Sql 铁路4：为什么是'；在DESC和x27处创建；追加 ；自动地？如何删除它？

虽然我想按文章的平均评分排序记录，但当我选中

development.log

时，

order by created\u at DESC

会自动追加

为什么附加这个条件？我怎样才能删除它

.schema文章

CREATE TABLE "articles" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "content" text(400), "user_id" integer, "created_at" datetime, "updated_at" datetime,"category_id" integer, "rating" real);
CREATE INDEX "index_articles_on_user_id_and_created_at" ON "articles" ("user_id", "created_at");

\model\category.rb

class Category < ActiveRecord::Base
    has_many :articles
    ...
end

---

如果您想要

default\u范围

，但不想将其单独用于特定查询，请在查询中使用

unscoped

。例如：

Article.unscoped.select('*, AVG(rating) AS avg_rate').group(:category_id).order('avg_rate DESC')

---

请您提供所有文章.rb好吗？谢谢您的评论，@maxd。当我再次检查article.rb时，我发现

默认范围->{order（'created_at DESC'）}

存在。lol只是想问你是否有默认范围，我猜你找到了，这是我讨厌默认范围的原因之一

class CategoriesController < ApplicationController

  def index
    @articles = Article.select('*, AVG(rating) AS avg_rate').group(:category_id).order('avg_rate DESC')
  end

    ...

end

Processing by CategoriesController#index as HTML
  [1m[36mArticle Load (1.0ms)[0m  [1mSELECT *, AVG(rating) AS avg_rate FROM "articles" GROUP BY category_id ORDER BY created_at DESC, avg_rate DESC[0m
....

Article.unscoped.select('*, AVG(rating) AS avg_rate').group(:category_id).order('avg_rate DESC')