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Contents
module Sunspot
#
# InstantiatedFacet instances allow access to a model instance based on a
# primary key stored in facet rows' values. The rows are hydrated lazily, but
# all rows are hydrated the first time #instance is called on any of the rows.
#
# The #rows method returns InstantiatedFacetRow objects.
#
class InstantiatedFacet < Facet
#
# Hydrate all rows for the facet. For data accessors that can efficiently
# batch load, this is more efficient than individually lazy-loading
# instances for each row, but allows us to still stay lazy and not do work
# in the persistent store if the instances are not needed.
#
def populate_instances! #:nodoc:
ids = rows.map { |row| row.value }
reference_class = Sunspot::Util.full_const_get(@field.reference.to_s)
accessor = Adapters::DataAccessor.create(reference_class)
instance_map = accessor.load_all(ids).inject({}) do |map, instance|
map[Adapters::InstanceAdapter.adapt(instance).id] = instance
map
end
for row in rows
row.instance = instance_map[row.value]
end
end
private
#
# Override the Facet#new_row method to return an InstantiateFacetRow
#
def new_row(pair)
InstantiatedFacetRow.new(pair, self)
end
end
end
Version data entries
11 entries across 11 versions & 4 rubygems