Rails:HasManyThroughAssociationNotFoundError [英] Rails: HasManyThroughAssociationNotFoundError
本文介绍了Rails:HasManyThroughAssociationNotFoundError的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我在使用 has_many through
关联时遇到问题.
I have problems with getting a has_many through
association to work.
我不断收到此异常:
Article.find(1).warehouses.build
ActiveRecord::HasManyThroughAssociationNotFoundError: Could not find the association :entries in model Article
这些是涉及的模型:
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
这是我的架构:
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
推荐答案
您需要添加
has_many :entries
对于您的每个模型,因为 :through 选项只是指定了第二个关联,它应该用于查找另一侧.
To each of your models, since the :through option just specifies a second association which it should use to find the other side.
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