I have problems with getting a has_many through
association to work.
I keep getting this exception:
Article.find(1).warehouses.build
ActiveRecord::HasManyThroughAssociationNotFoundError: Could not find the association :entries in model Article
These are the models involved:
class Article < ActiveRecord::Base
has_many :warehouses, :through => :entries
end
class Warehouse < ActiveRecord::Base
has_many :articles, :through => :entries
end
class Entry < ActiveRecord::Base
belongs_to :article
belongs_to :warehouse
end
And this is my schema:
create_table "articles", :force => true do |t|
t.string "article_nr"
t.string "name"
t.integer "amount"
t.string "warehouse_nr"
t.datetime "created_at"
t.datetime "updated_at"
t.integer "unit"
end
create_table "entries", :force => true do |t|
t.integer "warehouse_id"
t.integer "article_id"
t.integer "amount"
end
create_table "warehouses", :force => true do |t|
t.string "warehouse_nr"
t.string "name"
t.integer "utilization"
t.datetime "created_at"
t.datetime "updated_at"
end
You need to add
has_many :entries
To each of your models, since the :through option just specifies a second association which it should use to find the other side.