时间戳

首页 > 解决方案 > 我在 Ruby on Rails 网站项目中找不到打印的来源。数组草草地打印在它显示的表格上方

ruby-on-rails - 我在 Ruby on Rails 网站项目中找不到打印的来源。数组草草地打印在它显示的表格上方

问题描述

看起来像这样。正在打印的信息来自它下面的表格创建，我只是无法找到如何在不停止打印表格的情况下停止它。

这是相关代码。

我的项目文件的索引视图

<div class="jumbotron jumbotron-fluid bg-primary">
  <div class="container">
    <h1 class="display-4">Hochschule München Student Projects</h1>
    <p class="lead">This website holds all the student led projects along with information about each of them.</p>
  </div>
</div>

<div class="jumbotron jumbotron-fluid bg-primary">
  <div class="container">
    <h1 class="display-4">Hochschule München Student Projects</h1>
    <p class="lead">This website holds all the student led projects along with information about each of them.</p>
  </div>
</div>

<h1>Listing projects</h1>

<br>

Filter by Professor
<%= collection_select(:project, :project_professor, Project.all.select(:project_professor).uniq, :project_professor, :project_professor, prompt: true) %>

<br> 

<table border="1">
  <tr>
    <th><%= sortable "project_title", "Project Title" %></th>
    <th><%= sortable "project_professor", "Professor" %></th>
    <th><%= sortable "project_partner", "Partner" %></th>
    <th></th>
    <th></th>
    <th></th>
  </tr>

  <%= @projects.each do |project| %>

  <tr>
    <td><%= project.project_title %></td>
    <td><%= project.project_professor%></td>
    <td><%= project.project_partner%></td>
    <td><%= link_to 'Show', project_path(project) %></td>
    <td><%= link_to 'Edit', edit_project_path(project) %></td>
    <td><%= link_to 'Destroy', project_path(project),
            method: :delete,
            data: { confirm: 'Are you sure?' } %></td>
  </tr>

  <% end %>
</table>

<br>

<%= link_to 'New project', new_project_path %>

这是控制器文件。

class ProjectsController < ApplicationController

  helper_method :sort_column, :sort_direction

  def index
    @projects = Project.order(sort_column + " " + sort_direction); 0
  end

  def new
    @project = Project.new
  end

  def create
    @project = Project.new(project_params)

    if @project.save
      redirect_to @project
    else
      render 'new'
    end
  end

  def edit
    @project = Project.find(params[:id])
  end

  def update
    @project = Project.find(params[:id])

    if @project.update(project_params)
      redirect_to @project
    else
      render 'edit'
    end
  end

  def show
    @project = Project.find(params[:id])
  end

  def destroy
    @project = Project.find(params[:id])
    @project.destroy

    redirect_to projects_path
  end

  private
    def project_params
      params.require(:project).permit(:project_title, :project_semester, :project_partner, :project_professor, :project_format, :project_department, :project_description, :project_image, :project_link) 
    end

    def sort_column
      Project.column_names.include?(params[:sort]) ? params[:sort] : "project_title"
    def sort_direction
      %w[asc desc].include?(params[:direction]) ? params[:direction] : "asc"
    end

end

谢谢你的帮助！我这几天一直有这个问题，找不到错误。

标签： ruby-on-railsdebuggingoutput

解决方案

<%= @projects.each do |project| %>



<tr>
    <td><%= project.project_title %></td>
    <td><%= project.project_professor%></td>
    <td><%= project.project_partner%></td>
    <td><%= link_to 'Show', project_path(project) %></td>
    <td><%= link_to 'Edit', edit_project_path(project) %></td>
    <td><%= link_to 'Destroy', project_path(project),
            method: :delete,
            data: { confirm: 'Are you sure?' } %></td>
  </tr>

  <% end %>

在 Erb 中，<%= 用于编写将产生输出的 ruby​​ 代码，而 <% 用于编写不会产生输出的 ruby​​ 代码，例如循环或条件。

尝试像这样编写循环，看看是否有帮助。

<% @projects.each do |project| %>

更多信息：https ://guides.rubyonrails.org/action_view_overview.html#erb

推荐阅读