Rails控制器接收所有参数，但无法正确创建数据库记录

Question

我要开门见山了，根据我的日志文件，当我提交表单创建新记录时，所有参数都发送正确，但是创建记录时有些属性设置失败在数据库中。以下是相关日志条目：

Started POST "/computers" for 192.168.8.70 at 2011-05-19 16:24:31 -0400
  Processing by ComputersController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"agR6MrYbMTbXeR9+Oit0rUzrhcKuhg6p/jpGqQD9MhI=", "show_location_buttons"=>"1", "computer"=>{"vendor_id"=>"1", "new_vendor_name"=>"", "model"=>"Hello", "hostname"=>"Hello", "user_id"=>"", "computer_type"=>"Desktop", "serial_number"=>"", "unh_id"=>"", "doc_id"=>"", "federal"=>"0", "department_id"=>"", "new_department_name"=>"", "security_id"=>"", "purchase_price"=>"", "purchase_date"=>"05/11/2011", "warranty_expiration"=>"05/28/2011", "activity_id"=>"", "new_activity_code"=>"", "condition_id"=>"", "new_condition_name"=>"", "location_id"=>"", "operating_system"=>"Fedora Core", "comments"=>""}, "commit"=>"Create Computer"}
  User Load (0.1ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 48 LIMIT 1
  SQL (0.1ms)  BEGIN
  SQL (0.4ms)  SHOW TABLES
  Computer Load (0.2ms)  SELECT `computers`.`id` FROM `computers` WHERE (`computers`.`hostname` = BINARY 'Hello') LIMIT 1
  Vendor Load (0.1ms)  SELECT `vendors`.* FROM `vendors` WHERE `vendors`.`id` = 1 LIMIT 1
  SQL (0.7ms)  describe `computers`
  AREL (0.3ms)  INSERT INTO `computers` (`vendor_id`, `model`, `hostname`, `computer_type`, `serial_number`, `unh_id`, `doc_id`, `federal`, `department_id`, `security_id`, `purchase_price`, `purchase_date`, `warranty_expiration`, `activity_id`, `condition_id`, `location_id`, `operating_system`, `license_sticker_id`, `comments`, `created_at`, `updated_at`, `user_id`, `delta`) VALUES (1, 'Hello', 'Hello', 'Desktop', '', '', '', 0, NULL, NULL, NULL, '2011-11-05', NULL, NULL, NULL, NULL, 'Fedora Core', NULL, '', '2011-05-19 20:24:31', '2011-05-19 20:24:31', NULL, 1)

如果您仔细观察，会发现“warranty_expiration”参数是在参数哈希中设置的，但是如果您查看日志中的 AREL 行，则会发现数据库中的插入操作会删除 Warranty_expiration 字段的值，并且插入 NULL。我对此完全傻眼了。有什么想法吗？

以下是我的计算机资源的模型和控制器代码：

computer.rbcomputers_controller.rb

  class Computer < ActiveRecord::Base
    before_validation :format_fields

    validates :model, :presence => true
    validates :hostname, :presence => true, :uniqueness => true, :format => { :with => /^[a-zA-Z0-9]{3,25}$/ }
    validates :computer_type, :presence => true
    validates :operating_system, :presence => true

    validate :required_fields_specified

    belongs_to :vendor
    belongs_to :department
    belongs_to :security
    belongs_to :activity
    belongs_to :condition
    belongs_to :location
    belongs_to :license_sticker
    belongs_to :user

    has_many :hardware_addresses, :as => :addressable
    accepts_nested_attributes_for :hardware_addresses, :allow_destroy => true, :reject_if => lambda { |attr| attr[:mac_address].blank? }

    has_many :license_stickers, :dependent => :destroy
    accepts_nested_attributes_for :license_stickers, :allow_destroy => true, :reject_if => lambda { |attr| attr[:key].blank? or attr[:operating_system].blank? }

    has_many :pictures, :as => :imageable, :dependent => :destroy
    accepts_nested_attributes_for :pictures, :allow_destroy => true

    attr_accessor :new_vendor_name
    attr_accessor :new_activity_code
    attr_accessor :new_department_name
    attr_accessor :new_condition_name

    before_save :create_vendor_from_name
    before_save :create_activity_from_code
    before_save :create_department_from_name
    before_save :create_condition_from_name

