Find_by_id in Ruby on Rails

Question

I have products that can be a part of an assembly. I only had one assembly, which I called a bundle.

Originally, given that a product had any parts, I included an additional option

If I use

<% if @product.parts.any?(&:in_stock?) %>
 HERE I SHOW OPTION FORM
<% end %>

This works, and displays my option. However now I have another option I'd like to show.

I need to show options to corresponding IDs. It seems that my original product part has an ID of 'bundle', so I tried:

<% if @product.parts.find_by_id('bundle') %>

However my option doesn't load. Any ideas what I could be doing wrong? I don't get an error, it's just not finding that id.

Rails 4 & Spree 2.1+

is 'bundle' int? try find_by_id(params[:part_id]) – Sam Dec 17 '13 at 17:33 — Sam, Dec 17 '13 at 17:33
What does your schema look like? – Justin Wood Dec 17 '13 at 17:33 — Justin Wood, Dec 17 '13 at 17:33

score 2 · Answer 1 · answered Dec 17 '13 at 17:34

Unless you're using a gem like friendly_id, I don't think the id of your parts are going to be 'bundle'. Usually they're an autoincremented integer. Are you 100% sure that that's the id? I would suggest looking at rails built in find methods here. It looks like you might want find_by_name.

score 0 · Answer 2 · answered Dec 17 '13 at 20:16

My schema revealed that what I was looking for was an integer:

    t.integer "part_id"

That particular product part was loading DB:

Spree::AssembliesPart Load  SELECT "spree_assemblies_parts".* FROM "spree_assemblies_parts" WHERE "spree_assemblies_parts"."assembly_id" = 4 AND "spree_assemblies_parts"."part_id" = 6 LIMIT 1

I then used the part_id that was loaded, which in my case was 6.

This find_by method then worked:

    <% if @product.parts.find_by_id('6') %>

Find_by_id in Ruby on Rails

2 Answers2