Iggy Iggy - 2 months ago 10x
Ruby Question

ArgumentError when using Devise and has_secure_password together

I had a working model prior to adding Devise gem. After I installed Devise and ran

rails generate devise User
, I started having this error.

Whenever I go to rails console and typed



User.create(username: "Iggy1", email: "iggy1@gmail.com", password: "helloworld", password_confirmation: "helloworld")

It always returns

User Load (0.3ms) SELECT "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT 1
ArgumentError: wrong number of arguments (0 for 1)
from /Users/iggy/.rvm/gems/ruby-2.2.2/gems/devise-4.2.0/lib/devise/models/database_authenticatable.rb:146:in `password_digest'
from /Users/iggy/.rvm/gems/ruby-2.2.2/gems/activemodel-4.2.5/lib/active_model/serialization.rb:108:in `block in serializable_hash'
from /Users/iggy/.rvm/gems/ruby-2.2.2/gems/activemodel-4.2.5/lib/active_model/serialization.rb:108:in `each'
from /Users/iggy/.rvm/gems/ruby-2.2.2/gems/activemodel-4.2.5/lib/active_model/serialization.rb:108:in `serializable_hash'
from /Users/iggy/.rvm/gems/ruby-2.2.2/gems/activerecord-4.2.5/lib/active_record/serialization.rb:17:in `serializable_hash'
from /Users/iggy/.rvm/gems/ruby-2.2.2/gems/devise-4.2.0/lib/devise/models/authenticatable.rb:114:in `serializable_hash'
from /Users/iggy/.rvm/gems/ruby-2.2.2/gems/devise-4.2.0/lib/devise/models/authenticatable.rb:120:in `inspect'
from /Users/iggy/.rvm/gems/ruby-2.2.2/gems/railties-4.2.5/lib/rails/commands/console.rb:110:in `start'
from /Users/iggy/.rvm/gems/ruby-2.2.2/gems/railties-4.2.5/lib/rails/commands/console.rb:9:in `start'
from /Users/iggy/.rvm/gems/ruby-2.2.2/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:68:in `console'
from /Users/iggy/.rvm/gems/ruby-2.2.2/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /Users/iggy/.rvm/gems/ruby-2.2.2/gems/railties-4.2.5/lib/rails/commands.rb:17:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'

I kept getting
wrong number of arguments (0 for 1)
error. I can understand it returns argument error for
method (maybe I specified less parameters), but I don't understand why it shows that error on

Here is what I have:


def new
@user = User.new

def create
@user = User.new(user_params)

def user_params
params.require(:user).permit(:name, :email, :password, :password_confirmation)


create_table "users", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "password_digest"
t.string "email", default: "", null: false
t.string "encrypted_password", default: "", null: false
t.string "reset_password_token"
t.datetime "reset_password_sent_at"
t.datetime "remember_created_at"
t.integer "sign_in_count", default: 0, null: false
t.datetime "current_sign_in_at"
t.datetime "last_sign_in_at"
t.string "current_sign_in_ip"
t.string "last_sign_in_ip"

user.rb (model)

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

has_many :lists
has_many :items, through: :lists

There is at least a user in the DB. On localhost index, it shows (I am using serializer):


I also has
on model. Could that be the cause? I was not sure if
is compatible with
. How can I fix it so I can create user on rails console?

If you need more code snippet, please let me know!


If you look at the docs, you can see what has_secure_password does:

Adds methods to set and authenticate against a BCrypt password. This mechanism requires you to have a password_digest attribute.

You don't have the password_digest attribute, hence the error.

But the real issue is that if you're using Devise, you don't need has_secure_password at all. It is usually used if you want to roll your own authentication, Devise already takes care of encrypting and storing the passwords. Remove it from the model and everything should work.