Class: RelationalExporter::RecordWorker

Inherits:
Object
  • Object
show all
Includes:
Celluloid, Celluloid::Logger
Defined in:
lib/relational_exporter/record_worker.rb

Constant Summary collapse

@@MAX_ASSOCIATED = 
{}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.csv_header_prefix_for_key(klass, key, index = nil) ⇒ Object 



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# File 'lib/relational_exporter/record_worker.rb', line 97

def self.csv_header_prefix_for_key(klass, key, index=nil)
  if klass.respond_to?(:active_model_serializer) && !klass.active_model_serializer.nil? && klass.active_model_serializer.respond_to?(:csv_header_prefix_for_key)
    header_prefix = klass.active_model_serializer.csv_header_prefix_for_key key.to_sym
  else
    header_prefix = klass.to_s
  end

  header_prefix + index.to_s + key.to_s.classify
end

.get_maxed_row_arr(records, fields, max_count = 0, &block) ⇒ Object 



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# File 'lib/relational_exporter/record_worker.rb', line 86

def self.get_maxed_row_arr(records, fields, max_count=0, &block)
  return if max_count.nil?
  max_count.times do |i|
    record = records[i].nil? ? {} : RecordWorker.serialized_attributes_for_object_or_class(records[i])
    fields.each do |field|
      val = record[field]
      yield val
    end
  end
end

.serialized_attributes_for_object_or_class(object) ⇒ Object 



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# File 'lib/relational_exporter/record_worker.rb', line 107

def self.serialized_attributes_for_object_or_class(object)
  return {} if object.nil?

  klass, model = object.is_a?(Class) ? [object, object.first] : [object.class, object]

  return {} if model.nil?

  if model.respond_to?(:active_model_serializer) && !model.active_model_serializer.nil?
    serialized = model.active_model_serializer.new(model).as_json(root: false)
  end

  serialized = model.attributes if serialized.nil?
  serialized
end

.symbolize_options(options) ⇒ Object 



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# File 'lib/relational_exporter/record_worker.rb', line 122

def self.symbolize_options(options)
  options = options.as_json
  if options.is_a? Hash
    options.deep_symbolize_keys!
  elsif options.is_a? Array
    options.map { |val| RecordWorker.symbolize_options val }
  end
end

Instance Method Details

#actor_died(actor, reason) ⇒ Object 



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# File 'lib/relational_exporter/record_worker.rb', line 9

def actor_died(actor, reason)
  puts "Oh no! #{actor.inspect} has died because of a #{reason.class}" unless reason.nil?
end

#get_csv_row(record_sequence, record, associations, with_headers = false) ⇒ Object 



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# File 'lib/relational_exporter/record_worker.rb', line 15

def get_csv_row(record_sequence, record, associations, with_headers=false)
  @record = record
  @associations = associations

  get_rows with_headers

  info "Queueing record #{record_sequence} <#{Actor.current}>…"
  Celluloid::Actor[:csv_builder].queue[record_sequence] = [@header_row, @value_row]
end

#get_rows(get_headers = false) ⇒ Object 



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# File 'lib/relational_exporter/record_worker.rb', line 25

def get_rows(get_headers=false)
  @header_row = []
  @value_row = []
  main_klass = @record.class

  RecordWorker.serialized_attributes_for_object_or_class(@record).each do |field, value|
    @header_row << RecordWorker.csv_header_prefix_for_key(main_klass, field) if get_headers
    @value_row << value
  end

  @associations.each do |association_accessor, association_options|
    association_accessor = association_accessor.to_s.to_sym
    association_klass = association_accessor.to_s.classify.constantize
    scope = RecordWorker.symbolize_options association_options.scope

    associated = @record.send association_accessor
    # TODO - this might suck for single associations (has_one) because they don't return an ar::associations::collectionproxy
    associated = associated.find_all_by_scope(scope) unless scope.blank? || !associated.respond_to?(:find_all_by_scope)

    if associated.is_a? Hash
      associated = [ associated ]
    elsif associated.blank?
      associated = []
    end

    foreign_key = main_klass.reflections[association_accessor].foreign_key rescue nil

    fields = RecordWorker.serialized_attributes_for_object_or_class(association_klass).keys

    fields.reject! {|v| v == foreign_key } if foreign_key

    if get_headers
      @@MAX_ASSOCIATED[association_accessor] ||= begin
        case main_klass.reflections[association_accessor].macro
        when :has_many
          max_associated = association_klass.find_all_by_scope(scope)
                                            .joins(main_klass.table_name.to_sym)
                                            .order('count_all desc')
                                            .group(foreign_key)
                                            .limit(1).count.flatten[1]
        when :has_one
          max_associated = 1
        end

        max_associated = 0 if max_associated.nil?
        max_associated
      end

      @@MAX_ASSOCIATED[association_accessor].times do |i|
        fields.each do |field|
          @header_row << RecordWorker.csv_header_prefix_for_key(association_klass, field, i+1)
        end
      end
    end

    RecordWorker.get_maxed_row_arr(associated, fields, @@MAX_ASSOCIATED[association_accessor]) do |field|
      @value_row << field
    end
  end
end