You want to make a blog which has users , posts and comments, I see some differences between what you did and what I did it before when I was creating a blog also. I will tell you what I did (by editing the code of the files you posted in your question) then try it if it works with you :)
1- routes.rb make it like this
resources :users
resources :posts do
resources :comments
end
2- user.rb is fine no need to be modified
3- post.rb also is fine
4- comments.rb
belongs_to :post
belongs_to :user
5- posts_controller.rb
def show
@post = Post.find(params[:id])
@comment = Comment.new
end
6- view/posts/show.html.erb ( this view should make you able to see the post and the comments and a box for the new comments, and a link to edit post and a link to the posts index )
<p><strong>Title:</strong><%= @post.title %></p>
<p><strong>Text:</strong><%= @post.text %></p>
<h2>Comments</h2>
<%= render @posts.comments %>
<h2>Add a comment:</h2>
<%= render "comments/form" %>
<%= link_to 'Edit Post', edit_post_path(@post) %> |
<%= link_to 'Back to Posts', posts_path %>
7- comments_controller.rb ( don't forget to add the destroy method again )
class CommentsController < ApplicationController
before_filter :load_post
def create
@comment = @post.comments.build(params[:comment])
@comment.user_id = current_user.id
if @comment.save
redirect_to @post, notice: "Added comment."
else
render :new
end
end
private
def load_post
@post = Post.find(params[:article_id])
end
end
8- views/comments/_form.html.erb (just try to make it first in a simple way)
<%= form_for([@post,@comment]) do |f| %>
<p>
<%= f.label :body %><br />
<%= f.text_area :body %>
</p>
<p>
<%= f.submit %>
</p>
<% end %>
9- views/comments/_comment.html.erb
<p><strong>Commenter:</strong><%= comment.user.email %></p>
<p><strong>Comment:</strong><%= comment.body %></p>
<p><%= link_to 'Destroy Comment', [comment.post, comment],method: :delete,
data: { confirm: 'Are you sure?' } %>
</p>
I hope this work with you as it works with me, try it and let me know how it goes with you, i got my blog work from the before code for revised episode 229.