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How to call a method after presentation in rails 3

I have a task that will take about 20 - 30 seconds. I want this task to be performed immediately after the presentation is visualized. I want the output of this task to be stored in a session variable. What is the easiest way to do this rails 3.

To explain what I need exactly. I am showing a list of tweets to users (this is a visualized view) They must go through them. I want the method to be called after rendering this view, which will take the same tweets and clusters (process 20-30 seconds). I have to get the clustering results in the session so that I can display them on the next page.

How should I do it?

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2 answers

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, . "render". :

  def index
    @tweets = Tweet.all

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @tweets }
    end
    # do something with tweets
    puts "#{@tweets}"
  end
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