Public Activity with Acts As Votable

[Richard Coy]

I'm trying to add Acts As Votable to my Public Activity Model but I get the following error when I try to view the page:

undefined method `get_upvotes' for nil:NilClass

It chokes on this line:

 <span class="badge"><%= @activity.get_upvotes.size %></span>

I'm pretty new to Rails so this is throwing me for a loop. Here is the related code:

View Code

<%= link_to like_activity_path(activity),  class: "like", method: :put do %>
         <button type="button" class="btn btn-info" aria-label="Left Align">
              <span class="glyphicon glyphicon-thumbs-up glyphicon-align-center" aria-hidden="true"></span>
              <span class="badge"><%= activity.get_upvotes.size %></span>
         </button>
 <% end %>

Model Code

class Activity < ActiveRecord::Base
    acts_as_votable
end


Controller Code

class ActivitiesController < ApplicationController

    before_action :authenticate_user!, only: [:index, :upvote]

    def index
        @users = current_user.active_friends
        @users.push(current_user)
        case params[:content] when 'posts'
            @activities = PublicActivity::Activity.where(owner_id: @users, trackable_type: "Post").paginate(page: params[:page], per_page: 6).order('created_at DESC')
        else
            @activities = PublicActivity::Activity.where(owner_id: @users).paginate(page: params[:page], per_page: 6).order('created_at DESC')
        end
    end

    def upvote
    @activity.upvote_from current_user
    redirect_to activities_path
  end

end


Thanks for any help you can offer!

Rich

[Piotrek Okoński]

Your model here:

class Activity < ActiveRecord::Base
    acts_as_votable
end

completely skips PublicActivity. You should inherit from PublicActivity::Activity, not ActiveRecord::Base if you want to extend PA.

Also @activity is nil, because you are not assigning to that variable anywhere.

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[Janusz M]

So if I'd like to extend PublicActivity::Activity with, let's say, an association - has_many :comments - I should create a new model that inherits from PA and add association to that model?

Can I still keep using the same db table (activities) ? And create new activities in the same way as before, calling activities.create on trackable or something along those lines?

```@activity = @trackable.activities.find_or_initialize_by owner: @owner, recipient: @recipient```

[Piotrek Okoński]

Inheriting will not work since P_A will not use your model, it uses its own internally. Use class_eval as described here https://github.com/chaps-io/public_activity/wiki/%5BHow-to%5D-Use-custom-fields-on-Activity#setup

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