Rails控制台添加nil而不是值 [英] Rails console is adding nil instead of values

问题描述

当前，当尝试通过Rails控制台或种子数据将新用户添加到我的User表时，一切都为零。

Currently when trying to add a new user to my User table via rails console or seed data, everything is nil.

在我的种子文件中，我正在运行：

In my seed file I am running:

u1 = User.create(:from_email => "[e-mail]", :to_email => "[e-mail]", :from_name=>"Vero", :to_name=>"Spencer", :message=>"Test message", :password=>"chicken", :id => 1)
u1.save!

如果我通过rails中的种子数据或通过rails控制台运行它，然后使用User检查Postgres数据库.all我得到：

If I run this via seed data in rails or via rails console and then check the Postgres database with User.all I get:

#<User id: 1, from_name: nil, to_name: nil, from_email: nil, to_email: nil, message: nil, created_at: "2014-12-10 02:34:02", updated_at: "2014-12-10 02:34:02", password: nil>

我已经处理了好几个小时，开始变得很困惑。我们将提供帮助，我们的模型和架​​构如下：

I've been dealing with this for hours, starting to get quite confused. Help would be appreciated, my model and schema is below:

class User < ActiveRecord::Base
attr_accessor :from_name, :from_email, :to_name, :to_email, :message, :password, :id

before_save { self.from_email = from_email.downcase }
before_save { self.to_email = to_email.downcase }
before_save { self.password = "merrychristmas#{ Random.rand(1000) }" }

validates :id, :presence => true, :uniqueness => true
validates :from_name, :presence => true, :uniqueness => false
validates :to_name, presence: true, :uniqueness => false
validates :from_email, presence: true, format: { with: /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i}
validates :to_email, presence: true, format: { with: /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i }
validates :message, presence: true, length: { maximum: 50 }

def self.authenticate(id, password)
    user = find(id)
if user && user.password
        user
else
        nil
end
end

end

模式：

ActiveRecord::Schema.define(version: 20141209104326) do

  # These are extensions that must be enabled in order to support this database
  enable_extension "plpgsql"

  create_table "users", force: true do |t|
    t.string   "from_name"
    t.string   "to_name"
    t.string   "from_email"
    t.string   "to_email"
    t.text     "message"
    t.datetime "created_at"
    t.datetime "updated_at"
    t.string   "password"
  end

end

SQL

(0.3ms)  BEGIN
  User Exists (0.5ms)  SELECT  1 AS one FROM "users"  WHERE "users"."id" = 2 LIMIT 1
  SQL (0.4ms)  INSERT INTO "users" ("created_at", "updated_at") VALUES ($1, $2) RETURNING "id"  [["created_at", "2014-12-10 04:15:33.579478"], ["updated_at", "2014-12-10 04:15:33.579478"]]
   (6.5ms)  COMMIT
=> #<User id: nil, from_name: nil, to_name: nil, from_email: nil, to_email: nil, message: nil, created_at: "2014-12-10 04:15:33", updated_at: "2014-12-10 04:15:33", password: nil>

推荐答案

您的问题正在使用 attr_accessor 在您的模型中。仅应在要为不想存储在数据库中的对象定义getter / setter方法的地方使用此方法。 请参阅此处以获取更多信息。

Your problem is using attr_accessor in your model. This should only be used where you want to define getter/setter methods for an object which you do not want to store in the database. See here for more information.

删除整个以 attr_accessor 开头的行，您的代码将可用。

Remove the entirety of the line that starts attr_accessor and your code will work.

也删除 id 的赋值以及验证其存在的行。这是由数据库自动处理的。

Also remove the assignment of the id and the line that validates its presence. This is handled automatically by the database.

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