title: schema.rb file is not updating
body: <p>In my app, I edited a migration file shown here:</p>
  
  <pre><code>class CreateUsers &lt; ActiveRecord::Migration
    def change
      create_table :users do |t|
        t.string :first_name
        t.string :last_name
        t.string :dj_alias
        t.boolean :site_admin
        t.integer :station_id
        t.string :byline
        t.string :bio
  
        t.timestamps null: false
      end
    end
  end
  </code></pre>
  
  <p>to have the bio and byline fields. However, when I run rake db:reset, there is no change in the schema.rb file. The only error I see in that there is this code block:</p>
  
  <pre><code>ActiveRecord::Base.connection.tables.each do |table|
    result = ActiveRecord::Base.connection.execute("SELECT id FROM #{table} ORDER BY id DESC LIMIT 1") rescue ( puts "Warning: not procesing table #{table}. Id is missing?" ; next )
    ai_val = result.any? ? result.first['id'].to_i + 1 : 1
    puts "Resetting auto increment ID for #{table} to #{ai_val}"
  
    ActiveRecord::Base.connection.execute("ALTER SEQUENCE #{table}_id_seq  RESTART WITH #{ai_val}")
  end
  </code></pre>
  
  <p>at the bottom of the seeds.rb file, which is meant to handle indexing of the seeds file. when I run rake db:reset, the rescue statement in the first line displays: Warning: not procesing table schema_migrations. Id is missing?</p>
  
  <p>I guess I am confused why this statement is rescuing this? Although it seems like it might be the cause, but doesn't the schema.rb reset happen before the seeds.rb file is accessed?</p>
  
  <p>Here  is the output of rake db:migrate:status</p>
  
  <pre><code> Status   Migration ID    Migration Name
  --------------------------------------------------
  up     20150225041954  Create songs
  up     20150225042739  Create albums
  up     20150225043102  Create artists
  up     20150225043854  Create playlists
  up     20150225044118  Create users
  up     20150225044314  Create stations
  up     20150225061259  Create featured artists
  up     20150225153938  Add devise to users
  up     20150225200646  Create reviews
  up     20150321171830  Stations users
  up     20150323200255  Add last fm to album
  up     20150323200432  Add last fm to artist
  up     20150323200513  Add last fm to song
  up     20150325052314  Albums stations
  up     20150325061241  Playlist songs
  up     20150327172516  Add image url to albums
  up     20150327172532  Add image url to artists
  </code></pre>