Ruby on rails Mongoid中使用slug数组查询嵌入式文档

我有3个模型，它们都使用了gem——从模型标题字段创建一个_slugs字段

我有一篇文章的slug，我需要找到它所属的问题。我尝试了很多东西，但似乎都不管用

关于如何正确查询以获取我的文章slug中文章的问题，有什么建议吗？

不起作用的查询：

p = Publication.find("my-publication")
p.issues.where(:'articles._slugs'.in => ["an-article-slug"]).first

class Publication
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :live, type: Boolean, default: false
  field :show_walkthrough, type: Boolean, default: true
  field :subscription_duration, type: String, default: "Subscription Duration"
  field :subscription_price, type: String, default: "Price"
  field :sell_issues_separately, type: String, default: "Individual Issue Sale"
  field :issue_price, type: String, default: "Price"
  field :previewed_on_device, type: Boolean, default: false
  field :shareable, type: String, default: "Make Articles Shareable Online"
  field :urban_airship_key, type: String
  field :urban_airship_secret, type: String
  field :urban_airship_master_secret, type: String

  # 3. Set attributes accesible
  attr_accessible :title, :description, :live, :published, :show_walkthrough, :subscription_duration, :subscription_price, :sell_issues_separately, :issue_price, :cover_image_attributes, :logo_image_attributes, :shareable, :urban_airship_key, :urban_airship_secret, :urban_airship_master_secret

  # 4. Set slug
  slug :title, reserve: ['new', 'edit', 'walkthrough', 'email', 'previewer', 'privacy', 'support', 'manifest', 'feed', 'demo', 'existence', 'switch']

   # 5. Set associations
  belongs_to :user
  embeds_many :issues, order: :created_at.desc, cascade_callbacks: true

end

class Issue
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :last_push_at, type: DateTime, default: Time.now
  field :published_at, type: DateTime, default: Time.now
  field :no, type: Integer, default: 0
  field :color, type: String
  field :free, type: Boolean, default: false


  # 3. Set attributes accesible
  attr_accessible :title, :description, :published, :last_push_at, :published_at, :no, :color, :free, :cover_image_attributes

  # 4. Set slug
  slug :title, scope: :publication, reserve: ['new', 'edit', 'publish', 'update_order']

  # 5. Set associations
  embedded_in :publication
  embeds_many :articles, :as => :articleable, :class_name => 'Article', cascade_callbacks: true, order: :no.desc
  embeds_one :cover_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true

end

class Article
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :author, type: String
  field :lead, type: String
  field :body, type: String
  field :no, type: Integer

  # 3. Set attributes accesible
  attr_accessible :title, :author, :lead, :body, :no, :article_image_attributes, :article_images_attributes, :article_images_attributes

  # 4. Set slug
  slug :title, scope: :articleable

  # 5. Set associations
  embedded_in :articleable, polymorphic: true
  embeds_one :article_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true
  embeds_many :article_images, :as => :imageable, :class_name => 'Image', cascade_callbacks: true

end

出版模式：

p = Publication.find("my-publication")
p.issues.where(:'articles._slugs'.in => ["an-article-slug"]).first

class Publication
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :live, type: Boolean, default: false
  field :show_walkthrough, type: Boolean, default: true
  field :subscription_duration, type: String, default: "Subscription Duration"
  field :subscription_price, type: String, default: "Price"
  field :sell_issues_separately, type: String, default: "Individual Issue Sale"
  field :issue_price, type: String, default: "Price"
  field :previewed_on_device, type: Boolean, default: false
  field :shareable, type: String, default: "Make Articles Shareable Online"
  field :urban_airship_key, type: String
  field :urban_airship_secret, type: String
  field :urban_airship_master_secret, type: String

  # 3. Set attributes accesible
  attr_accessible :title, :description, :live, :published, :show_walkthrough, :subscription_duration, :subscription_price, :sell_issues_separately, :issue_price, :cover_image_attributes, :logo_image_attributes, :shareable, :urban_airship_key, :urban_airship_secret, :urban_airship_master_secret

