一起使用Devise和has_secure_password时出现ArgumentError

Question

在添加Devise gem之前，我有一个工作模型。安装Devise并运行后rails generate devise User，我开始出现此错误。

每当我去Rails控制台输入

User.first

要么

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

它总是返回

  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>'

我不断wrong number of arguments (0 for 1)出错。我可以理解它返回create方法的参数错误（也许我指定的参数更少），但是我不明白为什么它会在上显示该错误User.first。

这是我所拥有的：

users_controller.rb

  ...
  def new
    @user = User.new
  end

  def create
    @user = User.new(user_params)
  end

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


Schema.rb

  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"
  end


user.rb (model)

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

  has_many :lists
  has_many :items, through: :lists
  has_secure_password

数据库中至少有一个用户。在本地主机索引上，它显示（我正在使用序列化程序）：

{"users":[{"id":1,"name":"Iggy1","email":"letsmailiggy@gmail.com","items":[],"lists":[]}]}

我也有has_secure_password模特。那可能是原因吗？我不确定是否has_secure_password与兼容Devise。如何修复它，以便可以在Rails控制台上创建用户？

如果您需要更多代码段，请告诉我！

Answer 1

如果您看一下docs，那么您会看到has_secure_password：

添加用于设置和验证BCrypt密码的方法。此机制要求您具有password_digest属性。

您没有password_digest属性，因此出现错误。

但是真正的问题是，如果您使用的是Devise，则根本不需要has_secure_password。如果要进行自己的身份验证，通常会使用它，Devise已经负责加密和存储密码。将其从模型中删除，一切正常。