Comments on Post model will not render, no error message displayed - ruby-on-rails

Question

I'm learning and trying to add functionality to a simple app. I'm adding a comments ability to each micropost and creating comments works fine, however the comments will not render. No error message, application runs perfectly fine except the comments partials just isn't included in the final view.
I've looked at similar questions here and tried so many solutions that I'm not even sure where the problem might be, any help would be much appreciated.
I have 3 relevant models: Users, Microposts, Comments.
Microposts belong to Users, has_many comments.
Comments belongs to Microposts and Users.
Comments model includes columns for "comment_content", "micropost_id", "user_id" and "created_at".
Micropost.rb
class Micropost < ActiveRecord::Base
belongs_to :user
has_many :comments, dependent: :destroy
default_scope -> { order(created_at: :desc) }
validates :user_id, presence: true
validates :content, presence: true, length: { maximum: 1000 }
acts_as_votable
Comment.rb
class Comment < ActiveRecord::Base
belongs_to :user
belongs_to :micropost
validates :comment_content, presence: true
validates :user_id, presence: true
validates :micropost_id, presence: true
User.rb
class User < ActiveRecord::Base
has_many :microposts, dependent: :destroy
has_many :comments
User Controller#show
def show
#user = User.find(params[:id])
#microposts = #user.microposts.paginate(page: params[:page])
#micropost = Micropost.find(params[:id])
#comment = Comment.new
#comments = Micropost.find(params[:id]).comments.paginate(page: params[:page])
end
Comments Controller#create
def create
#micropost = Micropost.find(params[:micropost_id])
#comment = Comment.new(comment_params)
#comment.micropost = #micropost
#comment.user = current_user
if #comment.save
flash[:success] = "Comment created!"
redirect_to current_user
else
render 'shared/_comment_form'
end
end
To render in view from _micropost partial
<ul>
<%= render #comment %>
</ul>
Comments partial _comments
<%= link_to gravatar_for(#micropost.user, size: 15), #micropost.user %>
<%= link_to #micropost.user.name, #micropost.user %>
<% #micropost.comments.each do |comment| %>
<%= comment.comment_content %>
<% end %>
The comments form displays just fine. After logging in and creating a comment I check the console and confirm a comment is created, has the correct content, is associated with the User that made the post and the micropost it was commented on.
So the comment is sitting there in the DB, it just won't come out!
SOLUTION
UsersController:
def show
#user = User.find(params[:id])
end
Views
<% #user.microposts.each do |micropost| %>
<%= link_to gravatar_for(#user, size: 15), #user %>
<%= link_to #user.name, #user %>
<% micropost.comments.each do |comment| %>
<%= comment.comment_content %>
<% end %>
<% end %>
That's basically it, I was overloading my UsersController#show and that was throwing the whole thing off. As the advice below states the Userscontroller was doing the heavy lifting, and I shouldn't have been defining so many variables there.
Can't express enough thanks to #thedanotto and #fylooi. They were both correct. All of the troubleshooting they walked me through taught me so much. It's intimidating learning Rails and I've always refrained from asking stupid questions online, but this experience showed me just how awesome some people can be! I've got a lot to learn, reading through the pragmatic programmers series, I'll do my best to give back to the community!

Answer 1

Your has_many and belongs_to relationships appear to be set up correctly. This means you can rely upon rails to do most of the heavy lifting in your controller and views.
User Controller#show becomes...
def show
#user = User.find(params[:id])
end
views/users/show.html.erb becomes...
<% #user.microposts.each do |micropost| %>
<%= link_to gravatar_for(#user, size: 15), #user %>
<%= link_to #user.name, #user %>
<!-- You have access to micropost here as well, you could still do micropost.user, micropost.user.name instead of #user -->
<% micropost.comments.each do |comment| %>
<%= comment.comment_content %>
<% end %>
<% end %>

Answer 2

this can't work
<%= micropost.comment.comment_content %>
you have a has_many relation in your micropost model.
you could solve this to add a has_one relation to your micropost model with an order by created_at
or temporary (really temporary)
<%= micropost.comments.last.comment_content %>
update:
your partial _comments just need to talk to the comment variable.
so change your micropost.comment.comment_content to comment.comment_content
the name of the user should delegate to the usermodel via
delegate :name, to: :user, prefix: true, allow_nil: true
in your comment model. now you can use comment.user_name to display the name of the user
best

Answer 3

A few things:
You're loading both User and Micropost in your UsersController#show based on ID. Doesn't look right to me, unless your User and Micropost database IDs move in lockstep.
#user = User.find(params[:id])
#micropost = Micropost.find(params[:id])
A Micropost should be shown in a MicropostsController, not a UsersController. Eg. /microposts/1 should return the first Micropost resource, while /users/1 returns the first User resource.
I'm going to assume you're trying to render the user's microposts and their related comments from UsersController#show
Based on that, your variable structure can be arranged as per the following:
# users_controller.rb
class UsersController
def show
#user = User.find(params[:id])
#microposts = #user.microposts
# better practice is to have only one # instance variable in the
# controller, but let's go with this for academic purposes
end
end
# views/users/show.html.erb
<%= render #microposts %>
# this can also be written as
# <% #microposts.each do |micropost|
# <%= render partial: 'micropost', locals: { micropost: micropost }
# <% end %>
# views/users/_micropost.html.erb
<%= link_to gravatar_for(micropost.user, size: 15), micropost.user %>
<%= link_to micropost.user.name, micropost.user %>
<ul>
<%= render micropost.comments %>
</ul>
# views/users/_comment.html.erb
<li>
<%= comment.content
</li>