  # 4. Set slug
  slug :title, reserve: ['new', 'edit', 'walkthrough', 'email', 'previewer', 'privacy', 'support', 'manifest', 'feed', 'demo', 'existence', 'switch']

   # 5. Set associations
  belongs_to :user
  embeds_many :issues, order: :created_at.desc, cascade_callbacks: true

end

class Issue
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :last_push_at, type: DateTime, default: Time.now
  field :published_at, type: DateTime, default: Time.now
  field :no, type: Integer, default: 0
  field :color, type: String
  field :free, type: Boolean, default: false


  # 3. Set attributes accesible
  attr_accessible :title, :description, :published, :last_push_at, :published_at, :no, :color, :free, :cover_image_attributes

  # 4. Set slug
  slug :title, scope: :publication, reserve: ['new', 'edit', 'publish', 'update_order']

  # 5. Set associations
  embedded_in :publication
  embeds_many :articles, :as => :articleable, :class_name => 'Article', cascade_callbacks: true, order: :no.desc
  embeds_one :cover_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true

end

class Article
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :author, type: String
  field :lead, type: String
  field :body, type: String
  field :no, type: Integer

  # 3. Set attributes accesible
  attr_accessible :title, :author, :lead, :body, :no, :article_image_attributes, :article_images_attributes, :article_images_attributes

  # 4. Set slug
  slug :title, scope: :articleable

  # 5. Set associations
  embedded_in :articleable, polymorphic: true
  embeds_one :article_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true
  embeds_many :article_images, :as => :imageable, :class_name => 'Image', cascade_callbacks: true

end

发行模式：

p = Publication.find("my-publication")
p.issues.where(:'articles._slugs'.in => ["an-article-slug"]).first

class Publication
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :live, type: Boolean, default: false
  field :show_walkthrough, type: Boolean, default: true
  field :subscription_duration, type: String, default: "Subscription Duration"
  field :subscription_price, type: String, default: "Price"
  field :sell_issues_separately, type: String, default: "Individual Issue Sale"
  field :issue_price, type: String, default: "Price"
  field :previewed_on_device, type: Boolean, default: false
  field :shareable, type: String, default: "Make Articles Shareable Online"
  field :urban_airship_key, type: String
  field :urban_airship_secret, type: String
  field :urban_airship_master_secret, type: String

  # 3. Set attributes accesible
  attr_accessible :title, :description, :live, :published, :show_walkthrough, :subscription_duration, :subscription_price, :sell_issues_separately, :issue_price, :cover_image_attributes, :logo_image_attributes, :shareable, :urban_airship_key, :urban_airship_secret, :urban_airship_master_secret

  # 4. Set slug
  slug :title, reserve: ['new', 'edit', 'walkthrough', 'email', 'previewer', 'privacy', 'support', 'manifest', 'feed', 'demo', 'existence', 'switch']

   # 5. Set associations
  belongs_to :user
  embeds_many :issues, order: :created_at.desc, cascade_callbacks: true

end

class Issue
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :last_push_at, type: DateTime, default: Time.now
  field :published_at, type: DateTime, default: Time.now
  field :no, type: Integer, default: 0
  field :color, type: String
  field :free, type: Boolean, default: false


  # 3. Set attributes accesible
  attr_accessible :title, :description, :published, :last_push_at, :published_at, :no, :color, :free, :cover_image_attributes

  # 4. Set slug
  slug :title, scope: :publication, reserve: ['new', 'edit', 'publish', 'update_order']

  # 5. Set associations
  embedded_in :publication
  embeds_many :articles, :as => :articleable, :class_name => 'Article', cascade_callbacks: true, order: :no.desc
  embeds_one :cover_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true

end

class Article
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :author, type: String
  field :lead, type: String
  field :body, type: String
  field :no, type: Integer

  # 3. Set attributes accesible
  attr_accessible :title, :author, :lead, :body, :no, :article_image_attributes, :article_images_attributes, :article_images_attributes

