Question

我的目标是按总票数对帖子进行排序。正如您在控制器中看到的，首先我按创建的__排序帖子，这有效！但是我想改变它，所以它将按总票数排序。投票来自acts_as_votable gem。哪个与Post

相关联

目前这是我的帖子控制器：

    def index
        # @posts = Post.all.order("created_at DESC") <--This works
        @posts = Post.includes(:votes).order("votes_for.size desc")
    end

当我运行此操作时，我收到以下错误：在Post上找不到名为'votes'的关联;也许你拼错了？

我的猜测是包括在这里不起作用。

当我打开rails控制台时。为了测试关联，我得到以下结果：

@post = Post.first
@post.votes_for.size

这表明我目前有2票。

最后这是我的Post.rb模型

class Post < ActiveRecord::Base
    acts_as_votable
    belongs_to :user
    has_many :comments
    has_attached_file :image, styles: { medium: "700x500>#", small: "350x250>" }
    validates_attachment_content_type :image, content_type: /\Aimage\/.*\Z/
end

提前致谢!!! （我正在使用psql）

添加架构：

 create_table "posts", force: :cascade do |t|
    t.string   "title"
    t.string   "link"
    t.text     "description"
    t.datetime "created_at",         null: false
    t.datetime "updated_at",         null: false
    t.integer  "user_id"
    t.string   "image_file_name"
    t.string   "image_content_type"
    t.integer  "image_file_size"
    t.datetime "image_updated_at"
  end

  create_table "users", force: :cascade do |t|
    t.string   "email",                  default: "", null: false
    t.string   "encrypted_password",     default: "", null: false
    t.string   "reset_password_token"
    t.datetime "reset_password_sent_at"
    t.datetime "remember_created_at"
    t.integer  "sign_in_count",          default: 0,  null: false
    t.datetime "current_sign_in_at"
    t.datetime "last_sign_in_at"
    t.string   "current_sign_in_ip"
    t.string   "last_sign_in_ip"
    t.datetime "created_at",                          null: false
    t.datetime "updated_at",                          null: false
    t.string   "name"
  end

  add_index "users", ["email"], name: "index_users_on_email", unique: true, using: :btree
  add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true, using: :btree

  create_table "votes", force: :cascade do |t|
    t.integer  "votable_id"
    t.string   "votable_type"
    t.integer  "voter_id"
    t.string   "voter_type"
    t.boolean  "vote_flag"
    t.string   "vote_scope"
    t.integer  "vote_weight"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

  add_index "votes", ["votable_id", "votable_type", "vote_scope"], name: "index_votes_on_votable_id_and_votable_type_and_vote_scope", using: :btree
  add_index "votes", ["voter_id", "voter_type", "vote_scope"], name: "index_votes_on_voter_id_and_voter_type_and_vote_scope", using: :btree

  add_foreign_key "comments", "posts"
  add_foreign_key "comments", "users"
end

Rails按关联顺序排列

0 个答案: