Rails - May 2012 - Partial with nested model/controller render back to current post and show errors

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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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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> To post to this group, send email to
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