Rails 4 - best_in_place gem 和多对多关联

Posted 2023-02-15

【中文标题】Rails 4 - best_in_place gem 和多对多关联

【英文标题】：Rails 4 - best_in_place gem and many-to-many association

【发布时间】：2014-02-06 16:57:07

【问题描述】：

我正在努力添加使用 best_in_place（jQuery 就地编辑器 gem）更新联系语言的功能。

我有一个联系人对象、一个语言对象以及联系人和语言之间的 has_and_belongs_to_many :languages 关系。因此，has_and_belongs_to_many 暗示了联系人和语言表之间的连接表。快速总结一下，我有这样的事情：

    contacts             contacts_languages             languages
+------+--------+   +------------+-------------+   +------+------------+
|  id  |  name  |   | contact_id | language_id |   |  id  |    name    |
+------+--------+   +------------+-------------+   +------+------------+
|   1  |  John  |   |     1      |      2      |   |   1  |      EN    | 
|   2  |  Mike  |   |     1      |      3      |   |   2  |      FR    |
|   3  |  Dick  |   |     2      |      1      |   |   3  |      DE    |
+------+--------+   |     3      |      1      |   |   4  |      ES    |
                    |     3      |      5      |   |   5  |      ZH    |
                    |     3      |      6      |   |   6  |      JP    |
                    +------------+-------------+   +------+------------+

现在，为了显示和编辑联系语言，我使用了一个表单：

- @contact.languages.uniq.each_with_index do |lang, index|
    = best_in_place lang, :name, type: :select, collection: @all_languages.map  |name| [name.id, name.name] , classes: "#'empty' if lang.blank?"

请注意，我在这里使用的是 slim 模板引擎。

@contact 在控制器中设置为Contact.find(params[:id]) @contact.languages 返回 #language 对象的 ActiveRecord @all_languages 在控制器中设置为Language.order("name ASC")

另外，请注意@contact.language_ids 将打印@contact 的language_id 数组，我使用@contact.update_attributes(language_ids: [1, 2, 3]) 设置联系语言。

上面的当前源代码可用于显示语言，但在更新它们时不起作用，因为 lang 被 best_in_place 用作对象。因此，我最终不会更新 *contacts_languages* 表，而是更新 languages 表，如下所示：

     languages
+------+------------+
|  id  |    name    |
+------+------------+
|   1  |      1     | 
|   2  |      FR    | 
|   3  |      DE    | 
|   4  |      ES    | 
|   5  |      ZH    | 
|   6  |      JP    | 
+------+------------+

其中 name 已替换为应该设置到 contacts_languages 表中的语言的 ID。

您知道如何更新 *contacts_languages* 表来代替已编辑的语言吗？如果可能，一切都使用 best_in_place。

谢谢！

编辑

contact.rb

# == Schema Information
#
# Table name: contacts
#
#  id                    :integer         not null, primary key
#  first_name            :string(255)
#  last_name             :string(255)
#  title                 :string(255)
#  age                   :float
#  gender                :integer
#  active                :integer
#  info                  :text
#  created_at            :datetime        not null
#  updated_at            :datetime        not null
#  user_id               :integer
#  slug                  :string(255)
#  account_id            :integer
#  image                 :string(255)
#  uid                   :integer
#  tracking_friend_token :string(255)
#  tracking_friend_id    :string(255)
#  user_token            :string(255)
#  job_title             :string(255)
#  dob                   :date
#  marital_status        :integer
#

class Contact < ActiveRecord::Base

  include PublicActivity::Model
  tracked except: :destroy, 
          owner: Proc.new |controller, model| controller.current_user ,
          recipient: ->(controller, model)  model && model 

  include PgSearch
  pg_search_scope :search, against: [:first_name, :last_name, :uid],
    associated_against:  email_addresses: :email 

  after_create :set_defaults

  attr_accessible :first_name, :last_name, :title, :age, :gender, :active, :info, :user_id, :type_list, :industry_list, :tag_list, :category_list, :phone_numbers_attributes, :email_addresses_attributes, :social_networks_attributes, :addresses_attributes, :websites_attributes, :instant_messengers_attributes, :company_ids, :language_ids, :user_ids, :slug, :account_id, :image, :uid, :tracking_friend_token, :tracking_friend_id, :job_title, :dob, :marital_status, :children_attributes, :important_dates_attributes, :user_token

