On Friday, September 6, 2013 7:04:13 AM UTC-7, Rob Miller wrote:
>
> I realised, in the time it took my post to appear, that this is absolutely
> possible to model in Sequel, and is in fact quite straightforward; you
> simply pass a block to the association:
>
> one_to_many :attachments, :key => :post_parent, :class => self do |ds|
> ds.where(:post_type => 'attachment')
> end
>
> Hope this is useful to someone else who's in the same position as me! (And
> please do let me know if it isn't the most efficient/best way to do things.)
>
While you can use a block, in this case it may be easier to use :conditions:
one_to_many :attachments, :key => :post_parent, :class => self,
:conditions=>{:post_type => 'attachment'}
Other than succinctness, the advantages are that eager loading via eager_graph
will automatically work correctly.
Thanks,
Jeremy
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