Partial with nested model/controller render back to current post and show errors

Rails
1

Hi all,
I get stucked with the following scenario. I have a simple application
where I have a post which can have a lot of comments. In the show action
of the post I loaded the partial form to create the comment. This is
also working. My problem is when the validation for the comment fails I
don’t know how to set the render method in the create action of the
comments controller to get back to the current post show view and also
to display the form errors. I can do a redirect back to the current post
but then I will miss all the form data and see also no errors. Hope
someone can give me a hint how to solve this.

Here are my models:

class Post < ActiveRecord::Base
extend FriendlyId
friendly_id :title, use: :slugged

attr_accessible :title, :body

attr_accessible :title, :teaser, :content, :category_id, :picture

#paperclip settings
has_attached_file :picture, :styles => { :medium => “300x225>”, :small
=> “180x115>”, :thumb => “150x150>” }

#association
belongs_to :category
has_many :comments
end

class Comment < ActiveRecord::Base
attr_accessible :content, :email, :name, :website

validates :content, :email, :name, :website, :presence => {:message =>
“Darf nicht leer sein!”}

belongs_to :post
end

My routes are set like this:

resources :posts do
resources :comments
end

Show view post:
…

Comments


show here partial with comments 
    <h2 class="new">New Comment</h2>
  <%=  render "comments/form" %>
</div>

Comments Form Partial:

<%= form_for([@post,@post.comments.build]) do |f| %>
<% if @post.comments.build.errors.any? %>


<%= @post.comments.build.errors.count %> Error while
saving form:



    <% @post.comments.build.errors.full_messages.each do |msg|
    %>
  • <%= msg %>

    • <% end %>


<% end %>


<%= f.label :name %>

<%= f.text_field :name %>



<%= f.label :email %>

<%= f.text_field :email %>

<p>
  <%= f.label :website%><br/>
  <%= f.text_field :website %><br/>
</p>

<p>
  <%= f.label :content %><br/>
  <%= f.text_area :content %><br/>
</p>

<%= f.submit "Save" %>

<% end %>

create action in comments controller

def create
@post = Post.find(params[:post_id])
@comment = @post.comments.build(params[:comment])
respond_to do |format|
if @comment.save
format.html { redirect_to(post_path(@post), :notice => “Comment
successfully created”) }
else
flash[:alert] = “Something went wrong!”
format.html { render ??? }
end

end

end

Thanks for any help with this.

Cheers Greg

2

Well, I should have read more on the rails guides website. I found the
solution so easy and simple.

def create
@post = Post.find(params[:post_id])
@comment = @post.comments.build(params[:comment])
respond_to do |format|
if @comment.save
format.html { redirect_to(post_path(@post), :notice => “Comment
successfully created”) }
else
flash[:alert] = “Something went wrong!”
format.html { render ‘posts/show’ }
end

end

end

And also changed this in my partial:

<% if @comment.errors.any? %>


<%= @comment.errors.count %> Error while saving form:



    <% @comment.errors.full_messages.each do |msg| %>
  • <%= msg %>

    • <% end %>


<% end %>

Problem solved!

Cheers Greg

Am 17.05.2012 um 20:59 schrieb Greg: