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desc 'Create YAML test fixtures from data in an existing database.

Defaults to development database. Set RAILS_ENV to override.'

task :extract_fixtures => :environment do

  sql = "SELECT * FROM %s"

  skip_tables = ["schema_info"]

  ActiveRecord::Base.establish_connection

  (ActiveRecord::Base.connection.tables - skip_tables).each do |table_name|

    i = "000"

    File.open("#{RAILS_ROOT}/#{table_name}.yml", 'w' ) do |file|

      data = ActiveRecord::Base.connection.select_all(sql % table_name)

      file.write data.inject({}) { |hash, record|

        # cast extracted values

        ActiveRecord::Base.connection.columns(table_name).each { |col|

          record[col.name] = col.type_cast(record[col.name]) if record[col.name]

        }

        hash["#{table_name}_#{i.succ!}"] = record

        hash

      }.to_yaml

    end

  end

end