Liking Posts Discussion

Learned a lot of new things through this post, thank you. Never knew how to properly write a route to a module or the proper architecture for that set up. Very useful stuff. Would have liked to see you use div_for and dom_id methods when it comes to assigning the ids to the p tags and rendering out JS at the end. I feel like both of those are under utilized functions that handle a lot of the hard coded id values, etc...

Great screencast! I'm behind on my rails development because of a really good Ruby course I'm in, but I will try this out soon. Thank you so much for these!

Hey! I really appreciate all these screencasts, happily pro user. For this I'm getting an "undefined method 'likes'" on the user model so i'm a little stuck. Any ideas why?

Cheers! :)

Thank you for these screencasts! They are awesome. I keep getting an error "Routing Error uninitialized constant Posts" when I click the 'like' link. I feel like this is a fairly simple fix? Any help would be much appreciated. Thanks in advance.

Chris, very useful screencast.

I can get it to work well with just rails, but when I implement ajax I get the following error.

"ActionView::Template::Error (undefined method `likes' for nil:NilClass):"

I've customized it a bit by making polymorphic 'likeable' likes.

Thanks for that screencast. I even watched the forum series and the "polymorphic comments". I m wondering what we do if we want to have likes in our forum for threads and posts? Would you use the polymorphic associations?

Chris,

Any idea what query I could put in my user model to find out all posts that have not (yet) been liked by the user?

This is awesome! Just the functionality I need. Was looking at the "Act-as-votable-gem" but that seems to be overkill as I only need upvotes. Just need to figure out how the gem does the counter caching stuff now

https://github.com/ryanto/a...

Hey Chris,

How do I make the before_action :authenticate_user! to work with ajax? If works perfectly, when there is no remote: true and redirects to the login page if a user is not signed in. However, when using ajax, nothing happens other than a "401 unauthorized" in the logs.

Thanks in advance.

Hey Chris,

First of all, thank's for the quality of your video.

Unfortunately I'am stuck in the middle of the video, i'am facing with this error : undefined method `likes' for, it highlights

<% if user_signed_in? && current_user.likes?(@pin) %>

@pin is the name for post in my app.
def likes? is written in the User model, could you explain why ?

Cheers

@excid3:disqus I have a likes partial inside of a parent directory like this: app/views/recipes/likes/_like.html.erb. I am trying to render inside the show action of the recipes controller and I am getting an error: missing partial: app/views/recipes/likes/_like. I'm not sure what is throwing the error.
likes partial below:

<% if @recipe.liked_by?(current_user) %>
<%= link_to "Unlike", recipe_like_path(@recipe), method: :post %>
<% else %>
<%= link_to "Like", recipe_like_path(@recipe), method: :post %>
<% end %>

In my Recipes::LikesController create action:

@like = Like.where(user_id: current_user.id, recipe_id: @recipe.id)
if @like.nil?
@like = @recipe.likes.where(user_id: current_user.id).first_or_create!
@recipe_was_liked = true
else
@like.destroy
@post_was_liked = false
end

Been looking for a way to do this for a while, great episode...now how would I list all the all the posts that a user has liked? For example, I can do something like this:
<ul>
<%= current_user.owns(@book).each do |book| %>
<li><%= book.id.to_s %></li>
<% end %>
</ul>

...but alas this only shows me the own.id whereas I would like it to show me, for example the book.title. Also, this works with the show action, but in my index it doesn't as I have set up a <% @book.each do |title| %>. I can place the code inline, replacing @book with title but then my ajax button change is rendered useless. I'm fairly new to Rails so any ideas would be welcome!

getting an ActionController::RoutingError (uninitialized constant Pins) error in the logs. Can seem to figure it out

Routes are nested like so:

resources :pins do
resource :like, only: [:new,:create, :destroy], module: :pins
end

In Index View- this is pins/likes/like partial

<% if current_user.likes?(pin) %>
<%= link_to "", pin_like_path(pin), method: :delete, class: "fa fa-pinterest-p like", remote: true %>
<% else %>
<%= link_to "", pin_like_path(pin), method: :post, class: "fa fa-pinterest-p ", remote: true %>
<% end %>

Then I have this nested controller with create and destroy actions
class Pins::LikesController < ApplicationController
...
end

My ajax isn't firing. I am getting an ActionView Template error, undefined local variable or method 'pin'

After I refresh the glyphicon changes color signifying it hit the db. In my index I have <%= render partial: 'pins/likes/like', locals: {pin: pin} %> and the guts of the partial is in my comment below. The partial sits in the block:
@pins.each do |pin|
...
end

Any ideas off the top of your head?

I've been playing with joins but can't seem to find the answer: I can displayed a user's liked posts (current.user.liked_posts.each do) but they are sorted by the creation date of the post. How can I sort by the like.created_at date?

where is the github?

can i have the source coe for this?

Interested to see the source code!

@excid3:disqus Thanks for implementing with basic functionality. I have few questions:

1. On index pages to show all posts, it will have N+1 to check if the current_user like each post. Is there any good way to remove that?
2. I know we could eager load with `includes(:likes)` to solve N+1, just imagine if we have many likes for each post, and we just want to show the total count, and the last 3 likers either radom or from last, how do we do eager load them and prevent to load entire likes collection from db?

