CODEWITHSUNDEEP
ruby-on-railsrubyassociationsruby-on-rails-3
Rohit
Rohit

Reputation: 5721

Cannot manage associations in Ruby on Rails

I have a Post model which is used to store content posted by guest users, and that content is managed by an Admin user. The admin has the rights to block or unblock a particular post.

What I want to do is this:

  1. Display all unblocked Posts to the Guest Users.
  2. Display all Posts to the admin user.

For the first requirement, I have a model BlockedPost which has a polymorphic association with Post model. The post that will be blocked by the admin will be maintained in the BlockedPost model.

For the second requirement I have to give admin the right to block or unblock any particular content. So in my posts/index.html.erb I have done this

<% @posts.each do |post| %>
  <% post.content %>
  <% if post.post_blocked? %>
    <td><%= link_to 'Unblock', blocked_post_path(content.id),:method => :delete%></td>
  <% else %>
    <td><%= link_to 'Block', create_blocked_post_path(content.id) %></td>
  <% end %>
<% end %>

The post_blocked? method above is defined in the Post model:

class Post < ActiveRecord::Base
  def post_blocked?
    !self.blocked_posts.nil?
  end
end

This works but the problem is every time the post_blocked? method is called it makes a database call.

Is there any way to stop this behavior and get the status of all posts in one database call itself?

Upvotes: 0

Views: 103

Answers (1)

codevoice
codevoice

Reputation: 474

hmm... i think you should change your models a little, because they are unconfortable a bit and there isnt any fast way to get your posts from DB, delete BlockedPost model and add a column to Post model (in migration) t.boolean :blocked, :default => true I'd do it like this: 

@blocked_posts = Post.where( :blocked => false)
@unblocked_posts = Post.where( :blocked => true )

or prepare scopes in your Post model and then in your view just display 2 lists

<% @unblocked_posts.each do |upost| %>
  <%= upost.content %>
  <%= link_to 'Block that post', ... %>
<% end %>
<% @blocked_posts.each do |bpost| %>
  <%= bpost.content %>
  <%= link_to 'Unblock', ... %>
<% end %>

Upvotes: 1

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