Module: Ripple::Indexes

Extended by:
ActiveSupport::Concern
Defined in:
lib/ripple/indexes.rb

Overview

Adds secondary-indexes to Document properties.

Defined Under Namespace

Modules: ClassMethods, DocumentMethods

Instance Method Summary collapse

Instance Method Details

#indexes_for_persistence(prefix = '') ⇒ Hash

Returns indexes in a form suitable for persisting to Riak.

Returns:

  • (Hash) —

    indexes for this document



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# File 'lib/ripple/indexes.rb', line 43

def indexes_for_persistence(prefix = '')
  Hash.new {|h,k| h[k] = Set.new }.tap do |indexes|
    # Add embedded associations' indexes
    self.class.embedded_associations.each do |association|
      documents = instance_variable_get(association.ivar)
      unless documents.nil?
        Array(documents).each do |doc|
          embedded_indexes = doc.indexes_for_persistence("#{prefix}#{association.name}_")
          indexes.merge!(embedded_indexes) do |_,original,new|
            original.merge new
          end
        end
      end
    end

    # Add this document's indexes
    self.class.indexes.each do |key, index|
      if index.block
        index_value = index.to_index_value instance_exec(&index.block)
      else
        index_value = index.to_index_value send(key)
      end
      index_value = Set[index_value] unless index_value.is_a?(Enumerable) && !index_value.is_a?(String)
      indexes[prefix + index.index_key].merge index_value
    end
  end
end