Rails：Chartkick累积用户图 [英] Rails: Chartkick cummulative user graph

问题描述

我在活动的管理控制台中使用chartkick，并试图跟踪一段时间内的累积用户群。

I'm using chartkick in an active admin dashboard and trying to track a cumulative user base over time.

使用groupdate按周进行计数，我可以成功创建一个显示时间点计数的图表，但很难显示累积结果。

Using groupdate to count by week I can successfully create a chart displaying point in time counts but struggling to display cumulative results.

关于未找到类似问题的最佳方法的任何建议？

Any suggestion on best way to approach as I have not found a similar question?

图表局部

            <%= javascript_include_tag "https://www.gstatic.com/charts/loader.js" %>
            <%= line_chart User.group_by_week(:created_at).count %>

dashboard.rb

            column do
              panel "Recent User Additions" do
                table_for User.order("id desc").limit(10).each do |_user|
                  column(:email)    { |user| link_to(user.email, admin_user_path(user)) }
                  column(:state_waters)    { |user| link_to(user.state_waters, admin_user_path(user)) }
                  column(:state_waters)    { |user| link_to(user.home_port, admin_user_path(user)) }
                end
              end

推荐答案

如果我理解您的问题，则需要操纵数据的哈希。

If I understand your question, you need to manipulate the hash of data.

在控制器中执行以下操作：

In controller do somehing like this:

@data = User.group_by_week(:created_at).count
accumulator = 0
@data.transform_values! do |val|
  val += accumulator
  accumulator = val
end

然后将视图显示为<％= line_chart @data％>

如果检查哈希<％= User.group_by_week（：created_at）.count.inspect％> 它变得清楚。

If you inspect the hash <%= User.group_by_week(:created_at).count.inspect %> it becomes clear.

在为了在任何哈希上使用累加器，将自定义方法添加到类哈希中可能很有用。

In order to use accumulator over any hash, could be useful to add a custom method to Class hash.

module HashPatch
  def accumulate_values!
    accumulator = 0
    transform_values! do |val|
      val+= accumulator
      accumulator = val
    end
  end
end
Hash.include HashPatch

points = {'x1' => 0, 'x2' => 10, 'x3' => 10, 'x4' => 10.1}
points.accumulate_values! #=> {"x1"=>0, "x2"=>10, "x3"=>20, "x4"=>30.1}

transform_values！自Ruby v4.2.1起

transform_values! since Ruby v4.2.1

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