app/views/activities/_index.html.erb
<% @notifications.where(read: false).reverse.each do |notification| %>
<% activity = notification.activity %>
<p>
<%= link_to activity.user.username, "/#{activity.user.username}" %>
<% if activity.objective_type == "Meetup"%>
<%= I18n.t 'activity.has_done_meetup' %>
<%= link_to activity.activity_title, meetup_path(activity.objective_id) %>
<% elsif activity.objective_type == "Assistance"%>
<%= I18n.t 'activity.has_done_comment' %>
<% id = Assistance.find(activity.objective_id).session.meetup_id %>
<%= link_to activity.activity_title.truncate(40), meetup_path(id) %>
<%= I18n.t 'activity.in_the_meetup' %>
<%= link_to Meetup.find(id).title, meetup_path(id) %>
<% else %>
<%= I18n.t 'activity.has_done_proposal' %>
<%= link_to activity.activity_title, proposal_path(activity.objective_id) %>
<% end %>
</p>
<hr/>
<% end %>