Rubin auf Schienen Filterung pg_search_scope v2.2

Ich bin sehr neu in Ruby on Rails und ich brauche Hilfe, herauszufinden, wie eine bestehende DB-Abfrage zu ändern. Ich verwende alte Versionen, die ich kann nicht aktualisiert werden: Rubin 2.2.3p173 und Rails 4.0.2.

Ich möchte die bestehenden Abfrageergebnisse filtern Datensätze zu entfernen, die haben noch keine Videos. Die Modellhierarchie ich denke, ist: Artist, AlbumGroup, Album, Titel, Video.

Zur Klarstellung: Ich mag Künstler mit mindestens 1 Video, aus dem Modell Verein Künstler-> AlbumGroup-> Fotoalben-> Tracks-> Videos (nicht Künstler-> Videos).

Die vorhandene Abfrage wird in Modell Künstler enthalten:

require_dependency tagging
require_dependency similar
class Artist < ActiveRecord::Base
  has_many :images, dependent: :destroy
  has_many :taggings, dependent: :destroy
  has_many :artforms, through: :taggings
  has_many :similars, foreign_key: similar_id, dependent: :destroy
  has_many :similar_artists, through: :similars, source: :similar_to
  has_many :reverse_similars, foreign_key: similar_to_id, class_name: Similar, dependent: :destroy
  has_many :similar_to_artists, through: :reverse_similars, source: :similar
  has_many :memberships, foreign_key: member_id, dependent: :destroy
  has_many :groups, through: :memberships, source: :membership
  has_many :group_members, foreign_key: membership_id, class_name: Membership, dependent: :destroy
  has_many :members, through: :group_members, source: :member
  has_many :users, through: :followed_artists
  has_many :videos, dependent: :destroy
  has_many :audios, dependent: :destroy
  has_many :metrics, through: :audios
  has_many :releases, foreign_key: 'artist_id', class_name: AlbumGroup
  has_many :albums
  has_many :collaborations
  has_many :album_groups, through: :collaborations
  mount_uploader :mugshot, MugshotUploader
  include PgSearch
  pg_search_scope :for_name,
      against: :name,
      using: { tsearch: {threshold: '1', dictionary: 'simple', tsvector_column: 'tsv_name', prefix: true, normalization: 2}},
      ranked_by: (artists.popularity / 50 * :tsearch) + :tsearch
end

Ich möchte so etwas wie die folgenden hinzufügen, um die Datensätze zu filtern aus, die haben noch keine Videos: (auf die Abfrage):

if: artist.releases.albums.tracks.videos.count > 1

Oder der Künstler Modell vielleicht ?:

scope :valid, -> {where(video_count > 1)}

Der andere Code für die verschiedenen Modelle ist unter:

class AlbumGroup < ActiveRecord::Base
  belongs_to :artist
  has_many :collaborations
  has_many :artists, through: :collaborations
  has_many :albums
  has_many :taggings, dependent: :destroy
  has_many :artforms, through: :taggings
  mount_uploader :artwork, MugshotUploader
  def as_json options={}
    {
      id: id,
      title: title
    }
  end
end

class Album < ActiveRecord::Base
  belongs_to :album_group
  belongs_to :artist
  has_many :tracks
end

class Track < ActiveRecord::Base
  has_many :playlist_tracks, dependent: :destroy
  has_many :playlists, through: :playlist_tracks
  belongs_to :audio
  belongs_to :video
  has_many :videos
  has_many :audios
  has_many :taggings, dependent: :destroy
  has_many :artforms, through: :taggings
  belongs_to :album
  belongs_to :artist
  default_scope order: position ASC
  after_save :cache_columns

  def cache_columns
    if image_url.nil?
      img = album.album_group.artwork_url(:tiny)
      unless img.nil?
        update_column(:image_url,img)
      end
    end
    if artist_name.nil?
      if artist_id
        name = Artist.find(artist_id).name
        update_column(:artist_name,name)
      end
    end
    if album_name.nil?
      if album_id
        title = Album.find(album_id).title
        update_column(:album_name,title)
      end
    end
  end
end

class Video < ActiveRecord::Base
  belongs_to :artist
  belongs_to :event
  belongs_to :track
  has_many :tracks
  has_many :playlists, through: :tracks, order: tracks.position ASC
  scope :valid, -> {where(flag_count < 2).order(score DESC) }
  scope :flagged, -> {where(flag_count > ?, 1) }
#   validates :url, uniqueness: {scope: :artist_id}
end