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Filterable
# Call scopes directly from your URL params:
#
# @products = Product.filter(params.slice(:status, :location, :starts_with))
module Filterable
extend ActiveSupport::Concern
module ClassMethods
# Call the class methods with the same name as the keys in <tt>filtering_params</tt>
# with their associated values. Most useful for calling named scopes from
# URL params. Make sure you don't pass stuff directly from the web without
# whitelisting only the params you care about first!
def filter(filtering_params)
results = self.where(nil) # create an anonymous scope
filtering_params.each do |key, value|
results = results.public_send(key, value) if value.present?
end
results.distinct
end
end
end
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