[Nitro] Where to define Og relations

[Robert Mela]

Some of the relation declarations are for the benefit of Og in schema 
generation.

Others are for the benefit of Forms in generating form elements to bind 
relations ( see the views in nitro/part/admin/og )

Arne Brasseur wrote:
> I just found out the hard way that defining a 'belongs_to' relation at 
> the beginning of the model class does not work. Once any managed 
> attributes are defined it does works.
>
> require "og"
>
> class Word
>   belongs_to WordList
>
>   attr_accessor :definitions, Array
> end
>
> gives:
> ./app/model/word.rb:3: undefined method `belongs_to' for Word:Class 
> (NoMethodError)
>
> This:
>
> class Word
>   attr_accessor :definitions, Array
>
>   belongs_to WordList
> end
>
> works fine.
>
> Alternatively:
>
> class Word
>   include Og::RelationDSL
>   belongs_to WordList
>
>   attr_accessor :definitions, Array
> end
>
> also works fine.
>
> It's not clear to me if this is intended or not, has_many seems to work 
> fine once "og" is required. I haven't checked the other types of relations.
>
> G, is this known/intended? If so it should be documented. Robert, you 
> could perhaps add this to your cheatsheets? Very nice work BTW! I'm 
> using them all the time now.
>
> http://robmela.com/cheatsheets
>
> (ab)
>
>   

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