reflexive relation

[GN]

I want to know how to create a reflexive relation with members of the same class. 

class MetaType(Document):
collection_name = "MetaTypes"
 structure = {
    'description': basestring,              # Description (name)                        

                                                 
        'parent': [MetaType]                                                                                   
         }

This gives a validation error.  However, when I try to express relations to other classes this is not a problem. How do we take care of the problem?

thanks

--
GN

[Nicolas Clairon]

Hi,

The simplest solution is to set the 'parent' field as empty array. The only issue is that this part of this structure won't be validated.

class MetaType(Document):

   __database__ = 'test'

   __collection__ = 'meta_types'

   structure: {

      'description': basestring,

      'parent': []

   }

--
 
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[Nagarjuna G]

On Mon, 2013-11-18 at 14:09 +0100, Nicolas Clairon wrote:
> Hi,
>
>
> The simplest solution is to set the 'parent' field as empty array. The
> only issue is that this part of this structure won't be validated.
>
>
> class MetaType(Document):
> __database__ = 'test'
> __collection__ = 'meta_types'
> structure: {
> 'description': basestring,
> 'parent': []
> }
>

In this case, quite a lot of possible values could go. We thought of
the following:

structure = {
'description': basestring, # Description (name)

'parent': ObjectId #
}

Here at least only an existing document id could go. The plan is to
write a validator that will restrict the scope of ObjectIds to those
of the current class.

thanks
--
GN

[Nicolas Clairon]

It will do just fine :)

thanks
--
GN