Ruby-on-rails – Reload column names in ActiveRecord model class


I have a script using ActiveRecord that creates column names dynamically based on values read from a CSV file, something like this:

FasterCSV.foreach('votes.csv', :headers => true) do |row|
  column_name = "roll_call_id_#{row['roll_call_id']}"

  if !
    connection_pool.connection.add_column('legislators', column_name, 'string')

The problem is that, after creating the new column, I can't do a legislator.update_attribute(column_name, value) because the class doesn't pick up the new column and complains it doesn't exist.

How can I make it query the table structure again?

Best Solution

Legislator.reset_column_information (API info)