Cannot migrate database: NoMethodError: undefined method `new' for DeviseTokenAuth:Module

[haslinger]

I'm in the process of integrating devise_token_audh (0.1.36) with devise (3.5.2) and jsonapi-resources (0.6.0). Ruby is 2.1.5, Rails 4.2.4.

I'm adding the new columns using the following migration because I have already a User table (and the setup generator does not repect this):

class DeviseTokenAuthCreateUsers < ActiveRecord::Migration
  def change
    add_column :users, :provider, :string, :null => false, :default => "email"
    add_column :users, :uid, :string, :null => false, :default => ""

    add_column :users, :confirmation_token, :string
    add_column :users, :confirmed_at, :datetime
    add_column :users, :confirmation_sent_at, :datetime
    add_column :users, :unconfirmed_email, :string

    add_column :users, :name, :string
    add_column :users, :nickname, :string
    add_column :users, :image, :string

    add_column :users, :tokens, :text

    add_index :users, [:uid, :provider],     :unique => true
    add_index :users, :confirmation_token,   :unique => true
  end
end

My routes.rb contain:

Rails.application.routes.draw do
  devise_for :users

  namespace :api do
    namespace :v1 do
      mount_devise_token_auth_for 'User', at: 'auth'

      jsonapi_resources :needs
      jsonapi_resources :volunteerings
    end
  end
...

The User model is

class User < ActiveRecord::Base

  devise :database_authenticatable, :registerable,
          :recoverable, :rememberable, :trackable, :validatable
          :confirmable, :omniauthable

  include DeviseTokenAuth::Concerns::User
...

Migrating the database fails on me with

rake aborted!
NoMethodError: undefined method `new' for DeviseTokenAuth:Module
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:775:in `load_migration'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:770:in `migration'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:765:in `disable_ddl_transaction'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:1048:in `use_transaction?'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:958:in `rescue in block in migrate'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:955:in `block in migrate'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:952:in `each'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:952:in `migrate'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:820:in `up'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:798:in `migrate'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/tasks/database_tasks.rb:137:in `migrate'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/railties/databases.rake:44:in `block (2 levels) in <top (required)>'
/home/stefan/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `eval'
/home/stefan/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `<main>'
NoMethodError: undefined method `new' for DeviseTokenAuth:Module
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:775:in `load_migration'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:770:in `migration'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:765:in `disable_ddl_transaction'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:1048:in `use_transaction?'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:1040:in `ddl_transaction'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:994:in `execute_migration_in_transaction'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:956:in `block in migrate'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:952:in `each'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:952:in `migrate'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:820:in `up'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/migration.rb:798:in `migrate'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/tasks/database_tasks.rb:137:in `migrate'
/home/stefan/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.4/lib/active_record/railties/databases.rake:44:in `block (2 levels) in <top (required)>'
/home/stefan/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `eval'
/home/stefan/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `<main>'
Tasks: TOP => db:migrate

Any ideas what I might be doing wrong?

[haslinger]

Also empty migration fails, even when I remove concern from model and controller and route.

[haslinger]

I'm such an idiot. I changed the migration file name, but not the class name.