Class: Ruport::Data::Table::RosePivot

Inherits:
Pivot
  • Object
show all
Defined in:
lib/rose/ruport.rb

Overview

Enables using value blocks for the value column

Instance Method Summary collapse

Instance Method Details

#to_table ⇒ Object 



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# File 'lib/rose/ruport.rb', line 26

def to_table
  result = Ruport::Data::RoseTable.new()
  result.add_column(@group_column)
  pivoted_columns = columns_from_pivot
  pivoted_columns.each { |name| result.add_column(name) }
  outer_grouping = Grouping(@table, :by => @group_column)
  group_column_entries.each {|outer_group_name|
    outer_group = outer_grouping[outer_group_name]
    pivot_values = pivoted_columns.inject({}) do |hsh, pc|
      matching_rows = outer_group.rows_with(@pivot_column => pc)
      hsh[pc] = yield(matching_rows)
      hsh
    end
    result << [outer_group_name] + pivoted_columns.map {|pc|
      pivot_values[pc]
    }
  }
  result
end