  # 4. Set slug
  slug :title, scope: :articleable

  # 5. Set associations
  embedded_in :articleable, polymorphic: true
  embeds_one :article_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true
  embeds_many :article_images, :as => :imageable, :class_name => 'Image', cascade_callbacks: true

end

文章模型：

p = Publication.find("my-publication")
p.issues.where(:'articles._slugs'.in => ["an-article-slug"]).first

class Publication
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :live, type: Boolean, default: false
  field :show_walkthrough, type: Boolean, default: true
  field :subscription_duration, type: String, default: "Subscription Duration"
  field :subscription_price, type: String, default: "Price"
  field :sell_issues_separately, type: String, default: "Individual Issue Sale"
  field :issue_price, type: String, default: "Price"
  field :previewed_on_device, type: Boolean, default: false
  field :shareable, type: String, default: "Make Articles Shareable Online"
  field :urban_airship_key, type: String
  field :urban_airship_secret, type: String
  field :urban_airship_master_secret, type: String

  # 3. Set attributes accesible
  attr_accessible :title, :description, :live, :published, :show_walkthrough, :subscription_duration, :subscription_price, :sell_issues_separately, :issue_price, :cover_image_attributes, :logo_image_attributes, :shareable, :urban_airship_key, :urban_airship_secret, :urban_airship_master_secret

  # 4. Set slug
  slug :title, reserve: ['new', 'edit', 'walkthrough', 'email', 'previewer', 'privacy', 'support', 'manifest', 'feed', 'demo', 'existence', 'switch']

   # 5. Set associations
  belongs_to :user
  embeds_many :issues, order: :created_at.desc, cascade_callbacks: true

end

class Issue
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :last_push_at, type: DateTime, default: Time.now
  field :published_at, type: DateTime, default: Time.now
  field :no, type: Integer, default: 0
  field :color, type: String
  field :free, type: Boolean, default: false


  # 3. Set attributes accesible
  attr_accessible :title, :description, :published, :last_push_at, :published_at, :no, :color, :free, :cover_image_attributes

  # 4. Set slug
  slug :title, scope: :publication, reserve: ['new', 'edit', 'publish', 'update_order']

  # 5. Set associations
  embedded_in :publication
  embeds_many :articles, :as => :articleable, :class_name => 'Article', cascade_callbacks: true, order: :no.desc
  embeds_one :cover_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true

end

class Article
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :author, type: String
  field :lead, type: String
  field :body, type: String
  field :no, type: Integer

  # 3. Set attributes accesible
  attr_accessible :title, :author, :lead, :body, :no, :article_image_attributes, :article_images_attributes, :article_images_attributes

  # 4. Set slug
  slug :title, scope: :articleable

  # 5. Set associations
  embedded_in :articleable, polymorphic: true
  embeds_one :article_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true
  embeds_many :article_images, :as => :imageable, :class_name => 'Image', cascade_callbacks: true

end

更新了新的查询和结果

我可以使用下面@mu的查询建议获取出版物：

p = Publication.find("my-publication")
p.issues.where(:'articles._slugs'.in => ["an-article-slug"]).first

class Publication
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :live, type: Boolean, default: false
  field :show_walkthrough, type: Boolean, default: true
  field :subscription_duration, type: String, default: "Subscription Duration"
  field :subscription_price, type: String, default: "Price"
  field :sell_issues_separately, type: String, default: "Individual Issue Sale"
  field :issue_price, type: String, default: "Price"
  field :previewed_on_device, type: Boolean, default: false
  field :shareable, type: String, default: "Make Articles Shareable Online"
  field :urban_airship_key, type: String
  field :urban_airship_secret, type: String
  field :urban_airship_master_secret, type: String

  # 3. Set attributes accesible
  attr_accessible :title, :description, :live, :published, :show_walkthrough, :subscription_duration, :subscription_price, :sell_issues_separately, :issue_price, :cover_image_attributes, :logo_image_attributes, :shareable, :urban_airship_key, :urban_airship_secret, :urban_airship_master_secret

