Calling certain comments from the data base - ruby-on-rails

Question

How can I call comments + user information that is specified to the specific post the comment was created under. For example:
/articles/8
new comment created with user_id = 3
Page will show Username + comment + created_at
This is my current code:
Post Show Page
<%= #post.title %>
<%= render '/comments/form' %>
<% #post.user.comments.reverse.each do |comment| %>
<li>
<%= comment.user.email %>
<%= comment.comment %>
</li>
<% end %>
I grab user information associated with the comment but the problem is, it's listing all the comments. How do I make only comments with article_id of 8 for example appear.
Post Controller
def create
#post = Post.new(post_params)
#post.user = current_user
if #post.save!
flash[:notice] = "Successfully created..."
redirect_to posts_path
else
flash[:danger] = "failed to add a post"
render 'new'
end
end
def show
#comment = Comment.new
#comments = Comment.find(params[:id])
end
Comment Controller
def create
#post = Post.find(params[:post_id])
#comment = #post.comments.build(comment_params)
#comment.user = current_user
if #comment.save
flash[:notice] = "Successfully created..."
redirect_to post_path(#post)
else
flash[:alert] = "failed"
redirect_to root_path
end
end
Routes
resources :sessions, only: [:new, :create, :destroy]
resources :users
resources :posts do
resources :comments
end
Schema of the comments
create_table "comments", force: :cascade do |t|
t.text "comment"
t.integer "user_id"
t.integer "post_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end

Answer 1

I am assuming that your model looks like
class Comments < ApplicationRecord
belongs_to :user
belongs_to :post
end
class User < ApplicationRecord
has_many :posts
has_many :comments
end
class Post < ApplicationRecord
belongs_to :user
has_many :comments
end
We want to get all the comments for a post so we we can do something like this
# Note that I took the user from this line
<% #post.comments.reverse.each do |comment| %>
<li>
<%= comment.user.email %>
<%= comment.comment %>
</li>
<% end %>
I hope that this should work.