Making a link in Ruby on Rails

Question

I'm really really newbie in Ruby on Rails... I'm trying to make a link to another page in my project, where it's listed the posts that belong to an escuela.

This is what I did:

In posts_controller.rb I wrote:

def postesc
    @posts = Post.where(:escuela_id => params[:id])
    respond_to do |format|
      format.html # postesc.html.erb
      format.json { render json: @posts }
    end
  end

In config/routes.rb I wrote:

match 'postesc' => 'posts#postesc'

In view/escuelas/listaesc.html.erb I wrote the link:

<%= link_to "Escuelas", :controller => "posts", :action => "postesc" %>

And in view/escuelas/postesc.html.erb I want to make a list of the matching posts. But this page appears just blank, with only the layout.

Please, some help?

Sandip Karanjekar · Accepted Answer · 2012-10-26 11:21:32Z

2

First make the association between post and escuela, then you can find it just by

Escuela.find(params[:id]).posts

Change your routes to -

resources :posts do
  get 'postesc', :on => :collection
end

View :

<%= link_to "List posts", postesc_posts_path %>

answered Oct 26, 2012 at 11:21

Sandip Karanjekar

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Aditya Kapoor · Accepted Answer · 2012-10-26 11:17:46Z

0

make a change in routes.rb as

get 'postesc' => 'posts#postesc'

try...<%= link_to "Escuelas", postesc_path %>

OR

 <%= link_to "Escuelas", { :controller => "posts", :action => "postesc" } %>

answered Oct 26, 2012 at 11:17

Aditya Kapoor

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ernd enson · Accepted Answer · 2012-10-26 11:20:17Z

0

you're missing to add an ID for the Escuela to be selected - as you're doing in your Controller#postesc Action (as in words: where: escuela_id => params[:id]).

<%= link_to "Escuela", :controller => "posts", :action => "postesc", :id => 1 %>

but you could use the object-link method using the following syntax (by changing your routes a litte):

# in routes.rb
match 'postesc' => 'posts#postesc', on: :collection, as: 'esc_index'

# in your view
<%- for escuela in @escuelas do %>
  <%= link_to "Escuela", esc_index(escueal) %>
<% end %>

answered Oct 26, 2012 at 11:20

ernd enson

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