I am currently switching between runing migrations locally on an sqlite3 database and postgres for production on Heroku.

When switching back to a local sqlite3 I got this error when running the migration.

$ rake db:migrate

(in /Users/path/to/top/level)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:migrate
rake aborted!
undefined method `info' for nil:NilClass

The error I found through Stackoverflow was that I had not defined a logger.

My rakefile.rb for sinatra applications to run activerecord migrations.

require 'rubygems'
require 'rake'
require 'active_record'

namespace :db do
  desc "Migrate the database through scripts in db/migrate. Target specific version with VERSION=x"
  task :migrate => :environment do
    ActiveRecord::Migrator.migrate('db/migrate', ENV["VERSION"] ? ENV["VERSION"].to_i : nil )

task :environment do
    :adapter => 'sqlite3',
    :database => 'db/local.db'
  ActiveRecord::Base.logger = Logger.new(File.open('database.log', 'a'))

 # ActiveRecord::Base.establish_connection(
 #     :adapter  => 'postgresql',
 #     :host     => 'host',
 #     :username => 'user',
 #     :password => 'pass',
 #     :database => 'db'
 # )