Ruby on rails 我能'；t手动关联Rails控制台中的2个对象，而不会出现NoMethod错误

所以我有两个模型：

User.rb

class User < ActiveRecord::Base

  has_many :pics
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
     :recoverable, :rememberable, :trackable, :validatable
end

---

您必须重新启动/重新加载控制台才能使更改生效

您是否

重新加载你的控制台和更新
图片后的
查找
图片。rb
是的，重新加载控制台似乎不起作用。你也重新加载了模型吗？因为如果你不这么做，那将是老问题不，我怎么能？对不起，我是Rails新手。我试图在控制台中调用User.reload，但收到一个nomethod错误。只需
@pic=pic。首先
即可
class Pic < ActiveRecord::Base
    belongs_to :user
end

2.3.0 :001 > @user = User.first
  User Load (0.2ms)  SELECT  "users".* FROM "users"  ORDER BY "users"."id"   
ASC LIMIT 1
 => #<User id: 1, email: "nono@gmail.com", created_at: "2016-12-20
10:52:10", updated_at: "2016-12-20 10:52:10"> 
2.3.0 :002 > @pic = Pic.first
  Pic Load (0.1ms)  SELECT  "pics".* FROM "pics"  ORDER BY "pics"."id" ASC
LIMIT 1
 => #<Pic id: 1, title: "Yo! My first post!", description: "Wazzaaappp this
is Wali", created_at: "2016-12-20 10:30:45", updated_at: "2016-12-20 
10:30:45", user_id: nil> 
2.3.0 :003 > @pic.user = @user

NoMethodError: undefined method `user=' for #<Pic:0x00000002918758>
Did you mean?  user_id=
    from /usr/local/rvm/gems/ruby-2.3.0/gems/activemodel-
4.2.5/lib/active_model/attribute_methods.rb:433:in `method_missing'
       from (irb):3

ActiveRecord::Schema.define(version: 20161220102651) do

  create_table "pics", force: :cascade do |t|
    t.string   "title"
    t.text     "description"
    t.datetime "created_at",  null: false
    t.datetime "updated_at",  null: false
    t.integer  "user_id"
  end

  add_index "pics", ["user_id"], name: "index_pics_on_user_id"

  create_table "users", force: :cascade do |t|
    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"
    t.datetime "created_at",                          null: false
    t.datetime "updated_at",                          null: false
  end

  add_index "users", ["email"], name: "index_users_on_email", unique: true
  add_index "users", ["reset_password_token"], name:  
  "index_users_on_reset_password_token", unique: true

end