ruby on rails - Need help showing username in comments -

i have no idea i'm doing wrong. have associated comments posts , users.

user.rb

has_many :comments, dependent: :destroy 

post.rb

has_many :comments, dependent: :destroy 

comment.rb

  belongs_to :user   belongs_to :post 

comments controller

  def create     @post = post.find(params[:post_id])     @comment = @post.comments.create(params[:comment].permit(:body))     @comment.user = current_user     if @comment.save       redirect_to post_path(@post)     else       # else     end   end 

posts view

<h2><%= @comment.user.name %></h2> <p><%= comment.body %></p> 

what doing wrong? in controller, have tried @comment.user = current_user.name in posts view, have tried <%= @comment.user.name %> , <%= @comment.user %>

error: can't remember if same error got before, error i'm seeing when try create comment.

activemodel::missingattributeerror in commentscontroller#create  can't write unknown attribute `user_id`  @comment.user = current_user 

so error message looks might not have foreign key user_id on comments table.

you need run

rails g migration addusertocomments user:references