  # 4. Set slug
  slug :title, reserve: ['new', 'edit', 'walkthrough', 'email', 'previewer', 'privacy', 'support', 'manifest', 'feed', 'demo', 'existence', 'switch']

   # 5. Set associations
  belongs_to :user
  embeds_many :issues, order: :created_at.desc, cascade_callbacks: true

end

class Issue
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :last_push_at, type: DateTime, default: Time.now
  field :published_at, type: DateTime, default: Time.now
  field :no, type: Integer, default: 0
  field :color, type: String
  field :free, type: Boolean, default: false


  # 3. Set attributes accesible
  attr_accessible :title, :description, :published, :last_push_at, :published_at, :no, :color, :free, :cover_image_attributes

  # 4. Set slug
  slug :title, scope: :publication, reserve: ['new', 'edit', 'publish', 'update_order']

  # 5. Set associations
  embedded_in :publication
  embeds_many :articles, :as => :articleable, :class_name => 'Article', cascade_callbacks: true, order: :no.desc
  embeds_one :cover_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true

end

class Article
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :author, type: String
  field :lead, type: String
  field :body, type: String
  field :no, type: Integer

  # 3. Set attributes accesible
  attr_accessible :title, :author, :lead, :body, :no, :article_image_attributes, :article_images_attributes, :article_images_attributes

  # 4. Set slug
  slug :title, scope: :articleable

  # 5. Set associations
  embedded_in :articleable, polymorphic: true
  embeds_one :article_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true
  embeds_many :article_images, :as => :imageable, :class_name => 'Image', cascade_callbacks: true

end

但我无法使用相同的查询获取问题：

p = Publication.find("my-publication")
p.issues.where(:'articles._slugs'.in => ["an-article-slug"]).first

class Publication
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :live, type: Boolean, default: false
  field :show_walkthrough, type: Boolean, default: true
  field :subscription_duration, type: String, default: "Subscription Duration"
  field :subscription_price, type: String, default: "Price"
  field :sell_issues_separately, type: String, default: "Individual Issue Sale"
  field :issue_price, type: String, default: "Price"
  field :previewed_on_device, type: Boolean, default: false
  field :shareable, type: String, default: "Make Articles Shareable Online"
  field :urban_airship_key, type: String
  field :urban_airship_secret, type: String
  field :urban_airship_master_secret, type: String

  # 3. Set attributes accesible
  attr_accessible :title, :description, :live, :published, :show_walkthrough, :subscription_duration, :subscription_price, :sell_issues_separately, :issue_price, :cover_image_attributes, :logo_image_attributes, :shareable, :urban_airship_key, :urban_airship_secret, :urban_airship_master_secret

  # 4. Set slug
  slug :title, reserve: ['new', 'edit', 'walkthrough', 'email', 'previewer', 'privacy', 'support', 'manifest', 'feed', 'demo', 'existence', 'switch']

   # 5. Set associations
  belongs_to :user
  embeds_many :issues, order: :created_at.desc, cascade_callbacks: true

end

class Issue
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :last_push_at, type: DateTime, default: Time.now
  field :published_at, type: DateTime, default: Time.now
  field :no, type: Integer, default: 0
  field :color, type: String
  field :free, type: Boolean, default: false


  # 3. Set attributes accesible
  attr_accessible :title, :description, :published, :last_push_at, :published_at, :no, :color, :free, :cover_image_attributes

  # 4. Set slug
  slug :title, scope: :publication, reserve: ['new', 'edit', 'publish', 'update_order']

  # 5. Set associations
  embedded_in :publication
  embeds_many :articles, :as => :articleable, :class_name => 'Article', cascade_callbacks: true, order: :no.desc
  embeds_one :cover_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true

end

class Article
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :author, type: String
  field :lead, type: String
  field :body, type: String
  field :no, type: Integer

