为什么要在 rails 中使用 _form.html.erb [英] Why to use _form.html.erb in rails

问题描述

我是 Ruby on Rails 的新手.我使用脚手架为 admin

创建模型视图和控制器

现在我的一位前辈告诉我在 _form.html.erb 中为管理员进行更改.我不知道如何实现它.还有使用/制作的优点或缺点是什么_form.html.erb 与普通方法相比的变化(更改索引、新建、显示和编辑)

我的_form.html.erb如下:-

<%= form_for(@admin) do |f|％＞<% 如果@admin.errors.any?％＞<div id="error_explanation"><h2><%=pluralize(@admin.errors.count, "error") %>禁止保存此管理员:</h2><ul><% @admin.errors.full_messages.each do |msg|％＞<li><%=msg%></li><%结束%>

<%结束%><div class="actions"><%= f.submit %>

<%结束%>

我的管理表如下:-

id 序列号非空，用户名字符变化(20)NOT NULL DEFAULT ''::character变化，电子邮件字符变化(255)，first_name 字符变化(100)，中间名字符变化(100)，姓氏字符变化(100)，指定字符变化(255)，office_phone 字符变化(255)，已删除整数 NOT NULL DEFAULT 0，super_admin boolean NOT NULL DEFAULT false,created_at 时间戳不带时区 NOT NULL，无时区的updated_at 时间戳NOT NULL，约束 admins_pkey PRIMARY KEY (id)

谁能帮我实现这个.提前致谢

解决方案

文件以_"下划线开头，在 rails 中称为部分.它鼓励DRY(不要重复自己)软件开发的原则.您可以重用部分，在这种情况下 _form.html.erb 可用于 new.html.erb 和 edit.html.erb 功能.我们可以在其他 html.erb 文件中渲染部分或在控制器中调用.render :partial =>'partial_name' 在partial_name 中没有下划线.

I am new to Ruby on Rails.I was using scaffold to create models views and controllers for admin

Now one of my seniors has told me to make changes in _form.html.erb for admin.I have no idea how to implement it.Also what is the advantage or disadvantage of using/making changes in _form.html.erb as compared to normal method(make changes in index,new,show and edit)

My _form.html.erb is as follows:-

<%= form_for(@admin) do |f| %>
  <% if @admin.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@admin.errors.count, "error") %> prohibited this admin from being saved:</h2>

      <ul>
      <% @admin.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

My Admin table is as follows:-

id serial NOT NULL,
  username character varying(20) NOT NULL DEFAULT ''::character varying,
  email character varying(255),
  first_name character varying(100),
  middle_name character varying(100),
  last_name character varying(100),
  designation character varying(255),
  office_phone character varying(255),
  deleted integer NOT NULL DEFAULT 0,
  super_admin boolean NOT NULL DEFAULT false,
  created_at timestamp without time zone NOT NULL,
  updated_at timestamp without time zone NOT NULL,
  CONSTRAINT admins_pkey PRIMARY KEY (id)

Can someone help me implement this.Thanks in advance

解决方案

File Starts with "_" underscore called partials in rails. It encourages DRY(Do not repeat yourself) principle of software developement. You can reuse partials and in this case _form.html.erb can be used for both new.html.erb and edit.html.erb functionality. We can render partials in other html.erb files or called within the controllers too. render :partial => 'partial_name' without underscore in the partial_name.

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