Error Found NoMethodError in Posts#show - ruby-on-rails

Question

So I'm working on a social web app using cloud datastore and ruby on rails. I've completed the crud operations for the posting aspect of the app and I'm trying to crud operations for my comment aspect. I'm running into an error when I try to render my comments form in the individual post page. I get an error and I think it has something to do with either one of my controllers or my erb files. I've been looking at for a long time now so hopefully someone can shed some light on it. I tried this solution I found, but it didn't work. link
For reference, I'm basically following the Google Datastore Bookshelf Tutorial App. BookShelf Tutorial App
Here is my posts controller
class PostsController < ApplicationController
PER_PAGE = 10
def index
#post, #cursor = Post.query limit: PER_PAGE, cursor: params[:cursor]
end
def new
#post = Post.new
end
def create
#post = Post.new post_params
if #post.save
flash[:success] = "Posted"
redirect_to posts_path(#post)
else
render :new
end
end
def edit
#post = Post.find(params[:id])
end
def update
#post = Post.find(params[:id])
if #post.update post_params
flash[:success] = "Updated Book"
redirect_to posts_path(#post)
else
render :edit
end
end
def show
#post = Post.find params[:id]
end
def destroy
#post = Post.find(params[:id])
#post.destroy
redirect_to posts_path
end
private
def post_params
params.require(:post).permit(:title, :body)
end
end
Here is my comments controller
class CommentsController < ApplicationController
def create
#post = Post.find(params[:post_id])
#comment = #post.comments.create(comment_params)
redirect_to post_path(#post)
end
def destroy
#post = Post.find(params[:post_id])
#comment = #post.comments.find(params[:id])
#comment.destroy
redirect_to post_path(#post)
end
private
def comment_params
params.require(:comment).permit(:body)
end
end
Comment model
require "google/cloud/datastore"
class Comment
include ActiveModel::Model
attr_accessor :id, :body
# Return a Google::Cloud::Datastore::Dataset for the configured dataset.
# The dataset is used to create, read, update, and delete entity objects.
def self.dataset
#dataset ||= Google::Cloud::Datastore.new(
project: Rails.application.config.
database_configuration[Rails.env]["dataset_id"]
)
end
def to_entity
post.parent = dataset.key "Post"
entity = Google::Cloud::Datastore::Entity.new
entity.key = post
entity["body"] = body
entity
end
# [START from_entity]
def self.from_entity entity
comment = Comment.new
comment.id = entity.key.id
entity.properties.to_hash.each do |name, value|
comment.send "#{name}=", value if comment.respond_to? "#{name}="
end
comment
end
# [END from_entity]
# Save the book to Datastore.
# #return true if valid and saved successfully, otherwise false.
def save
if valid?
entity = to_entity
Book.dataset.save entity
self.id = entity.key.id
true
else
false
end
end
def persisted?
id.present?
end
Post Model
require "google/cloud/datastore"
class Post
include ActiveModel::Model
attr_accessor :id, :title, :body
# Return a Google::Cloud::Datastore::Dataset for the configured dataset.
# The dataset is used to create, read, update, and delete entity objects.
def self.dataset
#dataset ||= Google::Cloud::Datastore.new(
project: Rails.application.config.
database_configuration[Rails.env]["dataset_id"]
)
end
# Query Book entities from Cloud Datastore.
#
# returns an array of Book query results and a cursor
# that can be used to query for additional results.
def self.query options = {}
query = Google::Cloud::Datastore::Query.new
query.kind "Post"
query.limit options[:limit] if options[:limit]
query.cursor options[:cursor] if options[:cursor]
results = dataset.run query
posts = results.map {|entity| Post.from_entity entity }
if options[:limit] && results.size == options[:limit]
next_cursor = results.cursor
end
return posts, next_cursor
end
def to_entity
entity = Google::Cloud::Datastore::Entity.new
entity.key = Google::Cloud::Datastore::Key.new "Post", id
entity["title"] = title
entity["body"] = body
entity
end
# [START from_entity]
def self.from_entity entity
post = Post.new
post.id = entity.key.id
entity.properties.to_hash.each do |name, value|
post.send "#{name}=", value if post.respond_to? "#{name}="
end
post
end
# [END from_entity]
# [START find]
# Lookup Post by ID. Returns Post or nil.
def self.find id
query = Google::Cloud::Datastore::Key.new "Post", id.to_i
entities = dataset.lookup query
from_entity entities.first if entities.any?
end
# [END find]
# [START validations]
# Add Active Model validation support to Book class.
include ActiveModel::Validations
validates :title, presence: true
# [END validations]
# [START update]
# Set attribute values from provided Hash and save to Datastore.
def update attributes
attributes.each do |name, value|
send "#{name}=", value if respond_to? "#{name}="
end
save
end
# [END update]
# [START destroy]
def destroy
Post.dataset.delete Google::Cloud::Datastore::Key.new "Post", id
end
# [END destroy]
# Save the book to Datastore.
# #return true if valid and saved successfully, otherwise false.
def save
if valid?
entity = to_entity
Post.dataset.save entity
self.id = entity.key.id
true
else
false
end
end
def persisted?
id.present?
end
end
My show.html.erb file
<h1><%= #post.title %></h1>
<p><%= #post.body %></p>
<hr>
<%= link_to 'Edit', edit_post_path(#post), :class => 'btn btn-default' %>
<%= link_to 'Delete', post_path(#post),
method: :delete,
data: {confirm: 'Are You Sure?'},
:class => 'btn btn-danger' %>
<%= render 'comments/form'%>
This is the comments html erb file
<h3>Comments</h3>
<%= #post.comment.each do |comment| %>
<div class="well">
</p><%= link_to '[X]', [comment.post, comment],
method: :delete,
data: {confirm: 'Are You Sure?'} %></p>
</div>
<% end %>
This is the error log
ActionView::Template::Error (undefined method `comment' for #<Post:0xbb05498>):
1: <h3>Add Comment</h3>
2: <%= form_for([#post, #post.comment.build]) do |f| %>
3: <div class="form-group">
4: <%= f.label:body %><br>
5: <%= f.text_area(:body, {:class => 'form-control'}) %>
app/views/comments/_form.html.erb:2:in `_app_views_comments__form_html_erb__676677109_98008740'
app/views/posts/show.html.erb:12:in `_app_views_posts_show_html_erb___922952118_98050956'