undefined local variable or method `comment' for #<#<Class:0xb6d2fd0>:0xc077dd8>
This is what my _comment.html.erb partial looks like
<div class="media">
<%= link_to '#', class: 'pull-left' do %>
<%= image_tag(comment.user.avatar.small.url) if comment.user.avatar? %>
<% end %>
<div class="media-body">
<small>
<%= comment.user.name %> commented <%= time_ago_in_words(comment.created_at) %> ago
<% if policy(comment).destroy? %>
| <%= link_to "Delete", [#topic, #post, comment], method: :delete %>
<% end %>
</small>
</div>
The create section of my comments_controller.rb
def create
#post = Post.find(params[:post_id])
#comment = current_user.comments.build(comment_params)
#comment.post = #post
authorize #comment
if #comment.save
redirect_to #post, notice: "Comment was saved successfully."
else
flash[:error] = "Error creating comment. Please try again."
render :new
end
end
and how I rendered in my posts#show view
<div>
<%= render :partial => "comments/comment", local: {comment: #comment} %>
</div>
You're not passing any locals to this partial:
<%= render :partial => "comments/comment" %>
You'd want to do this:
<%= render :partial => "comments/comment", :locals => { :comment => #comment } %>
Or use the shortcut:
<%= render 'comments/comment', :comment => #comment %>
You're declaring a local variable named comment in your _comment.html.erb partial.
You'll need to pass the #comment from your controller like this:
<%= render :partial => "comments/comment", locals: { comment: #comment } %>
Take a look at Layouts and Rendering Rails Guide for more info.
Related
How can I skip the index page and go straight to the show page if there is exactly only 1 project update in my database for that project(while also making sure no button gets displayed if there is no update(zero) in the database?
I tried this:
<% if #project.updates.any? %>
<%= button_tag type: "button", :class => "radius" do %>
<% if #project.updates=1 %>
<%= link_to 'Project Update', project_update_path(#project), :style => "color: white" %>
<% else %>
<%= link_to 'Project Updates', all_project_updates_path(#project), :style => "color: white" %>
<% end %>
<% end %>
<% end %>
but i get this error:
undefined method `each' for 1:Fixnum
On this line:
<% if #project.updates=1 %>
What is the proper syntax for this?
Below is the relevant code:
My button:
<% if #project.updates.any? %>
<%= button_tag type: "button", :class => "radius" do %>
<%= link_to 'Project Updates', all_project_updates_path(#project), :style => "color: white" %>
<% end %>
<% end %>
These is my custom route:
get 'all_project_updates/:id' => 'project_updates#index', as: 'all_project_updates'
These are the final generated routes:
project_updates_path GET /project_updates(.:format) project_updates#index
project_update_path GET /project_updates/:id(.:format) project_updates#show
This is my projects controller(show action)
def show
#project = Project.find(params[:id])
#comments = Comment.all.where(:project_id => #project.id)
#updates = ProjectUpdate.all.where(:project_id => #project.id)
end
And this is my project updates controller index action:
def index
#projectUpdates = ProjectUpdate.where(:project_id => params[:id])
respond_to do |format|
format.html
end
end
And this is my project updates controller show action:
def show
#projectUpdate = ProjectUpdate.find(params[:id])
respond_to do |format|
format.html
end
end
You probably meant:
<% if #project.updates.count == 1 %>
== is for comparison, = is usually for assignment. Also, you need to compare updatesnumber to1(you can get number withcountmethod), notupdates` themselves.
Instead of comparison, you can use Enumerable#one? method:
<% if #project.updates.one? %>
I'm trying to create a new comment to a video
show.html.erb in videos view
<h5>New Comment</h5>
<%= render 'comments/form' %>
<div class = "show-comments">
<% if #video.comments.size > 0 %>
<h5>Comments</h5>
<% for comment in #video.comments %>
<div class = "well">
<p><%= comment.content %></p>
<small><%= comment.updated_at %></small>
<% if comment.user_id == current_user.id %>
<p align="right"><%= link_to 'delete', comment, method: :delete, data: { confirm: 'Are you sure?' } %></p>
<% end %>
</div>
<% end %>
<% end %>
</div>
_form.html.erb in comments view
<%= form_for [#video, Comment.new], remote: true do |f| %>
<p><%= f.text_area :content, :rows => 3 %></p>
<p><%= f.submit %></p>
<% end %>
create method in comments_controller.rb
def create
#video = Video.find(params[:video_id])
#comment = Comment.new(params[:comment])
current_user.comments << #comment
#video.comments << #comment
respond_to do |format|
if #comment.save
format.html { redirect_to #video, notice: 'Comment was successfully added.' }
format.js
end
end
end
create.js.coffee.erb file
new_comment = $('<p><%= #comment.content %></p>')
$(".show-comments").prepend(new_comment)
When I click the submit comment button, it should call the javascript and post a new comment but it doesn't.
Here is an error message
Failed to load resource: the server responded with a status of 500 (Internal Server Error) http://localhost:3000/videos/51adc1ae25e218d5f6000001/comments
POST http://localhost:3000/videos/51adc1ae25e218d5f6000001/comments 500 (Internal Server Error)
Try renaming your file to create.js.coffee.
It should still render erb although it is not written in the file extension.
Let me know if it helped you
I am passing a collection (#feed_items) to a _feed_item partial via the :collection option and converting it to dailypost with :as => :dailypost.