    OPERATING_SYSTEMS = ["Microsoft Windows XP x86", "Microsoft Windows 7 x86", "Microsoft Windows Server 2003",
                         "Microsoft Windows XP x64", "Microsoft Windows 7 x64", "Microsoft Windows Server 2008 x86",
                         "Microsoft Windows Vista x86", "Microsoft Windows Vista x64", "Microsoft Windows Server 2008 x64",
                         "Ubuntu 8.x", "Ubuntu 9.x", "Ubuntu 10.x", "Fedora Core", "CentOS 5.x x86", "CentOS 4 x86", "IRIX",
                         "MacOS 10.5", "MacOS 10.6", "MacOS 10.7","CentOS 4 x64", "CentOS 5 x64", "ESX 3", "ESX 4", "SUSE"]

    COMPUTER_TYPES = ["Desktop","Laptop","Server"]

    def required_fields_specified
      errors.add_to_base "Specify an existing vendor, or create one." if vendor.blank? and new_vendor_name.blank?
    end

    def create_vendor_from_name
      create_vendor(:name => new_vendor_name) unless new_vendor_name.blank?
    end

    def create_activity_from_code
      create_activity(:code => new_activity_code) unless new_activity_code.blank?
    end

    def create_department_from_name
      create_department(:name => new_department_name) unless new_department_name.blank?
    end

    def create_condition_from_name
      create_condition(:name => new_condition_name) unless new_condition_name.blank?
    end

    def format_fields
      serial_number.upcase!
      hostname.capitalize!
      self.model = self.model.titleize
      unh_id.upcase!
      doc_id.upcase!
    end

    define_index do
      indexes vendor(:name), :as => :vendor_name, :sortable => true
      indexes model, :sortable => true
      indexes hostname, :sortable => true
      indexes computer_type, :sortable => true
      indexes serial_number, :as => :serial, :sortable => true
      indexes operating_system, :as => :os, :sortable => true
      indexes activity(:code), :as => :activity_code
      indexes condition(:name), :as => :condition_name
      indexes department(:name), :as => :department_name
      indexes license_sticker(:key), :as => :license_key
      indexes license_sticker(:operating_system), :as => :licensed_os

      has warranty_expiration, :as => :warranty
      set_property :delta => true
    end

  end

更新：在下面的 Rails 控制台中执行请求

class ComputersController < ApplicationController
  filter_access_to :all

  # GET /computers
  # GET /computers.xml
  def index
    @computers = Computer.search params[:search], :order => sort_column("computer_type"), :sort_mode => sort_direction,
      :per_page => 20, :page => params[:page], :star => true

    respond_to do |format|
      format.html # index.html.erb
      format.js
      format.xml  { render :xml => @computers }
    end
  end

  # GET /computers/1
  # GET /computers/1.xml
  def show
    @computer = Computer.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @computer }
    end
  end

  # GET /computers/new
  # GET /computers/new.xml
  def new
    @computer = Computer.new

    respond_to do |format|
      format.html # new.html.erb
      format.xml  { render :xml => @computer }
    end
  end

  # GET /computers/1/edit
  def edit
    @computer = Computer.find(params[:id])
  end

  # POST /computers
  # POST /computers.xml
  def create
    @computer = Computer.new(params[:computer])

    respond_to do |format|
      if @computer.save
        format.html { redirect_to(@computer, :notice => 'Computer was successfully created.') }
        format.xml  { render :xml => @computer, :status => :created, :location => @computer }
      else
        format.html { render :action => "new" }
        format.xml  { render :xml => @computer.errors, :status => :unprocessable_entity }
      end
    end
  end

