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Ruby

Jonathan Martínez
Jonathan Martínez
13,375 Points
Posted by Jonathan Martínez
Jonathan Martínez
13,375 Points

2 Questions about Rails associations!

I have 2 tables (movies and shows); movies has :name, :image and :sinopsis, shows has :time. Table 'shows' is actually referencing movies (no problem there)

## MODELS

# movie.rb
class Movie < ActiveRecord::Base
  has_many :shows
end

# show.rb
class Show < ActiveRecord::Base
  belongs_to :movie
end

Questions

1.- Let's say that I want to show a specific movie, and all the movie's shows. Is this the correct way of doing it?

<h1><%= @movie.name %></h1>
<%= image_tag @movie.image %>
<h3><%= @movie.sinopsis %></h3>

<table>
    <thead>
      <tr>
        <th>Showtimes</th>
      </tr>
    </thead>
    <tbody>
      <% @movie.shows.each do |m| %>
        <tr>
            <td><%= m.time.strftime("%I:%M" + " %p") %></td>
        </tr>
      <% end %>
    </tbody>
  </table>

2.- Why do I have to loop through @movie.shows? Why this won't work?

  @movie.shows.time

=begin
    undefined method `time' for <Show::ActiveRecord_Associations_CollectionProxy:0x33919e0>
=end

Many many thanks for taking some of your time to take a look at this!

Tim Knight
Tim Knight
28,888 Points
Tim Knight
Tim Knight
28,888 Points

Jonathan,

You're definitely on the right track with how you're addressing the output in section 1. Instead of using just m as your index for your loop it's more common in Rails to use a word of what the index is. For example:

<% @movie.shows.each do |show| %>
  <tr>
    <td><%= show.time.strftime("%I:%M" + " %p") %></td>
  </tr>
<% end %>

The reason that you can't just call @movie.shows.time is because @movie.shows is an array of records. You'd have to select the record you want to show the times for. For example @movie.shows.first.time will return the array for the times for the first shows record.