impress/app/flex/flex_search_extender.rb

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# see the detailed Extenders documentation at https://github.com/ddnexus/flex/wiki/Extenders
module FlexSearchExtender
# set this method to restrict this extender to certain types of results
# see the other Flex extenders for reference (https://github.com/ddnexus/flex/tree/master/lib/flex/result)
def self.should_extend?(response)
true
end
def scoped_loaded_collection(options)
options[:scopes] ||= {}
@loaded_collection ||= begin
records = []
# returns a structure like {Comment=>[{"_id"=>"123", ...}, {...}], BlogPost=>[...]}
h = Flex::Utils.group_array_by(collection) do |d|
d.mapped_class(should_raise=true)
end
h.each do |klass, docs|
scope = options[:scopes][klass.name] || klass.scoped
records |= scope.find(docs.map(&:_id))
end
class_ids = collection.map { |d| [d.mapped_class.to_s, d._id] }
# Reorder records to preserve order from search results
records = class_ids.map do |class_str, id|
records.detect do |record|
record.class.to_s == class_str && record.id.to_s == id.to_s
end
end
records.extend Flex::Result::Collection
records.setup(self['hits']['total'], variables)
records
end
end
end