Rails 4.2, MySQL: cannot use 't.references' in migration

[bulzak]

So I generated a Rails migration using the 'references' keyword to create the association between model First and Second. I called:

rails g model second name:string first:references

And I got this:

class CreateSeconds < ActiveRecord::Migration
  def change
    create_table :seconds do |t|
      t.string :name
      t.references :first, index: true

      t.timestamps null: false
    end
    add_foreign_key :seconds, :firsts
  end
end

It fails like so:

command: rake db:migrate
== 20150311070101 CreateSeconds: migrating ====================================
-- create_table(:seconds)
#<Class:0x3e73138a>: An error has occurred, all later migrations canceled:

Index name 'index_seconds_on_first_id' on table 'seconds' already exists

It fails before the add_foreign_key call, complaining that the Index name 'index_seconds_on_first_id' on table 'seconds' already exists. The current walkaround is to remove the t.references call and replace it by add_reference :seconds, :first, index: true outside of create_table. So what is going on, why is t.references creating the index twice?

Also, the add_foreign_key method doesn't do anything at the moment.

[kares]

should be fixed now on 1-3-stable with #631 in place ... feel free to re-open if not, thanks!