Multiple RESTful Views

[PAW]

Hi there,

It appears that a REST view doesn't work quite like other views; each
method (GET/POST/PUT/DELETE) is a view itself.

This is a problem for me because i'd like to provide many different
RESTful interfaces for the same content type. Is this pattern
discouraged or is there a workaround that you guys know of?

I cannot seem to do this:

---------------------%<----------------------
class DefaultREST(grok.REST):
    grok.layer(IRestLayer)
    grok.name('default')
    grok.context(IFooContext)

    def GET(self):
        ....

class AlternateREST(grok.REST):
    grok.layer(IRestLayer)
    grok.name('alternate')
    grok.context(IFooContext)

    def GET(self):
       .....

ConfigurationConflictError: Conflicting configuration actions
---------------------%<----------------------

Any hints appreciated!

Regards,
Paul
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[Jan-Wijbrand Kolman-3]

Paul Wilson wrote:

> It appears that a REST view doesn't work quite like other views; each
> method (GET/POST/PUT/DELETE) is a view itself.
>
> This is a problem for me because i'd like to provide many different
> RESTful interfaces for the same content type. Is this pattern
> discouraged or is there a workaround that you guys know of?
>
> I cannot seem to do this:
>
> ---------------------%<----------------------
> class DefaultREST(grok.REST):
>     grok.layer(IRestLayer)
>     grok.name('default')
>     grok.context(IFooContext)
>
>     def GET(self):
>         ....
>
> class AlternateREST(grok.REST):
>     grok.layer(IRestLayer)
>     grok.name('alternate')
>     grok.context(IFooContext)
>
>     def GET(self):
>        .....
>
> ConfigurationConflictError: Conflicting configuration actions
> ---------------------%<----------------------
>
> Any hints appreciated!

The key is the grok.layer(IRestLayer). If you want to have two REST APIs
available for you objects, you should register each for a separate
layer, derived from the IRestLayer.

class IRestAPIOne(IRestLayer):
   grok.restskin('default')


class IRestAPITwo(IRestLayer):
     grok.restskin('alternate')


class DefaultREST(grok.REST):
     grok.layer(IRestAPIOne)
     grok.name('default')
     grok.context(IFooContext)

     def GET(self):
         ....

class AlternateREST(grok.REST):
     grok.layer(IRestAPITwo)
     grok.name('alternate')
     grok.context(IFooContext)

     def GET(self):
        .....

See also the ftests of Grok itself for more hints:

http://svn.zope.org/grok/trunk/src/grok/ftests/rest/rest.py?view=markup

HTH.
regards,
jw

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[PAW]

2009/9/24 Jan-Wijbrand Kolman <janwijbrand@...>:
> The key is the grok.layer(IRestLayer). If you want to have two REST APIs
> available for you objects, you should register each for a separate
> layer, derived from the IRestLayer.

Thanks!

I must have been tired last night because the REST tutorial clearly
covers this but I still managed to miss it!

Paul
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