Question

I am relatively new to programming and to rails so please be indulgent:)

I am building a website for myself which contains a blog. I have two models that are nested and I do not seem to understand how to use REST to perform certain actions on my articles and comments.

When I create a comment if the comment doesn’t pass validation I want it to render the page again so that the user can correct his mistakes and resubmit the comment. When I try to render, it gives me a missing template error.

Here is the code:

You can also find this code on github –> https://github.com/MariusLucianPop/mariuslp-

routes.rb

Mariuslp::Application.routes.draw do

  get "categories/new"

  root :to => "static_pages#index"

  match "login" => "visitors#login" # not rest
  match "logout" =>"visitors#logout" # not rest
  match "comment" => "articles#show"

  resources :articles do 
  resources :comments
end

  resources :tags, :taggings, :visitors, :categories, :comments


end

articles_controller.rb

def show
  @article = Article.find(params[:id])
  @comment = @article.comments.new
end

comments_controller.rb

def create
    article_id = params[:comment].delete(:article_id)
    @comment = Comment.new(params[:comment])
    @comment.article_id = article_id
    if @comment.save
      redirect_to article_path(@comment.article_id)
    else
      render article_path(@comment.article_id,@comment) ## This one doesn't work
    end
  end

  def new
    @comment = Comment.new
  end

 def destroy 
    Comment.find(params[:id]).destroy
    redirect_to articles_path()
 end

Views-articles:
_comment.html.erb

<div class="comment">
<%= comment.body %><br />
<%= link_to "Delete Comment", article_comment_path(@article), :method => :delete,    :confirm => "Are you sure you want to delete this comment?" %>
</div>

_comment_form.html.erb

<%= form_for @comment do |f|%>

    <%= f.hidden_field :article_id%>

    <%= f.label :body %><br />
    <%= f.text_area :body, :cols => 50, :rows => 6 %><br />

    <%= f.submit%>
<%end%>

show.html.erb

<p><%= link_to "<< Back to Articles", articles_path%></p>

<div class = "article_show">
    <%= label_tag :category_id %>
    <%= @article.category_id%> <br />

    <%= label_tag :title%>: 
    <%= @article.title%> <br />

    <%= label_tag :body%>: 
    <%= @article.body%> <br />

    <%= label_tag :tag_list%>:
    <%= @article.tag_list%><br />
</div>

<br />
<% if session[:username]== "marius"%>
<div class ="admin">
    <%= link_to "Edit", edit_article_path(@article)%>
    <%= link_to "Delete", article_path(@article), :method => :delete, :confirm => "Are you sure you want to delete this article ?"%>
</div>
<%end%>
<br />



<%= render :partial => 'comment', :collection => @article.comments %>

<%= render :partial => 'comment_form'%>

Answer 1

Have you tried to use where you point the problem?

render 'articles/show'

You don’t need to use article_comment_path because that is a full path, not just the place where you store the view templates. In this case, you only need the view. Of couse you must be sure to get all instance variable which you use in this views.

UPDATE:

@article = Articles.find(article_id)
render 'articles/show'