ago Colander was decided by Seb to use as a validation/conversion
>> library.
>>
>> I have been doing the dictization work and in doing so came up with my own
>> library to do this, called navl.  https://bitbucket.org/kindly/navl/src
>>
>> Obviously I prefer my own library, it is more flexible and easier to write
>> validators and schemas for it.
>>
>> HOWEVER, colander is probably workable with. I am not 100% sure it will do
>> *all* we will need and some workarounds may be needed.  I also know that I
>> will find it frustrating to use.
>>
>> The main advantage of colander is that it Deform (a form library) needs
>> Colander schemas for it to work.   Deform may save a lot of time in creating
>> forms.
>>
>> So the question is.
>>
>> Will will be using deform??
>>
>> Seb said this was a minor point when looking for a
>> validation/conversion library,  however it may be very useful for us to be
>> able to use it.
>>
>> I am really not sure about this one.
>>
>> David
>>
>>
>>
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>>
>
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