Ruby on Rails - 对数据库数据进行排序，然后根据排序顺序编辑每行数据

发布于 2024-10-25 02:29:13 字数 713 浏览 6 评论 0原文

这就是我想要做的：

选择数据库表“applicants”中的所有行，然后根据“points”列降序排序。
从上到下逐一编辑每行的“reservedIn”列。

我正在使用 MySQLServer 5.5，并使用 HeidiSQL。我还使用 Ruby 1.9.2、Rubygems 1.4.2，但无法识别 Ruby on Rails 版本。我在一月份早些时候安装了它。

谢谢你！

更新：

您好！我一直在研究从下面的评论中学到的东西，然后我想出了这个（练习功能，不是最终的）！它应该选择所有申请人，按指定的顺序排序，然后将他们所有的 mName 更改为“X”。这不起作用！怎么了？谁能告诉我吗？

def generateReservations
if !session[:user_id]
    redirect_to :controller =>'user', :action=> 'login'
else
    @applicants = Applicant.find(:all, :order => "points DESC, sName, fName, mName ")
    #respond_to do |applicant|
    @applicants.each do
    mName = 'X'
    end
end
end

原文

Here's what I want to do:

Select all rows in the database table 'applicants' and then sort according to the column 'points' in descending order.
One by one, from top to bottom, edit the 'reservedIn' column of each row.

I'm using MySQLServer 5.5, using with it HeidiSQL. I'm also using Ruby 1.9.2, Rubygems 1.4.2 and I can't identify the Ruby on Rails version. I had it installed earlier this January.

Thank you!

Update:

Hello again! I've been studying what I've learned from the comments below and I came up with this (practice function, not final)! It's supposed to select all applicants, sorted in the order specified, and then change all their mNames into 'X'. It doesn't work! What's wrong? Can anyone tell?

def generateReservations
if !session[:user_id]
    redirect_to :controller =>'user', :action=> 'login'
else
    @applicants = Applicant.find(:all, :order => "points DESC, sName, fName, mName ")
    #respond_to do |applicant|
    @applicants.each do
    mName = 'X'
    end
end
end

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拒绝两难 2024-11-01 02:29:13

Applicants.order("points DESC")
我无法提供添加 link_to("Edit", edit_applicant_path(applicant))

我的观点，例如

<% Applicants.order("points DESC").each do |applicant| %>
   <%= applicant.title %> <%= link_to("Edit applicant", edit_applicant_path(applicant)) %>
<% end %>

类似的东西

Applicants.order("points DESC")
I cant offer to add link_to("Edit", edit_applicant_path(applicant))

I your view, for example

<% Applicants.order("points DESC").each do |applicant| %>
   <%= applicant.title %> <%= link_to("Edit applicant", edit_applicant_path(applicant)) %>
<% end %>

Something like that

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