show.html.erb上的Ruby on Rails项目加载回滚

Question

我不明白为什么会发生这种情况，似乎尽管找到了friendly.id，但仍在查询文章的id。对于我点击的任何文章，找到的ID都是"0“，即使在与评论关联时找到了正确的article_id (59)。

Processing by ArticlesController#show as HTML
  Parameters: {"id"=>"javascript-8"}
  User Load (0.6ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2  [["id", 1], ["LIMIT", 1]]
  Article Load (0.7ms)  SELECT  "articles".* FROM "articles" WHERE "articles"."slug" = $1 LIMIT $2  [["slug", "javascript-8"], ["LIMIT", 1]]
   (1.9ms)  BEGIN
  Article Load (0.3ms)  SELECT  "articles".* FROM "articles" WHERE "articles"."id" = $1 LIMIT $2  [["id", 0], ["LIMIT", 1]]
   (1.1ms)  ROLLBACK
  Rendering articles/show.html.erb within layouts/application
  Rendered comments/_comment_form.html.erb (19.3ms)
  Comment Load (0.7ms)  SELECT "comments".* FROM "comments" WHERE "comments"."article_id" = 59 ORDER BY created_at DESC
  Rendered comments/_comment.html.erb (25.2ms)

编辑:文章控制器

class ArticlesController < ApplicationController
    before_action :authenticate_user!
    before_action :set_article, only: [:show, :edit, :update, :destroy, :toggle_vote]
    impressionist :actions=>[:show]

  def show
    @article_categories = @article.categories
    @comments = Comment.where(article_id: @article).order("created_at DESC")

    if @article.status == "draft" && @article.user != current_user
      redirect_to root_path
    end
  end

  private

    def set_article
      @article = Article.friendly.find(params[:id])
    end

end

Answer 1

friendly_id :foo，使用：:slugged #你必须使用MyClass.friendly.find('bar')

或者..。

friendly_id :foo，使用：:slugged，:finders #你现在可以使用MyClass.find('bar')

在你的情况下

def set_article
  @article = Article.friendly.find(params[:id])
end

Answer 2

那是因为我用的是印象派宝石。

我应该删除

impressionist :actions=>[:show] 

在控制器的顶部，而不是在show中添加这个

def show
  impressionist(@article)
end

正如印象派gem使用指南(https://github.com/charlotte-ruby/impressionist#usage)中所写的，“如果你使用的是friendly_id，请确保以这种方式登录印象派，因为参数:id将返回一个字符串(Url slug)，而impressionable_id是数据库中的一个整型列。”