AFAIK, something like this should work:
def find_visibles
find_in_coverage | find_known_missing
end
On Fri, May 18, 2012 at 10:53 PM, Gustavo de Sá Carvalho Honorato <
gustavohonor...@gmail.com> wrote:
> Hi all!
>
> I've googled all over and I couldn't find anything about chaining scopes
> with OR instead of the default AND.
>
> I have an Asset model with the following scopes:
>
> class Asset < ActiveRecord::Base
>
> (...)
>
> scope :find_in_coverage, lambda { where('timestamp(assets.found_at) >=
> ?', Asset.found_at_limit) }
> scope :find_unknown_in_coverage, where('assets.asset_type_id IS
> NULL').find_in_coverage
> scope :find_known_missing, lambda { where('assets.found_at < ? AND
> assets.asset_type_id IS NOT NULL', Asset.found_at_limit) }
>
> end
>
> I would like to create another scope ("find_visibles") which is the OR of
> "find_in_coverage" and "find_known_missing" scopes, like that:
>
> scope :find_visibles, find_in_coverage.find_know_missing
>
> The problem is that this method chain uses AND to concatenate WHERE
> clauses. I need this clauses to be concatenated using OR instead.
>
> How can I do that?
>
> Thanks in advance,
> Gustavo Honorato
>
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