Nested form not displaying submitted content on show page - ruby-on-rails

Question

I am trying to add a polling feature to the app from Hartl's Rails Tutorial. Started off by following #196 Nested Model Form and Nested forms with Rails 4.2 Strong Parameters. After submitting the form, the content saves properly to the database, however, I am unable to see the results in the show page and cannot figure out why.
Models-
class Micropost < ActiveRecord::Base
has_many :polls, dependent: :destroy
accepts_nested_attributes_for :polls, :reject_if => lambda {|a| a[:content].blank? }
def questions_for_form
collection = polls.where(micropost_id: id)
collection.any? ? collection : polls.build
end
end
class Poll < ActiveRecord::Base
belongs_to :micropost
has_many :answers, dependent: :destroy
accepts_nested_attributes_for :answers, :reject_if => lambda {|a| a[:content].blank? }
def answers_for_form
collection = answers.where(micropost_id: id)
collection.any? ? collection : answers.build
end
end
class Answer < ActiveRecord::Base
belongs_to :poll
end
Controllers-
class StaticPagesController < ApplicationController
def home
if logged_in?
#micropost = current_user.microposts.build
#poll = #micropost.polls.build
3.times {#poll.answers.build}
#feed_items = current_user.feed.paginate(page: params[:page])
end
end
end
class MicropostsController < ApplicationController
def create
#micropost = current_user.microposts.build(micropost_params)
if #micropost.save
flash[:success] = "Micropost created!"
redirect_to root_url
else
#feed_items = []
render 'static_pages/home'
end
end
private
def micropost_params
params.require(:micropost).permit(:content, polls_attributes: [:content, :id, :micropost_id, answers_attributes: [:content, :id, :poll_id]])
end
end
class UsersController < ApplicationController
def show
#user = User.find(params[:id])
#microposts = #user.microposts.paginate(page: params[:page])
end
end
Routes-
Rails.application.routes.draw do
resources :microposts, only: [:create, :destroy]
resources :polls
resources :answers
end
Views-
_micropost_form.html.erb
<%= form_for(#micropost) do |f| %>
<%= render 'shared/error_messages', object: f.object %>
<div class="field">
<%= f.text_area :content, placeholder: "Compose new post..." %>
</div>
<button type="button" class="btn btn-default btn-xs" data-toggle="collapse" data-target="#pollcollapse" id="pollbtn">Poll</button>
<div id="pollcollapse" class="collapse">
<%= f.fields_for :polls do |questions_for_form| %>
<%= render 'shared/poll_fields', :f => questions_for_form %>
<% end %>
</div>
<%= f.submit "Post", class: "btn btn-primary" %>
<% end %>
_poll_fields.html.erb
<div class="field">
<%= f.text_field :content, placeholder: "Poll question..." %>
</div>
<%= f.fields_for :answers do |answers_for_form| %>
<%= render 'shared/answer_fields', :f => answers_for_form %>
<% end %>
_answer_fields.html.erb
<div>
<%= f.text_field :content, placeholder: "Answer" %>
</div>
show.html.erb
<% provide(:title, #user.name) %>
<div class="row">
<aside class="col-md-4">
<section class="user_info">
<h1>
<%= gravatar_for #user %>
<%= #user.name %>
</h1>
</section>
</aside>
<div class="col-md-8">
<% if #user.microposts.any? %>
<h3>Posts (<%= #user.microposts.count %>)</h3>
<ol class="microposts">
<%= render #microposts %>
</ol>
<%= will_paginate #microposts %>
<% end %>
</div>
</div>
_micropost.html.erb
<li id="micropost-<%= micropost.id %>">
<span class="content"><%= micropost.content %></span>
<span>
<% for poll in #micropost.polls %> //Poll & answer content do not appear.
<%= poll.content %>
<% for answer in poll.answers %>
<%= answer.content %>
<% end %>
<% end %>
</span>
</li>
I think this should be all of the relevant information, but please let me know if I am missing anything. Thank you very much for any help at all!

Answer 1

In your _micropost.html.erb partial, you reference #micropost which doesn't appear to be defined anywhere. Try changing that from an instance variable to tbe local variable micropost (learn about the difference between #micropost and micropost here). Also, in Ruby it's recommended by people smarter than me (at least I've read it multiple times) that you should use .each instead of for. The updated code in your partial:
<li id="micropost-<%= micropost.id %>">
<span class="content"><%= micropost.content %></span>
<span>
<% micropost.polls.each do |poll| %>
<%= poll.content %>
<% poll.answers.each do |answer| %>
<%= answer.content %>
<% end %>
<% end %>
</span>
</li>
Also, since you define #microposts in your show action, you can refactor your code in the show view like so:
<div class="col-md-8">
<% if #microposts.any? %>
<h3>Posts (<%= #microposts.count %>)</h3>
<ol class="microposts">
<%= render #microposts %>
</ol>
<%= will_paginate #microposts %>
<% end %>
</div>

Answer 2

Yes instance vs. Local variables issue. I'd say it might be easier to use a gen, but if you are learning rails and you have the time, my opinion is its better to do it yourself the first time. It helps you learn the framework and better able to solve problems when you run into something for which there is no gem. After learning yourself, go with a gem if you find it really serves your purpose... Or make your own gem! Cheers.