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We already created a user model in the beggining of the project, but now (several migrations later) we would like to use the devise gem. Is it possible to add devise if the user model and table already exist? That is, is it possible to alter what is already done, or do we have to start all over again?
594
Add Devise for existing model First, add a column called "email" if you don't already have one. Second, make sure that every existing row has a unique value for email. Finally, go into the migration file called "add_devise_to_users" and comment out the line that adds an email column. and restart your server.
current_user is a Devise helper that accesses the details of the user who is currently signed in to the application. For instance, if you sign in with [email protected] , the current_user helper would return the user model for [email protected] . So, when using current_user.
When you create a User model with Devise using the command rails generate devise User . Devise will create default columns in the database for your User model. To add your own columns for your users you can create a new Rails migration and add any columns you want for your users.
Cavert Coder, but:
(Note, this doesn't migrate ":lockable" because I didn't care about it when I wrote it This now includes :lockable because MattSlay cared more than I did :). Also, you'll need to migrate your users passwords into the encrypted passwords field. Finally, it might not work for you. Sorry.)
class AddDevise < ActiveRecord::Migration
def self.up
null = false
default = ""
add_column :users, :encrypted_password, :string, :null => null, :default => default, :limit => 128
add_column :users, :password_salt, :string
add_column :users, :authentication_token, :string
add_column :users, :confirmation_token, :string
add_column :users, :confirmed_at, :datetime
add_column :users, :confirmation_sent_at, :datetime
add_column :users, :reset_password_token, :string
add_column :users, :remember_token, :string
add_column :users, :remember_created_at, :datetime
add_column :users, :sign_in_count, :integer, :default => 0
add_column :users, :current_sign_in_at, :datetime
add_column :users, :last_sign_in_at, :datetime
add_column :users, :current_sign_in_ip, :string
add_column :users, :last_sign_in_ip, :string
#:lockable fields contributed by MattSlay
add_column :users, :failed_attempts, :integer, :default => 0
add_column :users, :unlock_token, :string
add_column :users, :locked_at, :datetime
end
def self.down
remove_column :users, :encrypted_password
remove_column :users, :password_salt
remove_column :users, :authentication_token
remove_column :users, :confirmation_token
remove_column :users, :confirmed_at
remove_column :users, :confirmation_sent_at
remove_column :users, :reset_password_token
remove_column :users, :remember_token
remove_column :users, :remember_created_at
remove_column :users, :sign_in_count
remove_column :users, :current_sign_in_at
remove_column :users, :last_sign_in_at
remove_column :users, :current_sign_in_ip
remove_column :users, :last_sign_in_ip
remove_column :users, :failed_attempts
remove_column :users, :unlock_token
remove_column :users, :locked_at
end
end
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