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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