  # PUT /computers/1
  # PUT /computers/1.xml
  def update
    @computer = Computer.find(params[:id])

    respond_to do |format|
      if @computer.update_attributes(params[:computer])
        format.html { redirect_to(@computer, :notice => 'Computer was successfully updated.') }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @computer.errors, :status => :unprocessable_entity }
      end
    end
  end

  # DELETE /computers/1
  # DELETE /computers/1.xml
  def destroy
    @computer = Computer.find(params[:id])
    @computer.destroy

    respond_to do |format|
      format.html { redirect_to(computers_url) }
      format.xml  { head :ok }
    end
  end

  private

  # def sort_column
  #   params[:sort] || "computer_type"
  # end

  # def sort_direction
  #   if params[:direction].nil?
  #     :asc
  #   else
  #     params[:direction].to_sym
  #   end
  # end
end

的行的结果。

ruby-1.9.2-p180:002>> 计算机.创建！ “vendor_id”=>“1”， "new_vendor_name"=>"", “型号”=>“你好”，“主机名”=>“Heo”， "user_id"=>"", "computer_type"=>"桌面", “serial_number”=>“”，“unh_id”=>“”， “doc_id”=>“”，“联邦”=>“0”， "department_id"=>"", "new_department_name"=>"", “security_id”=>“”， “购买价格”=>“”， “购买日期”=>“2011 年 5 月 11 日”, "warranty_expiration"=>"05/28/2011", “activity_id”=>“”， “new_activity_code”=>“”， "condition_id"=>"", "new_condition_name"=>"", "location_id"=>"", "operating_system"=>"Fedora Core", “评论”=>“”Sphinx 0.9.9-release (r2117) 版权所有 (c) 2001-2009， 安德鲁·阿克肖诺夫

使用配置文件 '/opt/intranet3-dev/config/development.sphinx.conf'... 索引索引'computer_delta'... 收集了 2 个文档，0.0 MB 排序 0.0 Mhits，完成 100.0% 总共 2 个文档，62 字节总数 0.016 秒，3724 字节/秒， 120.15 文档/秒，总共 20 次读取，0.000 秒，0.0 kb/调用平均值，0.0 毫秒/调用 平均总共 10 次写入，0.000 秒，0.4 kb/呼叫平均值，0.0 毫秒/呼叫平均值 旋转索引：已成功发送 对 searchd 发出 SIGHUP (pid=25435)。 =>

计算机类型：“桌面”， 序列号：“”，unh_id：“”，doc_id： “”，联邦：假，department_id： 无，安全 ID：无，购买价格： 无，购买日期：“2011-11-05”， 保修期：无，活动 ID： 无，condition_id：无，location_id： nil，操作系统：“Fedora Core”， License_sticker_id：无，评论：“”， 创建时间：“2011-05-19 21:17:55”， 更新时间：“2011-05-19 21:17:55”， user_id: nil, delta: true>

感谢您的帮助，

莱斯

Answer 1

在 Rails 控制台中执行此代码

Computer.create! "vendor_id"=>"1", "new_vendor_name"=>"", "model"=>"Hello", "hostname"=>"Hello", "user_id"=>"", "computer_type"=>"Desktop", "serial_number"=>"", "unh_id"=>"", "doc_id"=>"", "federal"=>"0", "department_id"=>"", "new_department_name"=>"", "security_id"=>"", "purchase_price"=>"", "purchase_date"=>"05/11/2011", "warranty_expiration"=>"05/28/2011", "activity_id"=>"", "new_activity_code"=>"", "condition_id"=>"", "new_condition_name"=>"", "location_id"=>"", "operating_system"=>"Fedora Core", "comments"=>""

并检查抛出了哪种异常。

Answer 2

Open rails console --sandbox
$ computer = Computer.new
$  computer.model = 'abc'
$  computer.new_vendor_name = 'xyz'
$ Keep adding required column values.
$ now try computer.save
# if it prompts true, then your data has been saved successfully if you get false then you have error in your code.

$ computer.errors.full_messages

#above command will list out,where your failed the validations(added in Model).