It would help to know the URL your being redirected to... but I see
one potential issue:
if @comment.save
flash[:success] = "Comment saved."
redirect_to articles_path(@article)
else
render 'show'
end
Lets pretened your comment failed to save... your rendering show...
Show what? By default your going to render the comment#show action
with no ID. You want to be rendering articles/show i assume.
On Sep 4, 1:48 pm, Kelp Kelp <[email protected]> wrote:
> Hello,
> I have added a comment form to my article show page, but after I submit
> the comment, I get the following error: Couldn't find Article without an
> ID.
> I think it is because the Comments controller does not know which
> article to add the new comment.
>
> comments_controller:
> def create
> @article = Article.find(params[:article_id])
> @comment = @article.comments.create(params[:comment])
> if @comment.save
> flash[:success] = "Comment saved."
> redirect_to articles_path(@article)
> else
> render 'show'
> end
> end
>
> article show page:
> <% @article.comments.each do |comment| %>
> <%= comment.title %>
> <%= comment.content %>
> <%= comment.user %>
> <% end %>
>
> <%= form_for([...@article, @article.comments.build]) do |f| %>
> <%= render 'shared/error_messages', :object => f.object %>
> <div class="field">
> <%= f.label :title %><br />
> <%= f.text_field :title %>
> </div>
> <div class="field">
> <%= f.label :content %><br />
> <%= f.text_area :content %>
> </div>
> <div class="actions">
> <%= f.submit "Post Comment" %>
> </div>
> <% end %>
>
> I am trying to follow this
> guide:http://edgeguides.rubyonrails.org/getting_started.html#adding-a-secon...
>
> Thanks.
> --
> Posted viahttp://www.ruby-forum.com/.
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