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# File 'app/helpers/collection_to_csv_helper.rb', line 4
def collection_download(collection, options = {})
column_names = options[:columns].presence
associations = options[:associations].presence
link_text = options[:link_text].presence || "Download"
klass = collection.try(:first).class
raise("#{collection} is not a ActiveRecord collection") unless klass.ancestors.include?(ActiveRecord::Base)
collection_ids = collection.map(&:id)
link_to link_text,
collection2csv_path(ids: collection_ids, klass: klass, format: "csv",
column_names: column_names, associations: associations)
end
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