  #Will Paginate default
  self.per_page = 100

  acts_as_tenant(:account)
  acts_as_taggable
  acts_as_taggable_on :type, :industries, :categories

  has_many :addresses
  has_many :alerts
  has_many :attachments
  has_many :call_requests
  has_many :children
  has_many :comments
  has_many :contact_companies
  has_many :email_addresses
  has_many :important_dates
  has_many :instant_messengers
  has_many :phone_numbers
  has_many :pushes
  has_many :social_networks
  has_many :websites

  has_many :companies, through: :contact_companies
  has_and_belongs_to_many :languages
  has_and_belongs_to_many :users

  accepts_nested_attributes_for :addresses, :reject_if => proc  |attributes| attributes['address_line_1'].blank? , :allow_destroy => true
  accepts_nested_attributes_for :attachments, :reject_if => proc  |a| a['file'].blank? , :allow_destroy => true
  accepts_nested_attributes_for :children, :reject_if => proc  |a| a['first_name'].blank? , :allow_destroy => true
  accepts_nested_attributes_for :comments, :reject_if => proc  |a| a['comment'].blank? , :allow_destroy => true
  accepts_nested_attributes_for :email_addresses, :reject_if => proc  |a| a['email'].blank? , :allow_destroy => true
  accepts_nested_attributes_for :important_dates
  accepts_nested_attributes_for :instant_messengers, :reject_if => proc  |a| a['name'].blank? , :allow_destroy => true
  accepts_nested_attributes_for :languages, :reject_if => proc  |a| a['iso'].blank? , :allow_destroy => true
  accepts_nested_attributes_for :phone_numbers, :reject_if => proc  |a| a['number'].blank? , :allow_destroy => true
  accepts_nested_attributes_for :social_networks, :reject_if => proc  |a| a['name'].blank? , :allow_destroy => true
  accepts_nested_attributes_for :websites, :reject_if => proc  |a| a['url'].blank? , :allow_destroy => true

  validates :first_name, :presence => true
  validates :last_name,  :presence => true
  validates :active,     :presence => true

  def reference_id
    "ID-USR-000000#self.id"
  end

  def fullname
    "#first_name.titleize #last_name.titleize"
  end

  def set_defaults
    type_list = "Customer" unless self.type_list.present?
    language_ids = 1 unless self.language_ids.present?
    self.update_attributes(language_ids: language_ids, type_list: type_list)
  end

  #Postgres fulltext search
  def self.text_search(query)
    if query.present?
      search(query)
    else
      scoped
    end
  end

end

language.rb

# == Schema Information
#
# Table name: languages
#
#  id         :integer         not null, primary key
#  name       :string(255)
#  iso        :string(255)
#  contact_id :integer
#  company_id :integer
#  created_at :datetime        not null
#  updated_at :datetime        not null
#

class Language < ActiveRecord::Base

  attr_accessible :name, :iso

  has_and_belongs_to_many :contacts

  validates :name,  presence: true, uniqueness: true
  validates :iso,   presence: true, uniqueness: true

  default_scope order("name ASC")

end

【问题讨论】：

能否给出contact.rb和language.rb的型号代码？

好吧，给我几个，我会帮忙的

刚刚添加到我原来的问题中。谢谢！

【参考方案1】：

我认为以下可能是您最好的选择。我尝试以更“Rails”的方式进行操作，但 BIP 不允许这样做。

查看

    <% @contact.languages.uniq.each_with_index do |lang, index| %>
     <%= best_in_place lang, :id, 
         type: :select, 
         path: "/contacts/bip/#@contact.id/#lang.id",
         collection: @all_languages.map  |i| [i.id, i.name]  %> 
   <% end %>

contacts_controller

def bip
    @contact = Contact.find(params[:c_id])
    ContactsLanguage.where(contact_id: params[:c_id],language_id: params[:l_id]).delete_all
    ContactsLanguage.create! contact_id: params[:c_id], language_id: params[:language][:id]

    respond_to do |format|
      format.json  render json: @contact 
    end

  end

路线

 match '/contacts/bip/:c_id/:l_id' => 'contacts#bip'

【讨论】：

像魅力一样工作！现在我想知道为什么我没有考虑路径指令：/谢谢。

与其查找、删除和重新创建条目，不如使用 first_or_create ？

问题更多的是 BIP。 @Sprachprofi 你的评论更多的是 Rails AntiPatterns

嗨@beck03076，我有一个类似的问题，看起来你的回答可以帮助我，你能检查this question吗？我将非常感激:)