所以，我有一个应用程序，用户可以在其中进行大量的社交分享。因此，链接必须看起来很漂亮。
我已经安装了friendly_id gem
但似乎收到此错误：
NameError in SongsController#index
uninitialized constant Song::FriendlyId
class Song < ActiveRecord::Base
extend FriendlyId
friendly_id :title, use: :slugged
song.rb 片段
class Song < ActiveRecord::Base
extend FriendlyId
friendly_id :title, use: :slugged
歌曲控制器片段
class SongsController < ApplicationController
before_filter :authenticate_user!, only: [:create ,:edit, :update, :destroy, :vote_for_song]
before_action :set_song, only: [:show, :edit, :update, :destroy, :vote_for_song]
def index
if params[:query].present?
@songs = Song.search(params)
get_last_song
elsif params[:genre]
@songs = Song.tagged_with(params[:genre]).paginate(:page => params[:page], :per_page => 15)
get_last_song
else
@songs = Song.order('id').order('plusminus desc nulls last').paginate(:page => params[:page], :per_page => 15)
#@songs = Song.tally.paginate(:page => params[:page], :per_page => 15)
get_last_song
end
end
def set_song
@song = Song.friendly.find(params[:id])
end
def song_params
params.require(:song).permit(:title, :artist, :url, :track, :user_id, :tag_list, :query, :genre, :genre_names, )
end
end
schema.rb 片段
create_table "songs", force: true do |t|
t.string "title"
t.string "artist"
t.text "url"
t.string "track_file_name"
t.string "track_content_type"
t.integer "track_file_size"
t.datetime "track_updated_at"
t.integer "user_id"
t.datetime "created_at"
t.datetime "updated_at"
t.integer "plusminus"
t.string "slug"
end
add_index "songs", ["slug"], name: "index_songs_on_slug", unique: true, using: :btree
create_table "friendly_id_slugs", force: true do |t|
t.string "slug", null: false
t.integer "sluggable_id", null: false
t.string "sluggable_type", limit: 40
t.string "scope"
t.datetime "created_at"
end