undefined method activity feed and acts_as_follower - ruby-on-rails

Question

I have this set up in my ActivitiesController:
class ActivitiesController < ApplicationController
def index
following_ids = current_member.following_members.map(&:id)
#activities = Activity.where("member_id in (?)", following_ids.push(current_member.id)).order("created_at desc")
end
end
This set up in my FollowsController:
def create
#member = Member.find_by_user_name(params[:member_id])
#follow_member = current_member.follow(#member)
if #follow_member
current_member.create_activity(#follow_member, 'followed')
respond_to do |format|
format.html { redirect_to #member }
format.js
end
end
end
And this set up to display the activity of following another member:
<div>
<span class="status_name">
<%= link_to activity.member.user_name, profile_path(activity.member) %>
</span>
<span>
is now following <%= link_to activity.targetable.following_member.user_name, "#" %>
</span>
<span class="meta">
<%= time_ago_in_words(activity.targetable.created_at) %>
</span>
</div>
<div class="act_content">
<%= follow_profile_link activity.targetable.following_member %>
</div>
I was able to get the following action to create a new activity item in the feed just fine but I can't figure out how to call to the member who's being followed. I get this error:
undefined method `following_member' for #<Follow:0x835b150>
app/views/activities/follow/_followed.html.erb:3:in `_app_views_activities_follow__followed_html_erb__269116874_68857716'
app/views/activities/index.html.erb:14:in `block in _app_views_activities_index_html_erb___16061925_44845644'
app/views/activities/index.html.erb:5:in `_app_views_activities_index_html_erb___16061925_44845644'
I can't figure out what I need to do or what specifically to call to make this work. Any ideas?
EDIT - Models
Activity Model
class Activity < ActiveRecord::Base
belongs_to :member
belongs_to :targetable, polymorphic: true
end
Follow Model
class Follow < ActiveRecord::Base
extend ActsAsFollower::FollowerLib
extend ActsAsFollower::FollowScopes
# NOTE: Follows belong to the "followable" interface, and also to followers
belongs_to :followable, :polymorphic => true
belongs_to :follower, :polymorphic => true
def block!
self.update_attribute(:blocked, true)
end
end
Member Model
class Member < ActiveRecord::Base
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
# Setup accessible (or protected) attributes for your model
attr_accessible :email, :email_confirmation, :password, :password_confirmation, :remember_me,
:first_name, :last_name, :user_name, :pursuits, :avatar, :bio, :city, :state, :country, :pursuit_list
has_many :medium
has_many :statuses
has_many :activities
acts_as_follower
acts_as_followable
acts_as_ordered_taggable
acts_as_ordered_taggable_on :pursuits
def create_activity(item, action)
activity = activities.new
activity.targetable = item
activity.action = action
activity.save
activity
end
Edit - Activities Migration
class CreateActivities < ActiveRecord::Migration
def change
create_table :activities do |t|
t.integer :member_id
t.string :action
t.integer :targetable_id
t.string :targetable_type
t.timestamps
end
add_index :activities, :member_id
add_index :activities, [:targetable_id, :targetable_type]
end
end
Activity Index
<% #activities.each do |activity| %>
<div class="status">
<div class="row">
<div class="span1 stream_av">
<%= avatar_profile_link activity.member %>
</div>
<div class="span7">
<%= render partial: "activities/#{activity.targetable_type.underscore}/#{activity.action}",
locals: { activity: activity } %>
</div>
</div>
</div>
<% end %>
New activity for uploading media
<div>
<span class="status_name">
<%= link_to activity.member.user_name, profile_path(activity.member) %></span> <span>uploaded new <%= link_to "Media", profile_media_path(activity.member) %></span> <span class="meta"> <%= time_ago_in_words(activity.targetable.created_at) %>
</span>
</div>
<div class="act_content">
<%= link_to image_tag(activity.targetable.asset.url(:medium), class: ''), medium_path(activity.targetable_id) %>
</div>
New activity for writing a status
<div>
<span class="status_name">
<%= link_to activity.member.user_name, profile_path(activity.member) %></span> <span>wrote a <%= link_to "Post", profile_stream_path(activity.member) %></span> <span class="meta"> <%= time_ago_in_words(activity.targetable.created_at) %>
</span>
</div>
<div class="act_content">
<%= activity.targetable.content %>
</div>

Answer 1

following_member returns an ActiveRecord object. So, you gotta do something like:
activity.targetable.following_member.first.user_name
instead of
activity.targetable.following_member.user_name
If you want to retrieve all the following members, you'll have to iterate through it.
<%activity.targetable.following_member.each do |member| %>
<%=member.user_name%>
<%end%>