Question

I have the following three models:

class User < ActiveRecord::Base
  has_many :associations
  has_many :pharmacies, :through => :accociations 
end

class Associations < ActiveRecord::Base
  belongs_to :user
  belongs_to :pharmacy
end

class Pharmacy < ActiveRecord::Base  
  has_many :associations
  has_many :users, :through => :accociations
end

When I open the users#show action I get the following error:

ActiveRecord::HasManyThroughAssociationNotFoundError in Users#show

Showing /Users/fanboy/Sites/ndt_app_v6/app/views/users/show.html.erb where line #14 raised:

Could not find the association :accociations in model User

Extracted source (around line #14):

11:   <div class="span8">
12:     <%= form_for(@user) do |f| %>
13:       <%= f.label :pharmacy_ids, "Pharmacies" %><br />
14:       <%= f.collection_select :pharmacy_ids, Pharmacy.order(:name), :id, :name, {}, {multiple: true} %>
15:     <% end %>
16:   </div>
17: </div>

Basically I would like to allow Users to associate themselves with a Pharmacy. Instead I get the error above, any help would be much appreciated.

Answer 1

Your comment is way off, and the linked documentation has nothing to do with your problem.

The problem with your code is that you have a brutally obvious typo in several places. Your association is called associations, but your :through uses accociations.

Associations vs ACCociations.

Rails is telling you exactly what the error is:

Could not find the association :accociations in model User

The reason your linked documentation fixed your problem is that you probably spelled the new association name correctly. It’s pretty important that you spell things correctly when programming, and such an obvious typo should really leap out at you.