Rake task to print a table for show.html.erb' in a Rails app.

show_erb_gen.rake

#encoding: utf-8

require 'rake'

task :show_table_gen, :arg1 do |t, arg|
  # TODO eval(arg[]) is NOT secure code.
  model_name = eval(arg['arg1']) # => NOT secure code...
  str = <<-EOS
    <table>
  EOS
  model_name.column_names.each do |column|
    str += <<-EOS
        <th>
          column
        </th>
    EOS
  end
  puts str
end

namespace :show_erb_gen do
  desc 'generate show page. usage: rake show_erb_gen:run MODEL=TblSystem'
  task :run => :environment do
    puts "Model is #{ENV['MODEL']}"
    Rake::Task[:show_table_gen].invoke(ENV['MODEL'])
  end
end