CODEWITHSUNDEEP
ruby-on-railsruby
ficalino
ficalino

Reputation: 35

How to display posts from a certain community?

While learning Ruby on rails, I'm trying to find a way to display posts inside communities, but I only managed to display the first post created inside the community

This is what I have so far

communities_controller.rb:

def show 
    if params[:id]
        @posts = Post.where("id = ?", params[:id])
     else
        @posts = Post.all
     end 
end

show.html.erb:

<% @posts.each do |post| %>

    <%= link_to  post.title, community_post_path(@community, post) %>
    <%= truncate post.body, length: 200 %>

<% end %>

routes.rb:

resources :communities do
    resources :posts
end

EDIT: Upon closer inspection I found that it will also display a post in community in which it doesn't belong if that community has no posts of it's own

Upvotes: 0

Views: 59

Answers (3)

fidato
fidato

Reputation: 719

Please remove this line from your code, so your Post model will look like following -

class Post < ApplicationRecord
  belongs_to :account
  belongs_to :community

  validates_presence_of :title, :body, :account_id, :community_id
end

Add above removed line in this file, so Community model will look like follow -

class Community < ApplicationRecord
  belongs_to :account
  validates_presence_of :url, :name, :rules 

  has_many :posts
end

Now use following code for show method -

def show
  @posts = @community.posts
end

It'll solve the issue. Please let me know if you get any errors. Happy to help!

Upvotes: 1

hashrocket
hashrocket

Reputation: 2222

Since you are in the communities_controller, you should look for a community:

communities_controller.rb

def show
  @community = Community.find(params[:id]
end

Once you have that, you can iterate through your @community.posts in the show view:

communities/show.html.erb

<% @community.posts.each do |post| %>
  <%= link_to  post.title, community_post_path(@community, post) %>
  <%= truncate post.body, length: 200 %>
<% end %>

You can also find the posts in the communities_controller and then use those posts in the view:

communities_controller

def show
  @community = Community.find(params[:id]
  @posts     = @community.posts
end

communities/show.html.erb

<% @posts.each do |post| %>
  <%= link_to  post.title, community_post_path(@community, post) %>
  <%= truncate post.body, length: 200 %>
<% end %>

Also, if your community has no posts, you'll probably get an error page in your browser. You can use something like this to save you from that error:

<% if @community.posts.any? %>
  <% @community.posts.each do |post| %>
    <%= link_to  post.title, community_post_path(@community, post) %>
    <%= truncate post.body, length: 200 %>
  <% end %>
<% else %>
  <p>There are no posts for this community.</p>
<% end %>

You should also make sure you have community_id in your posts table and you have your associations setup properly:

community.rb

has_many :posts

post.rb

belongs_to :community

Upvotes: 0

Mehmet Adil İstikbal
Mehmet Adil İstikbal

Reputation: 600

When you click a specific community link, the params[:id] contains the id of that community. So you should use that id parameter for Community model not the Post. After finding that community record from DB you can get the posts like this:

def show
  @community = Community.find(params[:id])
  @posts = @community.posts
end

Upvotes: 1

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