索引输出不在.html.erb文件中的内容 [英] index outputs content that isn't in the .html.erb file

问题描述

我在rails教程中使用ruby来构建一个使用数据库表的简单应用程序，出于某种原因，我的主页输出超出了应有的效果。它创建这个数组，看起来像使用提示进行数据库查询并将其放在页面上。我很确定问题出在我的index.html.erb文件（如果我清空文件并重新加载奇怪的内容不存在），但我无法弄清楚发生了什么。 这里是什么发生的截图。

 控制器代码：
 class BooksController< ApplicationController 
 def new 
 @page_title ='Add Book'
 @book = Book.new 
 @category = Category.new 
 @author = Author.new 
 @publisher = Publisher.new 
结束
 
 def创建
 @book = Book.new（book_params）
 @ book.save 
 
 redirect_to books_path 
结束
 
 def更新
结束
 
 def编辑
结束
 
 def destroy 
 end 
 
 def index 
 @books = Book.all 
 end 
 
 def show 
 end 
 
私人
 def book_params 
 params.require（：book）.permit（：title，：category_id，：author_id，：publisher_id，：isbn，：price，：buy，：format，：摘录， ：pages，：year，：coverpath）
结束
结束
  

html：

 < div id =books-index> 
 <％@ books.each_slice（4）do | book | ％GT; 
< div class =row> 
<％= book.each do | book | ％GT; 
< div class =col-md-3 col-sm-3> 
< h3><％= book.title％>< / h3> 
<％= image_tag（book.coverpath）％> 
 <％= link_to'Read More'，book_path（book），class：'btn btn-primary'％> 
< / div> 
<％end％> 
< / div> 
<％end％> 
< / div> 
  

我是ruby和ruby的新手，所以如果我需要发布更多资源或信息为了让我的问题更清楚，请让我知道。感谢您的帮助

解决方案

您应该将 book.each <％标记，而不是<％= 标记：

 <％books.each do | book | ％GT; 
  

现在，您输出 books.each （它是 books 数组）到你的HTML中。

I'm following a ruby on rails tutorial to build a simple application using database tables and for some reason my home page outputs more than it should. It creates this array that looks like a database query made with prompt and puts it on the page. I'm pretty sure the problem is with my index.html.erb file (if I empty the file and reload the weird content isn't there), but I can't figure out what's going on. Here's a screenshot of what happens.

controller code:
class BooksController < ApplicationController
  def new
    @page_title = 'Add Book'
    @book = Book.new
    @category = Category.new
    @author = Author.new
    @publisher = Publisher.new
  end

  def create
    @book = Book.new(book_params)
    @book.save

    redirect_to books_path
  end

  def update
  end

  def edit
  end

  def destroy
  end

  def index
    @books = Book.all
  end

  def show
  end

  private
    def book_params
      params.require(:book).permit(:title, :category_id, :author_id, :publisher_id, :isbn, :price, :buy, :format, :excerpt, :pages, :year, :coverpath)
    end
end

html:

<div id= "books-index">
    <% @books.each_slice(4) do |book| %>
        <div class = "row">
            <%= book.each do |book| %>
                <div class="col-md-3 col-sm-3">
                    <h3><%= book.title %></h3>
                    <%= image_tag(book.coverpath) %>
                    <%= link_to 'Read More', book_path(book), class:'btn btn-primary' %>
                </div>
            <% end %>
        </div>
    <% end %>
</div>

I am new to ruby and ruby on rails, so if I need to post any more resources or info in order to make my question clearer please let me know. Thanks for the help

解决方案

You should put book.each call inside of <% tag, instead of <%= tag:

<% books.each do |book| %>

Now, you print the result of books.each (which is books array) into your HTML.

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