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? %>
<div id="formErrors">
<h4><%= @comment.errors.count %> Error while saving form:</h4>
<ul>
<% @comment.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
Problem solved!
Cheers Greg
Am 17.05.2012 um 20:59 schrieb Greg:
> 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:
> ...
> <div class="comment">
> <h2>Comments</h2>
> <br/>
> 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? %>
> <div id="formErrors">
> <h4><%= @post.comments.build.errors.count %> Error while saving
> form:</h4>
> <ul>
> <% @post.comments.build.errors.full_messages.each do |msg| %>
> <li><%= msg %></li>
> <% end %>
> </ul>
> </div>
> <% end %>
> <p>
> <%= f.label :name %><br/>
> <%= f.text_field :name %><br/>
> </p>
> <p>
> <%= f.label :email %><br/>
> <%= f.text_field :email %><br/>
> </p>
>
> <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
>
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