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Ruby

Posted by Dario Hunt
Dario Hunt
2,245 Points

Undefined local variable or method ajax render partial rails

I'm trying to add ajax to my comment form submission and I've run into an error when I'm trying to render a partial and I don't know how to solve it. I have everything set up properly and comments get created fine. But then I try to render the partial for the comments and I get this error:

undefined local variable or method `each' for #<#<Class:0xae4d760>:0xae59a78>

My create.js.erb

$("#comm_form_wrap").html("<%= escape_javascript(render :partial => "statuses/comment_form") %>");
$('#comment_box').val('');
$("#comments_wrap").html("<%= escape_javascript(render :partial => "statuses/comments") %>")

When I try to render statuses/comments is causing the error.

Here's my partial:

<% @comments.each do |comment| %>
    <div class="com_con">
        <%= Rinku.auto_link(comment.content).html_safe %>
    </div>
<% end %>

So then I tried passing the variables like this

$("#comments_wrap").html("<%= escape_javascript(render :partial => "statuses/comments", :locals => {:comment => comment}) %>")

but it gives this error

undefined local variable or method `each' for #<#<Class:0xae4d760>:0xae59a78>

Not sure what I'm missing here, I'm sure it's something small. Can anyone help me?

View

<% if member_signed_in? %>
    <div id="comm_form_wrap">
        <%= render "comment_form" %>
    </div>

    <div id="comments_wrap">
        <%= render "comments" %>
    </div>
<% end %>

*EDIT*

comments_controller.rb

class CommentsController < ApplicationController

before_filter :authenticate_member!
before_filter :load_commentable
before_filter :find_member

def index
   redirect_to root_path
end

def new
    @comment = @commentable.comments.new
end

def create
    @comment = @commentable.comments.new(params[:comment])
    @comment.member = current_member
    respond_to do |format|
        if @comment.save
          format.html { redirect_to :back }
          format.json
          format.js
        else
          format.html { redirect_to :back }
          format.json
          format.js
        end
    end 
end

def destroy
    @comment = Comment.find(params[:id])
    respond_to do |format|
        if @comment.member == current_member || @commentable.member == current_member
          @comment.destroy
          format.html { redirect_to :back }
        else
          format.html { redirect_to :back, alert: 'You can\'t delete this comment.' }
        end
    end 
end

private

def load_commentable
    klass = [Status, Medium, Project, Event, Listing].detect { |c| params["#{c.name.underscore}_id"] }
    @commentable = klass.find(params["#{klass.name.underscore}_id"])
end

def find_member
    @member = Member.find_by_user_name(params[:user_name])
end 

end

statuses_controller

def show
    @status = Status.find(params[:id])
    @commentable = @status
    @comments = @commentable.comments.order('created_at desc').page(params[:page]).per_page(15)
    @comment = Comment.new
    respond_to do |format|
      format.html # show.html.erb
      format.json { redirect_to profile_path(current_member) }
      format.js
    end
end

2 Answers

Dario Hunt
Dario Hunt
2,245 Points

I solved this issue by rendering my comments as collection instead of an each loop, then just rendered that partial in my ajax file. I also needed to define @comments in my comments_controller create action as well so that it didn't render blank.

Robert Ho
PLUS
Robert Ho
Courses Plus Student 11,383 Points
Robert Ho
Robert Ho
Courses Plus Student 11,383 Points

Since the error is

undefined local variable or method `each' for #<#<Class:0xae4d760>:0xae59a78>

and you are calling the each method on your @comments instance variable, there might be something wrong with the variable. Why don't you copy and paste your controller logic (code in the controller) that contains that @comments instance variable or check if the @comments instance variable is being properly queried from the database.

Dario Hunt
Dario Hunt
2,245 Points

Robert Ho Alright I edited my question to include the controller code. The show action in my statuses_controller is where the @comments instance variable is located and what the view belongs to.