基于Devise、Ahoy与Merit的Rails应用：追踪链接点击并分配积分

Hey there! Let's break down how to implement link click tracking with Ahoy and reward points via Merit for your Rails closed community app. Here's a step-by-step approach that fits your existing setup:

1. Fix a Small Quotation Mark Issue First #

First, notice your User model has a Chinese quotation mark around Ahoy::Visit—this will cause errors. Update it to use English quotes:

class User < ApplicationRecord
  has_merit
  has_many :visits, class_name: "Ahoy::Visit"
end

2. Add a Tracking Route #

We need a middleman action to log the click before redirecting to the external link. Update your routes to add a member action for resources:

Rails.application.routes.draw do
  resources :visits
  resources :resources do
    member do
      get :track_click # Adds /resources/:id/track_click route
    end
  end
  devise_for :users, controllers: { registrations: 'registrations' }
end

3. Implement the Tracking Action in ResourcesController #

Add a new action to your ResourcesController that handles the click tracking, points allocation, and redirect:

class ResourcesController < ApplicationController
  # Ensure only logged-in users can trigger this (fits your closed community)
  before_action :authenticate_user!, only: [:track_click]
  # Reuse the existing set_resource method for fetching the resource
  before_action :set_resource, only: [:track_click, :show, :edit, :update, :destroy]

  # ... keep your existing controller actions (index, show, etc.) ...

  def track_click
    # 1. Log the click event with Ahoy
    ahoy.track "Resource link clicked", 
               resource_id: @resource.id, 
               link: @resource.link,
               category_id: @resource.category_id

    # 2. Award points via Merit (adjust the number to your preference)
    current_user.add_points(10)

    # 3. Redirect to the actual external link
    redirect_to @resource.link, allow_other_host: true
  end

  private

  # Make sure this method exists (scaffold should have generated it)
  def set_resource
    @resource = Resource.find(params[:id])
  end
end

4. Update the View to Use the Tracking Link #

Replace your direct external link in the view with the new tracking route:

<td><%= link_to "Learn More", track_click_resource_path(resource), class: 'btn btn-dark btn-sm' %></td>

5. Configure Merit Point Rules #

If you haven't already, run rails generate merit:install to create the Merit initializer. Then open config/initializers/merit.rb and add a rule for the click action:

Merit::PointRules.new do
  # Award 10 points each time a user clicks a resource link
  rule "Resource link clicked", to: :user, score: 10
end

# Optional: Add a badge for frequent resource clickers
Merit::Badge.create!(
  id: 1,
  name: "Resource Explorer",
  description: "Clicked on 5+ resource links",
  level: 1,
  condition: { num_points: { greater_than_or_equal_to: 50 } } # 5 clicks × 10 points = 50
)

6. Optional: Prevent Point Farming #

To stop users from spamming clicks to earn points, add a check in the track_click action to limit how often they can earn points for the same resource:

def track_click
  # Check if the user clicked this resource in the last 24 hours
  recent_click = Ahoy::Event.where(
    user_id: current_user.id,
    name: "Resource link clicked",
    properties: { resource_id: @resource.id }
  ).where("created_at > ?", 24.hours.ago).exists?

  unless recent_click
    current_user.add_points(10)
    ahoy.track "Resource link clicked", resource_id: @resource.id, link: @resource.link
  end

  redirect_to @resource.link, allow_other_host: true
end

Now when a logged-in user clicks "Learn More", the app will:

1. Log the click event in Ahoy's ahoy_events table
2. Award points to the user via Merit
3. Redirect them to the external resource link

内容的提问来源于stack exchange，提问作者Joe Bloggos