  # 3. Set attributes accesible
  attr_accessible :title, :author, :lead, :body, :no, :article_image_attributes, :article_images_attributes, :article_images_attributes

  # 4. Set slug
  slug :title, scope: :articleable

  # 5. Set associations
  embedded_in :articleable, polymorphic: true
  embeds_one :article_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true
  embeds_many :article_images, :as => :imageable, :class_name => 'Image', cascade_callbacks: true

end

如果我阅读本出版物第一期的第一篇文章，您可以在这里看到_slugs字段：

p = Publication.find("my-publication")
p.issues.where(:'articles._slugs'.in => ["an-article-slug"]).first

class Publication
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :live, type: Boolean, default: false
  field :show_walkthrough, type: Boolean, default: true
  field :subscription_duration, type: String, default: "Subscription Duration"
  field :subscription_price, type: String, default: "Price"
  field :sell_issues_separately, type: String, default: "Individual Issue Sale"
  field :issue_price, type: String, default: "Price"
  field :previewed_on_device, type: Boolean, default: false
  field :shareable, type: String, default: "Make Articles Shareable Online"
  field :urban_airship_key, type: String
  field :urban_airship_secret, type: String
  field :urban_airship_master_secret, type: String

  # 3. Set attributes accesible
  attr_accessible :title, :description, :live, :published, :show_walkthrough, :subscription_duration, :subscription_price, :sell_issues_separately, :issue_price, :cover_image_attributes, :logo_image_attributes, :shareable, :urban_airship_key, :urban_airship_secret, :urban_airship_master_secret

  # 4. Set slug
  slug :title, reserve: ['new', 'edit', 'walkthrough', 'email', 'previewer', 'privacy', 'support', 'manifest', 'feed', 'demo', 'existence', 'switch']

   # 5. Set associations
  belongs_to :user
  embeds_many :issues, order: :created_at.desc, cascade_callbacks: true

end

class Issue
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :description, type: String
  field :published, type: Boolean, default: false
  field :last_push_at, type: DateTime, default: Time.now
  field :published_at, type: DateTime, default: Time.now
  field :no, type: Integer, default: 0
  field :color, type: String
  field :free, type: Boolean, default: false


  # 3. Set attributes accesible
  attr_accessible :title, :description, :published, :last_push_at, :published_at, :no, :color, :free, :cover_image_attributes

  # 4. Set slug
  slug :title, scope: :publication, reserve: ['new', 'edit', 'publish', 'update_order']

  # 5. Set associations
  embedded_in :publication
  embeds_many :articles, :as => :articleable, :class_name => 'Article', cascade_callbacks: true, order: :no.desc
  embeds_one :cover_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true

end

class Article
  # 1. Include mongoid stuff
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Slug

  # 2. Define fields
  field :title, type: String
  field :author, type: String
  field :lead, type: String
  field :body, type: String
  field :no, type: Integer

  # 3. Set attributes accesible
  attr_accessible :title, :author, :lead, :body, :no, :article_image_attributes, :article_images_attributes, :article_images_attributes

  # 4. Set slug
  slug :title, scope: :articleable

  # 5. Set associations
  embedded_in :articleable, polymorphic: true
  embeds_one :article_image, :as => :imageable, :class_name => 'Image', cascade_callbacks: true, autobuild: true
  embeds_many :article_images, :as => :imageable, :class_name => 'Image', cascade_callbacks: true

end

---

我做错了什么？在获取出版物时，查询似乎工作得很好。为什么在抓住问题时它不能很好地工作？

我想我误解了你的问题，对此表示抱歉。你确定你使用的这个slug东西创建了一个slug字段吗？我在

文章

中看到一个

字段：slug

…Arh ya。那是我正在试验的东西。行“slug:title，scope:：article-able”生成一个_slug数组字段，其中包含slug。我又拿走了：slug字段，所以现在我们只剩下_slug字段了。您的查询对于获取发布非常有效。我怎样才能找到这篇文章所属的问题？你能从moped日志中挖掘出这些查询吗？我觉得我错过了一些明显的东西。