我正在尝试将用户数据播种到我的rails项目中。我使用Nitrous.io，我可以通过在控制台中输入以下内容来设置新用户
rails console
然后在控制台中执行以下
2.1.1 :001 > u = User.new
=> #<User id: nil, username: nil, email: nil, password_hash: nil, password_salt: nil, admin: nil, points: nil, leagues: nil>
2.1.1 :002 > u.username = 'testadmin'
=> "testadmin"
2.1.1 :003 > u.email = 'testAdmin@test.com'
=> "testAdmin@test.com"
2.1.1 :004 > u.password = 'test'
=> "test"
2.1.1 :005 > u.password_confirmation = 'test'
=> "test"
2.1.1 :006 > u.admin = true
=> true
2.1.1 :007 > u.save
(86.8ms) BEGIN
User Exists (87.5ms) SELECT 1 AS one FROM "users" WHERE "users"."email" = 'testAdmin@test.com' LIMIT 1
User Exists (86.6ms) SELECT 1 AS one FROM "users" WHERE "users"."username" = 'testadmin' LIMIT 1
SQL (91.7ms) INSERT INTO "users" ("admin", "email", "password_hash", "password_salt", "username") VALUES ($1, $2, $3, $4, $5) RETURNING "id" [["admin", "t"], ["email", "testAdmin @test.com"], ["password_hash", "$2a$10$tVMzM58wjt.lDG6dlsoLQe4obwYzLf3UfUc2ui6MD2eTGAgwTTaQK"], ["password_salt", "$2a$10$tVMzM58wjt.lDG6dlsoLQe"], ["username", "testadmin"]]
(89.3ms) COMMIT
=> true
2.1.1 :008 > Exit
然后我转到项目中的seeds.rb文件并输入以下内容
User.create ({username: 'testadmin2', email: 'testAdmin2@test.com', password: 'test', password_confirmation: 'test', admin: true})
然后我在控制台中运行rake db：seed但得到以下错误：
rake aborted!
ArgumentError: wrong number of arguments (2 for 0..1)
/home/action/workspace/PAW/app/models/user.rb:39:in `initialize'
/home/action/.rvm/gems/ruby-2.1.1/gems/activerecord-4.1.0/lib/active_record/inheritance.rb:30:in `new'
/home/action/.rvm/gems/ruby-2.1.1/gems/activerecord-4.1.0/lib/active_record/inheritance.rb:30:in `new'
/home/action/.rvm/gems/ruby-2.1.1/gems/protected_attributes-1.0.7/lib/active_record/mass_assignment_security/persistence.rb:45:in `create'
/home/action/workspace/PAW/db/seeds.rb:8:in `<top (required)>'
/home/action/.rvm/gems/ruby-2.1.1/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:241:in `load'
/home/action/.rvm/gems/ruby-2.1.1/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:241:in `block in load'
/home/action/.rvm/gems/ruby-2.1.1/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:232:in `load_dependency'
/home/action/.rvm/gems/ruby-2.1.1/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:241:in `load'
/home/action/.rvm/gems/ruby-2.1.1/gems/railties-4.1.0/lib/rails/engine.rb:543:in `load_seed'
/home/action/.rvm/gems/ruby-2.1.1/gems/activerecord-4.1.0/lib/active_record/tasks/database_tasks.rb:184:in `load_seed'
/home/action/.rvm/gems/ruby-2.1.1/gems/activerecord-4.1.0/lib/active_record/railties/databases.rake:173:in `block (2 levels) in <top (required)>'
Tasks: TOP => db:seed
(See full trace by running task with --trace)
我是ruby和rails的新手，所以我可能做了一些愚蠢的事情，但我在过去的两个小时里一直在做这件事而我根本无法解决这个问题。我想要像这样播种数据的原因是因为我想设置一些可以访问某些页面的管理员（一切正常）。为此，我需要设置admin = true。如果我通过网站设置新用户，我就无法选择将用户设置为管理员。我可以通过控制台按照上面的方式完成，但需要很长时间。播种会更快，我也想知道我做错了什么。我将在下面给你一些其他代码。感谢您寻找（并希望有所帮助）
user.rb
class User < ActiveRecord::Base
attr_accessible :email, :username, :password, :password_confirmation
attr_accessor :password
before_save :encrypt_password
validates_confirmation_of :password
validates_presence_of :password, :on => :create
validates_presence_of :email, :on => :create
validates_presence_of :username, :on => :create
validates_uniqueness_of :email
validates_uniqueness_of :username
def self.authenticate_by_email(email, password)
user = find_by_email(email)
if user && user.password_hash == BCrypt::Engine.hash_secret(password, user.password_salt)
user
else
nil
end
end
def self.authenticate_by_username(username, password)
user = find_by_username(username)
if user && user.password_hash == BCrypt::Engine.hash_secret(password, user.password_salt)
user
else
nil
end
end
def encrypt_password
if password.present?
self.password_salt = BCrypt::Engine.generate_salt
self.password_hash = BCrypt::Engine.hash_secret(password, password_salt)
end
end
def initialize(attributes = {})
super # must allow the active record to initialize!
attributes.each do |name, value|
send("#{name}=", value)
end
end
end
authentication_controller.rb
class AuthenticationController < ApplicationController
def sign_in
@user = User.new
end
def login
username_or_email = params[:user][:username]
password = params[:user][:password]
if username_or_email.rindex('@')
email=username_or_email
user = User.authenticate_by_email(email, password)
else
username=username_or_email
user = User.authenticate_by_username(username, password)
end
if user
session[:user_id] = user.id
flash[:notice] = 'Welcome'
redirect_to :root
else
flash.now[:error] = 'Unknown user. Please check your username and password.'
# Assign user to instance variable for the `sign_in` view!
@user = User.new(params[:user])
render :action => "sign_in"
end
end
def signed_out
session[:user_id] = nil
flash[:notice] = "You have been signed out."
end
def new_user
@user = User.new
end
def register
@user = User.new(params[:user])
if @user.valid?
@user.save
session[:user_id] = @user.id
flash[:notice] = 'Welcome.'
redirect_to :root
else
render :action => "new_user"
end
end
end
问题现在回答了。见下文。
答案 0 :(得分：3)
不要在模型（User.rb）
def initialize(attributes = {})
super # must allow the active record to initialize!
attributes.each do |name, value|
send("#{name}=", value)
end
end
这不是必需的。 Rails会自动创建getter和setter方法。
而且，在使用create创建记录时，无需使用{}包装参数。