Install from an existing model / database

Question

I am wondering how to add an application to an existing database with another user. Here I already have a customer model, and I want to change it to allow her to work on it.

I created a new migration and inserted the code following

class AddDeviseToCustomer < ActiveRecord::Migration def change change_table :customers do |t| #t.database_authenticatable t.string :encrypted_password, :null => false, :default => '', :limit => 128 t.confirmable t.recoverable t.rememberable t.trackable t.token_authenticatable t.timestamps end end end 

Accordingly, it should work. https://github.com/plataformatec/devise/wiki/How-To:-change-an-already-existing-table-to-add-devise-required-columns . But when I run rake db: migrate, I get the following

 undefined method `confirmable' for #<ActiveRecord::ConnectionAdapters::Table:0x9286a28> 

I performed the following line

 rails g devise:install 

Any development reason will not recognize it, do I need to do something to say that the client is an application? thanks in advance

Answer 1

The documentation seems to be out of date.

Try using the development generator, it will create the same migration, with the correct parameters, this is normal if its existing model:

 rails g devise customer 

he must create AddDeviseToCustomers migration

with something similar to this:

 class AddDeviseToCustomers < ActiveRecord::Migration def self.up change_table(:customers) do |t| ## Database authenticatable t.string :email, :null => false, :default => "" t.string :encrypted_password, :null => false, :default => "" ## Recoverable t.string :reset_password_token t.datetime :reset_password_sent_at ## Rememberable t.datetime :remember_created_at ## Trackable t.integer :sign_in_count, :default => 0 t.datetime :current_sign_in_at t.datetime :last_sign_in_at t.string :current_sign_in_ip t.string :last_sign_in_ip ## Confirmable t.string :confirmation_token t.datetime :confirmed_at t.datetime :confirmation_sent_at t.string :unconfirmed_email # Only if using reconfirmable ## Lockable # t.integer :failed_attempts, :default => 0 # Only if lock strategy is :failed_attempts # t.string :unlock_token # Only if unlock strategy is :email or :both # t.datetime :locked_at ## Token authenticatable # t.string :authentication_token # Uncomment below if timestamps were not included in your original model. # t.timestamps end def self.down # By default, we don't want to make any assumption about how to roll back a migration when your # model already existed. Please edit below which fields you would like to remove in this migration. raise ActiveRecord::IrreversibleMigration end end 

note that there is no longer t.confirmable