Yep, cross-reference.
Both file needs to require the other to load :)
Category definition needs Post defined
Post definition needs Category defined
We simply can't load these files in this way.
On May 4, 2012, at 10:54 AM, Rodrigo Rosenfeld Rosas wrote:
> Em 04-05-2012 07:48, Jon Leighton escreveu:
>>
>> There has been discussion about putting a new syntax into Rails 4 that more
>> closely resembles scopes. Example:
>>
>> has_many :comments, -> { where(deleted: false).order(:created_at) }
>
> For this particular case, I don't understand. What would be the advantage of
> lazy evaluation?
>
> Take a look at how some examples are handled in Sequel with regards to
> associations:
>
> http://sequel.rubyforge.org/rdoc/files/doc/association_basics_rdoc.html
>
> See section Association Options
>
> So, for that particular case, a single block would be enough without the need
> for a proc. Here is an example using Sequel:
>
> many_to_one(:comments){|ds| ds.where(deleted: false).order(:created_at) }
>
> Procs would be useful for some cases where you depend on some dynamic data
> (taken from the Sequel documentation with a small typo fix):
>
> Artist.one_to_many :songs, dataset: -> {
> Song.select(:songs.*).join(Lyric, id: :lyric_id,
> id => [:composer_id, :arranger_id, :vocalist_id, :lyricist_id])
> }
> Artist.first.songs_dataset
> # SELECT songs.* FROM songs
> # INNER JOIN lyrics ON
> # lyrics.id = songs.lyric_id AND
> # 1 IN (composer_id, arranger_id, vocalist_id, lyricist_id)
>
> Also, I much prefer such approach as a generalized one than the AR
> 'finder_sql' option in a sense that it could be more easily cascaded with
> other conditions.
>
> Am I missing something?
>
> Cheers,
> Rodrigo.
>
>
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Cheers,
Gabriel Sobrinho
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