@excid3:disqus I am not yet a paid member so I couldn't see this screencast yet, I just have one question though. Is this the kind of "LIKE" that the page will not refresh? Because I only knew acts_as_votable now but my problem is if I click the upvote button, the page will refresh.

Hi, Chris. I am using the friendly_id gem to make the profiles url.
On my like controller I have this def set_profile @profile = Profile.friendly.find(params[:id]) end.
Everything work great but when I click like button I get 404 erro message to console.
The link looks like this
Like and the console error is
POST jquery.self-a714331225d...... http://localhost:3000/profiles/vjandrei/like 404 (Not Found) What I miss here?

Thanks Chris, this episode is so helpful!

Hi Chris, I implemented this liking posts and it was working fine until I added Friendly_ids to the urls.
When adding the friendly_ids , the show action in Posts controller was changed from @post = Post.find(params[:id]) to @post = Post.find_by slug: params[:id]. I have tried replacing post.id under the likes_create/destroy to post.slug but it doesn't work.
Can you please advice on how to fix this?

Hi Chris,

I've got this working well without ajax, but as soon as I add 'remote: true' I get a 404 error in the console. The button is pressed, but doesn't update.

Any ideas as to why this is?

Hi Chris I applied this to a project I'm working on and managed to get it working as per the video, so many thanks. It helped me a great deal, still a newbie.
How would you go about creating a separate view to show all the objects you have liked.

I have this working as per the tutorial but wanted to have a link in my navbar to show all the likes by the user, i.e. my likes, has anyone implemented this tutorial in this way.

Hi Chris,
Why did you decide to roll your own liking system rather than using `acts_as_votable`?

Hi @excid3:disqus loving gorails. Would be super helpful for newbies if all the screenshots were in the transcript. Was chasing my tail with a stupid relationship problem, until I went to the source files.

Hi Chris, just subscribed, really nice stuff here. Regarding this tutorial, I have a question about caching: how would you implement this like feature without having to use `current_user` as the cache key (which obviously would defeat the purpose of the cache in the first place) ? Would you recommend using a gem like `render_async` to do this?

Hi Chris, it's been a while since you posted this, but I'm having an issue and can't figure it out. Basically when I click "Like" everything seems to be working fine and the counter goes up and the button changes to "unlike". But when I click "Unlike" nothing happens until I go to another page. Any idea why that might be? Thanks in advance!

Great Video. However I'm stuck and would love some help.
I have listings results incoming from an API. On my index view I want to add the like or heart button however when i add

<%= link_to 'Like', listing_like_index_path(@listing), method: :post %> it's just break and it's because I don't have :listing_id

these are my routes for like
resources :listings, only: [:index, :show] do
resources :like, module: :listings
end

I added resources instead of resource because after the click the button I want them to stay on the index view

Any help will be deeply apreciated

Hi Chris, I've been followed you along for a while, (I just changed the account frequently because I change the workplace as well) and I really appreciate your work. I just wonder that do you share the beginning project of each video. Because I've been feeling kind of hard to follow along your video without the beginning project. Hope you can consider this. Thank you so much. Keep up the good work.

Hi Chris,

When I make the AJAX request to like a post I receive the following error in the console:

Failed to load resource: the server responded with a status of 500 (Internal Server Error)

The logs show the following error:

Rack app error handling request { POST /posts/7/like }

#<ActionController::UnknownHttpMethod: POST, accepted HTTP methods are OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT, PROPFIND, PROPPATCH, MKCOL, COPY, MOVE, LOCK, UNLOCK, VERSION-CONTROL, REPORT, CHECKOUT, CHECKIN, UNCHECKOUT, MKWORKSPACE, UPDATE, LABEL, MERGE, BASELINE-CONTROL, MKACTIVITY, ORDERPATCH, ACL, SEARCH, MKCALENDAR, and PATCH>

Back in the console the error links to the rails-ujs file and shows me the error at the following location:

if (xhr.readyState === XMLHttpRequest.OPENED) {
**  return xhr.send(options.data);
**}

I'm running on Rails 5.2 if that helps.

Hi Chris,

I want to ask you a question, I got stuck at the part of implementing the likes? method in the user controller. Except my method was named saved? as was my table and related files. I kept getting the error unitialized constant Item::Safe, for hours I tried to fix this and my code all seemed fine. I finally just renamed my table and related files to bookmarks instead of saves. After updating all the models, controllers, routes, ect. It worked... Do you have any insight on this? Is it possible to be a naming conflict?

Thanks in advance.

thanks to all that are participating in this forum, one thing though is how do i make the posts likeable every 24 hours. as in liking the post becomes valid after that time of 24 hrs?

Hi newbie question: Will this work in a Rails 6 project? Thanks

Would be great if the screencast could be updated to factor in changes in Rails

It works on Rails 6 after adding this to
config > webpack > environment.js

const { environment } = require('@rails/webpacker')

const webpack = require('webpack')
environment.plugins.prepend('Provide',
  new webpack.ProvidePlugin({
    $: 'jquery/src/jquery',
    jquery: 'jquery/src/jquery',

    jQuery: 'jquery/src/jquery',
    'window.jQuery': 'jquery'
  })
)

module.exports = environment

i think it will be more interesting if it can be done with Stimulus Reflex