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Contents
# frozen_string_literal: true
module Spotlight
##
# Expose Solr index metadata about fields
class FieldMetadata
FACET_LIMIT = 20
attr_reader :exhibit, :repository, :blacklight_config
def initialize(exhibit, repository, blacklight_config)
@exhibit = exhibit
@repository = repository
@blacklight_config = blacklight_config
end
def field(key)
{
document_count: document_counts.fetch(field_name(key), 0),
value_count: terms.fetch(field_name(key), []).length,
terms: terms.fetch(field_name(key), [])
}
end
def search_params
search_builder.merge(rows: 0, 'facet.limit' => FACET_LIMIT + 1)
end
private
def field_name(key)
if blacklight_config.facet_fields[key]
blacklight_config.facet_fields[key].field
else
key
end
end
def search_builder_class
blacklight_config.search_builder_class
end
def search_builder
search_builder_class.new(self)
end
def solr_response
@solr_response ||= repository.search(search_params.merge('facet.query' => facet_fields.map { |_key, fields| "#{fields.field}:[* TO *]" },
'rows' => 0,
'facet' => true))
end
# This gets the number of *documents* with a field
def document_counts
@document_count ||= begin
solr_response.facet_queries.each_with_object({}) do |(k, v), h|
h[k.split(/:/).first] = v
end
end
end
def terms
@terms ||= begin
solr_response.aggregations.each_with_object({}) do |(facet_name, facet), h|
h[facet_name] = facet.items.map(&:label)
end
end
end
def facet_fields
blacklight_config.facet_fields.reject { |_k, v| v.pivot || v.query }
end
alias current_exhibit exhibit
end
end
Version data entries
16 entries across 16 versions & 1 rubygems