Inside the _feed_item partial I rendered another partial for _like_button, and i used :locals to continue using dailypost.
Everything works fine with the database. Likes get added and taken out :) BUT
I am trying to use (AJAX) to create.js.erb & destroy.js.erb the like button.
For some reason only the top post gets updated correctly and i have to refresh the page to see the ones below it.
I know the solution involves assigning a unique post id to each "like" element, say "like-123", but that is where i am stuck.......
I also know that the problem may be in _feed_items.html.erb because i am passing two ids....any suggestions??
Views
_feed.html.erb
<% if #feed_items.any? %>
<ol>
<%= render partial: 'shared/feed_item', collection: #feed_items, :as => :dailypost %>
</ol>
<% end %>
_feed_items.html.erb
<li id="<%= #dailypost.id %>">
<span class="user">
<%= link_to dailypost.user.name, dailypost.user %>
<span class="content"><%= dailypost.content_html %></span>
<div id="like">
<%= render :partial => 'likes/like_button', :locals =>{:dailypost => dailypost} %>
</div>
</li>
_like_button.html.erb
<% if like = current_user.likes.find_by_dailypost_id(dailypost.id) %>
<%= form_for like, :html => { :method => :delete }, :remote => true do |f| %>
<%= f.submit "Unlike" %>
<% end %>
<% else %>
<%= form_for current_user.likes.build, :remote => true do |f| %>
<div><%= f.hidden_field :dailypost_id, value: dailypost.id %></div>
<%= f.hidden_field :user_id %>
<%= f.submit "Like" %>
<% end %>
<% end %>
create.js.erb
$("#like").html("<%= escape_javascript(render :partial => 'like_button', :locals => {:dailypost => #dailypost}) %>");
destroy.js.erb
$("#like").html("<%= escape_javascript(render :partial => 'like_button', :locals => {:dailypost => #dailypost}) %>");
Controller
class LikesController < ApplicationController
respond_to :html, :js
def create
#like = Like.create(params[:like])
#dailypost = #like.dailypost
respond_to do |format|
format.js
format.html { redirect_to :back }
end
end
def destroy
like = Like.find(params[:id]).destroy
#dailypost = like.dailypost
respond_to do |format|
format.js
format.html { redirect_to :back }
end
end
end
Hmmm.Replace the first-line in _feed_items.html.erb with this.
<li id="dailypost<%= dailypost.id %>">
and In create.js.erb and destroy.js.erb, make changes
$("#like").html(...)
To
$("#dailypost<%= dailypost.id%> #like").html(...)
This should Work.
I', working on a Ruby On Rails App, and I am getting the following error when I attempt to call the Save method from Active Record to populate a new link to the database. This is code that goes wrong, its in the Create method in my LinksController class:
def create
#link = Link.new(params[:link])
respond_to do |format|
if #product.save
format.html { render :action => "create" }
format.json { render :json => #link }
else
format.html { render :action => "new" }
format.json { render :json => #product.errors, :status => :unprocessable_entity }
end
end
end
When I go to
http://localhost:3000/links/new
And attempt to create a new link with this form:
<%= form_for(#link) do |f| %>
<% if #link.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#link.errors.count, "error") %> prohibited this link from being saved:</h2>
<ul>
<% #link.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :title %><br />
<%= f.text_field :title %>
</div>
<div class="field">
<%= f.label :url %><br />
<%= f.text_field :url %>
</div>
<div class="actions">
<%= f.submit %>
</div>
and click submit, I get the following error:
undefined method `save' for nil:NilClass
I have no idea what is going on, so if anyone has an answer, or even pointers, I would really appreciate it. Thanks.
#link = Link.new(params[:link])
respond_to do |format|
if #product.save
so where did #productcome from?
I'm using Rails 3.2 and I'm making my first Ajax request.
This is my code:
def create
#post = Post.find(params[:post_id])
#comment = Comment.new(params[:comment])
respond_to do |format|
if #comment.save
format.html {
redirect_to #post
}
format.js
else
format.html {
render 'posts/show'
}
format.js
end
end
end
So, I understand that I return a js template.
So, question 1: Is really a good idea to use this approach instead the standard sending json / receiving json in a $.ajax call?
My create.js.erb:
$(".commentlist").append("<%= escape_javascript(render(:partial => #comment)) %>");
Working perfectly.
But... how I validate the form? (Without ajax works perfectly).
I'm seeing that the js.erb is like the html.erb but with js instead of html (I still see this weird, I think that is easier to use controller.coffee, but I will learn this way too :)).
So question 2: How I validate ? I see that what I get in the ajax call is the entire html and my two action vars (#post and #comment).
Just that, I need to learn the Rails approach to do ajax :)
P.S: My _form.html.erb:
<%= form_for comment, :url => post_comments_path(comment.post), :remote => true do |f| %>
<% if comment.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(comment.errors.count, "error") %> prohibited this comment from being added:</h2>
<ul>
<% comment.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<%= f.hidden_field :post_id %>
<p>
<%= f.label :name %>
<%= f.text_field :name %>
</p>
<p>
<%= f.label :email %>
<%= f.text_field :email %>
</p>
<p>
<%= f.label :url %>
<%= f.text_field :url %>
</p>
<p>
<%= f.label :content %>
<%= f.text_area :content %>
</p>
<p class="no-border">
<%= f.submit "Post", :class => "button" %>
</p>
<% end %>