public activity - Rails: Public_Activity Gem - uninitialised constant -

i trying make app rails 4.

i have installed public_activity gem.

i followed ryan bates railscast , took controller based approach, , lighter common option (as opposed tracking model).

in activities_controller have:

class activitiescontroller < applicationcontroller   def index       @activities = publicactivity::activity.order("created_at desc")   end end 

in project.rb, have:

include publicactivity::common 

in projects controller, create action, have:

@project.create_activity :create, owner: current_user 

in activity view - index, have:

<% activities.each |activity| %>         <div class="col-md-4">           <div class="indexdisplay">              <span class="indexheading">                <%= link_to activity.owner.name, activity.owner if activity.owner %>             </span>             <span class="indexsubtext">                                <%= render_activity activity %>             </span> 

in public activity (view folder)/project/_create.html.erb, have:

<% if activity.trackable %>   <%= link_to activity.trackable.name, activity.trackable %> <% else %>   has since been removed <% end %> 

when try this, error:

nameerror @ /activities uninitialized constant actionview::compiledtemplates::activities 

i tried replacing opening line of activity#index activities, activity, changed error message to:

nameerror @ /activities uninitialized constant actionview::compiledtemplates::activities 

what error mean? how fix it?

thank you

it seems use class in loop. try use instance variable in controller.

change this

<% activities.each |activity| %> 

into

<% @activities.each |activity| %>