Rails 3 - Creating a comment and then returning the Partial with JUST the new comment

rubyonrails-talk
1

Here's the flow I have...

First, jquery posts the new comment to the server:

    $.post(this.action,$(this).serialize(),null,'script');

Then in the comments controller:

      def create

        @comment = lots of stuff going on here but it works...

        if @comment.save           flash[:notice] = "Successfully created comment."           respond_to do |format|            format.js         end       end

Ok and this is where I'm stuck, then the create.js.erb:

    $(".cmtBox").html("<%=escape_javascript(render :partial =>"comments/comment")%>");

And the partial:

    <div class="cmtBox" id="comment_<%=comment.id%>">     <%=comment.content%>     </div>

Where I'm stuck is calling the partial in create.js.erb... How do I pass what Rails needs to populate the partial? Right now I get the error: "Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id" Thanks!

2

Have you tried passing in locals for the partial?

Not sure how Rails 3 does it, but Rails 2 its

<%=escape_javascript(render :partial =>"comments/comment", :locals => {:comment => @comment))%>

-sunny http://ezror.com

3

@sunny @comment does not exists inside the create action, and he needs to iterate over a collection , @comments

<%=escape_javascript(render :partial =>“comments/comment”, :locals => {:comments =>fill the comments collection…))%>

or

@comment = lots of stuff going on here but it works… @comments = fill the comments collection… if @comment.save flash[:notice] = “Successfully created comment.” respond_to do |format| format.js end end

then

<%=escape_javascript(render :partial =>“comments/comment”, :locals => {:comments => @comments))%>

@comments does not exists inside the response from create.js.erb so you have to build it there or in the controller’s create action before the respond_to block

you can check my example

http://github.com/rbritom/Simple_polymorphic_nested_comments

4

@radhames thanks but in create.js.erb I do not want comments, just the @comment that was just created via a AJAX post with the comment controller's create...

I'm using your comments code example in the link you listed, it's great :slight_smile:

But your example in create.js.erb sends back ALL the comments for a model, I just want to return the comment that was just created. Can you show me how to do that in your example? What should craete.js.eb look like?

Thanks

5

sure, just do it like sunny said, you are only going to display one comment if you user $(“.cmtBox”).html() if want to add one to the top use insertBefore().

6

Thanks. The JQuery is easy the problem is the partial in your sample app displays a list of several comments were I want to send back to the user just the recently submitted comment. Thoughts?

7

if you want to just pull the current comment do it like sunny said

8

Thanks but that didn't work. Can you show me an example of the controller update to get this to work? Thxs

9

What error are you getting?

nobosh wrote:

Thanks but that didn't work. Can you show me an example of the controller update to get this to work? Thxs

-sunny http://ezror.com

10

Got it working by deleting everything and starting from scratch... Not sure what was the problem but using the above helped me get it right from scratch. Thanks everyone!