Paper_Trail:显示版本之间的差异 [英] Paper_Trail: Show Diff Between Versions

问题描述

我是Rails的新手...使用RubyMine作为IDE.

I'm new to Rails...using RubyMine as an IDE.

我让Paper_Trail保存了数据"xoi_qb"的先前版本.我的视图当前正在显示当前和以前的数据，但是我想显示当前版本"xoi_qb"和先前版本"xoi_qb"之间的差异.例如，当前版本可能是"97"，而先前版本可能是"94"，我想显示"XOI +/-:+3".我想显示这种差异，并根据积极或消极的变化添加"+"或-".

I have Paper_Trail saving previous versions of the data "xoi_qb". My view is currently showing the current and previous data as I'd like, but I would like to show the diff between the current version "xoi_qb" and the previous version "xoi_qb". For instance, the current version may be "97" and the previous version may be "94", and I would like to display "XOI +/-: +3". I would like to display this difference and add the "+" or "-" based on the positive or negative change.

在我的模型中，Paper Trail设置为创建如下版本:

In my model, Paper Trail is set to create versions like this:

  def get_xoi_qb
    xoi_qb = []
    self.versions.each do |version|
      unless version.reify.nil?
        xoi_qb << version.reify.xoi_qb
      end
    end
    return xoi_qb
  end

在我的HTML中设置为显示以下版本:

And in my HTML set to display the versions like this:

  <th>Previous XOI</th>
  <table>
    <% @quarterback.versions.each do |version| %>
        <tr>
          <td><%= version.reify.xoi_qb %> dated <%= version.created_at %></td>
        </tr>
    <% end %>

不确定如何显示两者之间的差异.

Not sure how to show the difference between the two.

真的很感谢您的帮助.

推荐答案

看看有关PaperTrail的版本差异的文档.特别是，这是您要注意的:

Take a look at the documentation on diffing versions with PaperTrail. In particular, here's what you want to take note of:

如果您在 versions 表中添加 object_changes 文本列，则在安装时使用 rails生成paper_trail:install --with-changes 选项或手动，PaperTrail将在每个更新版本中存储更改差异(不包括PaperTrail忽略的任何属性).

If you add an object_changes text column to your versions table, either at installation time with the rails generate paper_trail:install --with-changes option or manually, PaperTrail will store the changes diff (excluding any attributes PaperTrail is ignoring) in each update version.

启用此行为后，获取 object.versions.map {| v | [v.created_at，v.changeset]} ，然后遍历该结构以呈现您的更改日志.

With this behavior enabled, it is reasonably simple to get object.versions.map{|v| [v.created_at, v.changeset]} and then iterate over that structure to render your change log.

这篇关于Paper_Trail:显示版本之间的差异的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！