Rails 3:如何使用 Rails 在数据库中插入记录 [英] Rails 3 : How to insert Record in Database using Rails

问题描述

我是 Rails 的新手，我正在努力学习这项技术，所以如果问题很愚蠢，请原谅.

I am new to Rails , i am trying to learn this technology , so please excuse if the question is dumb .

我使用的是 Rails 3.

I am using Rails 3 .

请告诉我如何在数据库中插入记录.

Please let me know how can i insert a Record in the Database .

我正在使用 postgresql ，下面是我的学生表的表结构.

I am uisng postgresql , and below is my Table structure for the Students Table .

SELECT column_name FROM information_schema.columns WHERE table_name ='Students';

 column_name
-------------
 id
 name
 age
 description
(4 rows)

这是我的控制器文件 student_controller.rb

class StudentController < ApplicationController

  def new
  end

end

这是我的模型文件 student.rb

class Student < ActiveRecord::Base

end

这是我在\app\views\student\new.html.erb下的视图文件

<h1>BookController#new</h1>
<form>
  Id: <input type="text" name="id" /><br />
 Last Name: <input type="text" name="lastname" />
  Age: <input type="text" name="age" />
  Desciption: <input type="text" name="description" />
</form>

当我访问 http://localhost:3000/student/new

请告诉我如何在数据库中插入记录??

Please let me know how can i insert a Record in Database ??

推荐答案

你了解 RESTful 吗?我假设你知道它，除非你能在 rails guide 中找到它(在表单标签中，你必须添加 @student,:action => :new, :method => :post)要添加新记录，只需输入 Student.create(:name=> "a", :age => 2)这个语句由2个句子组成

Do you understand about RESTful? I assume that you know it, unless you can find it in rails guide (In form tag, you must add @student,:action => :new, :method => :post) To add new record, just type Student.create(:name=> "a", :age => 2) This statement is composed of 2 sentences

object = Student.new(:name => "a", :age => 2)
object.save

我建议你使用 rails generate scaffold Student 而不是像这样创建一切.然后，在controller,views中阅读这些generate代码，你会理解的很深！:)P/s: 我也是业余的:D

I suggest you use rails generate scaffold Student instead create everything like this. And then, read these generate code in controller, views, you will understand very deeply!:) P/s: i am an amateur too:D

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