nil.to_sym when migrating?

rubyonrails-talk
1

For whatever reason I'm getting the following when attempting to run a migration:

--rename_column(:listings, :listed_by, :agent_id) rake aborted! You have a nil object when you didn't expect it! The error occured while evaluating nil.to_sym

The migration itself looks like this: class CorrectColumnType < ActiveRecord::Migration   def self.up     rename_column :listings, :listed_by, :agent_id   end

  def self.down     rename_column :listings, :agent_id, :listed_by   end end

The table 'listings' and column 'listed_by' do exist and the code makes use of it fine--I just want to rename that column and can't.

Any ideas why?

2

the agent_id ? rerun with --trace