Class: DbSpiderRootMerger

Inherits:
Object
  • Object
show all
Defined in:
lib/db_facet/db_spider_root_merger.rb

Instance Method Summary collapse

Constructor Details

#initialize(root_node) ⇒ DbSpiderRootMerger

Returns a new instance of DbSpiderRootMerger.



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# File 'lib/db_facet/db_spider_root_merger.rb', line 4

def initialize root_node
  @root_node = root_node
end

Instance Method Details

#merge!(data) ⇒ Object 



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# File 'lib/db_facet/db_spider_root_merger.rb', line 8

def merge! data
  root_model = @root_node[:class_name].constantize
  root_model.reflections.each do |ref_name, reflection|
    next unless data[ref_name]

    case data[ref_name]
      when Hash, Array, ActiveRecord::Base
        [data[ref_name]].flatten.each do |ref_data|
          rec = if ref_data.is_a? ActiveRecord::Base
            ref_data
          else
            reflection.klass.new ref_data
          end
          @root_node[:reflections][ref_name] ||= []
          @root_node[:reflections][ref_name] << DbSpiderReaderNode.new(rec).data_tree
        end

      when Proc
        @root_node[:reflections][ref_name].each do |ref_node|
          data[ref_name].call ref_node[:data]
        end

      else
        raise "Invalid value. data[ref_name] must be a Hash, Array of Hash`es or Lambda. Found #{data[ref_name].class} for ref_name #{ref_name}."
    end

    data.delete ref_name
  end

  @root_node[:data].merge! data.stringify_keys
end