Module: Reportly::Engine

Defined in:
lib/reportly/engine.rb

Class Method Summary collapse

Class Method Details

.report(items, *fields) ⇒ Object

Original code gist.github.com/bgreenlee/72234



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# File 'lib/reportly/engine.rb', line 4

def self.report(items, *fields)
  # find max length for each field; start with the field names themselves
  fields = items.first.class.column_names unless fields.any?
  max_len = Hash[*fields.map {|f| [f, f.to_s.length]}.flatten]
  items.each do |item|
    fields.each do |field|
      len = item.read_attribute(field).to_s.length
      max_len[field] = len if len > max_len[field]
    end
  end

  report = []
  
  border = '+-' + fields.map {|f| '-' * max_len[f] }.join('-+-') + '-+'
  title_row = '| ' + fields.map {|f| sprintf("%-#{max_len[f]}s", f.to_s) }.join(' | ') + ' |'

  report << border
  report <<  title_row
  report << border

  items.each do |item|
    row = '| ' + fields.map {|f| sprintf("%-#{max_len[f]}s", item.read_attribute(f)) }.join(' | ') + ' |'
    report <<  row
  end

  report << border
  report <<  "#{items.length} rows in set"
  report
end