CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-5
Charles Smith
Charles Smith

Reputation: 3289

Display Object Name from has_and_belongs_to_many join table in Rails 5.1

I have a Product model and a Tag model in a has_and_belongs_to_many relationship with a join_table. My Tag has one string column called name.

Everything works, but on my Product index view, I'd like to list all the Tags associated with the Product. Since its in a join_table, I am not sure how to create the bridge to get the Tag name; all I seem to be able to do is list all the tag_ids.

products/index.html.erb

<% @products.each do |product| %>
  <tr>
    <td><%= product.name %></td>
    <td><%= product.tag_ids %></td>
    ...
  </tr>
<% end %>

tag.rb

class Tag < ApplicationRecord
  has_and_belongs_to_many :products
  ...
end

product.rb

class Product < ApplicationRecord
  ...
  has_and_belongs_to_many :tags
  ...
end

Upvotes: 0

Views: 56

Answers (1)

Mikhail Katrin
Mikhail Katrin

Reputation: 2384

Tags should be accessible throug product.

You could simply call tags on your product instance if I got issue correctly.

<% product.tags.map do |tag| %>
    ...
    <%= tag.name %>
    ...
<% end %>

Upvotes: 4

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