Using "join" on associated objects

rubyonrails-talk
1

I have a model, Download, with a HABTM relationship to another model, Product. In the index view for Download, I want to list all of the associated products by name. Here is my view code for the table row:

<script src="http://gist.github.com/73492.js&quot;&gt;&lt;/script&gt;

I've tried using "download.products.join(', ')", but all I get is the objects has mark (#) in my HTML. Is there a quick and easy way of creating a joined list of all the product names that I just don't know about?

Thanks.

2

Sorry, here's my view code:

<tr class="<%= cycle('off', 'on') %>">   <td><%= link_to(download.title, edit_download_path(download)) %></td>   <td><%= link_to(download.file_name, download_path(download)) %></td>   <td><%= download.part_number %></td>   <td>     <% download.products.each do |product| -%>     <%= product.name %>,     <% end -%>   </td>   <td class="delete"><%= link_to('&times;', download_path (download), :confirm => "Are you sure you want to delete # {download.title}?", :method => 'delete') %></td> </tr>

3

I have a model, Download, with a HABTM relationship to another model, Product. In the index view for Download, I want to list all of the associated products by name. Here is my view code for the table row:

<script src="http://gist.github.com/73492.js&quot;&gt;&lt;/script&gt;

I've tried using "download.products.join(', ')", but all I get is the objects has mark (#) in my HTML. Is there a quick and easy way of creating a joined list of all the product names that I just don't know about?

when you call join on products it calls to_s on each Product, because it doesn't know any better (and the particular details of the default to_s on objects means that what you get is invalid html that is often displayed as just # by browers). It's up to you to turn that array of products into an array of suitable strings (checkout the select/map methods on Array) and then call join on that

Fred

4

<%= @download.products.collect{ |p| p.name }.join( ', ' ) %>