Class: Sunspot::InstantiatedFacet

Inherits:
Facet
  • Object
show all
Defined in:
lib/sunspot/instantiated_facet.rb

Overview

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.

Instatiated facets are possible for fields which are defined with a :references option.

The #rows method returns InstantiatedFacetRow objects.

Instance Method Summary collapse

Methods inherited from Facet

#initialize, #name

Constructor Details

This class inherits a constructor from Sunspot::Facet

Instance Method Details

#populate_instances! ⇒ Object

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.

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# File 'lib/sunspot/instantiated_facet.rb', line 19

def populate_instances! #:nodoc:
  ids = rows.map { |row| row.value }
  reference_class = Sunspot::Util.full_const_get(@facet_data.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

#rows ⇒ Object

A collection of InstantiatedFacetRow objects

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# File 'lib/sunspot/instantiated_facet.rb', line 35

def rows
  @facet_data.rows { |value, count| InstantiatedFacetRow.new(value, count, self) }
end