NoMethodError in Articles#show.undefined method `article_comments_path' - ruby-on-rails

Question

**ARTICLE CONTROLLER** //controller
class ArticlesController < ApplicationController
def index
#article=Article.all
end
def show
#article=Article.find(params[:id])
#comment = Comment.new
#comment.article_id = #article.id
end
def new
#article=Article.new
end
def create
#article = Article.new(article_params)
#article.save
redirect_to article_path(#article)
end
def destroy
article=Article.find(params[:id])
article.destroy
redirect_to articles_path
end
def edit
#article = Article.find(params[:id])
end
def update
#article = Article.find(params[:id])
#article.update(article_params)
flash.notice = "Article '#{#article.title}' Updated!"
redirect_to article_path(#article)
end
def article_params
params.require(:article).permit(:title, :body)
end
end
**SHOW.HTML.ERB** /view file
<h1><%=#article.title%></h1>
<p><%=#article.body%></p>
<br><hr>
<%= link_to "edit", edit_article_path(#article) %>|
<%= link_to "delete",article_path(#article), method: :delete,data: {confirm: "Really delete the article?"} %>|
<%= link_to "<< Back to Articles List", articles_path %>
<h3>Comments</h3>
<%= render partial: 'articles/comment', collection: #article.comments %>
<%= render partial: 'comments/form' %>
**_FORM.HTML.ERB** //_form view
<h3>Post a Comment</h3>
<%= form_for [ #article, #comment ] do |f| %>
<p>
<%= f.label :author_name %><br/>
<%= f.text_field :author_name %>
</p>
<p>
<%= f.label :body %><br/>
<%= f.text_area :body %>
</p>
<p>
<%= f.submit 'Submit' %>
</p>
<% end %>
rake routes:
Prefix Verb URI Pattern Controller#Action
articles GET /articles(.:format) articles#index
POST /articles(.:format) articles#create
new_article GET /articles/new(.:format) articles#new
edit_article GET /articles/:id/edit(.:format) articles#edit
article GET /articles/:id(.:format) articles#show
PATCH /articles/:id(.:format) articles#update
PUT /articles/:id(.:format) articles#update
DELETE /articles/:id(.:format) articles#destroy
root GET / articles#index
comments GET /comments(.:format) comments#index
POST /comments(.:format) comments#create
new_comment GET /comments/new(.:format) comments#new
edit_comment GET /comments/:id/edit(.:format) comments#edit
comment GET /comments/:id(.:format) comments#show
PATCH /comments/:id(.:format) comments#update
PUT /comments/:id(.:format) comments#update
DELETE /comments/:id(.:format) comments#destroy
i get no articles_comments_path!
NoMethodError in Articles#show
Showing /home/manoj/ror/blogger/app/views/comments/_form.html.erb where line #3 raised:
undefined method article_comments_path' for #<#<Class:0x00000005be3d40>:0x000000054cacc0>
app/views/comments/_form.html.erb:3:in_app_views_comments__form_html_erb__3077497298558231225_47236640'
app/views/articles/show.html.erb:11:in `_app_views_articles_show_html_erb__4529829459036724249_48053660'

Answer 1

You are getting this error because you don't have article_comments_path helper method. Change your routes to this:
resources :articles do
resources :comments
end
OR
If you don't want to nest routes then change your form to this:
<%= form_for #comment do |f| %>
// form fields
<% end %>
Also in show action you can dry up your code by using association methods
def show
#article= Article.find(params[:id])
#comment = #article.comments.build
end