Question

我有模特

class Riskfactor < ActiveRecord::Base
  has_many :bodies_riskfactors
  has_many :bodies, through: :bodies_riskfactors    
end

class Body < ActiveRecord::Base
  has_many :bodies_riskfactors
  has_many :riskfactors, through: :bodies_riskfactors   
end

class DisordersArticle < ActiveRecord::Base
  belongs_to :disorder
  belongs_to :article   
end

在视图中

= form_for [:admin, @riskfactor], html: {role: "form"} do |f|
  = f.select :body_ids, Body.all.collect {|x| [x.name, x.id]}, {}, :multiple => true

我在更新时遇到错误

可能出现什么问题？

Processing by Admin::RiskfactorsController#update as HTML

参数：{“utf8”=＆gt;“✓”，“authenticity_token”=＆gt;“CVkdBHLzLAeQ8FRFBVyonUuyn1FZAYG + X9fX / mmj + Bo =”，“riskfactor”=＆gt; {“body_ids”=＆gt; [“”， “1”]，“位置”=＆gt;“1”，“slug”=＆gt;“risk-factor-2”，“name_ru”=＆gt;“高血压”，“published_ru”=＆gt;“否” ，“content_ru”=＆gt;“”，“meta_description_ru”=＆gt;“”，“meta_keywords_ru”=＆gt;“”，“name_en”=＆gt;“高血压”，“published_en”=＆gt;“否”， “content_en”=＆gt;“

高血压高血压高血压高血压高血压

”，“meta_description_en”=＆gt;“”，“meta_keywords_en “=＆gt;”“}，”按钮“=＆gt;”“，”id“=＆gt;”4“} 用户负载（0.3ms）SELECT users。* FROM users WHERE users。id = 1 ORDER BY users。id ASC LIMIT 1 Riskfactor加载（0.3ms）SELECT riskfactors。* FROM riskfactors WHERE riskfactors。id = 4 LIMIT 1 （0.1ms）BEGIN Body Load（0.3ms）SELECT bodies。* FROM bodies WHERE bodies。id = 1 ORDER BY position LIMIT 1 身体负荷（2.6ms）选择bodies。* FROM bodies内部加入bodies_riskfactors ON bodies。id = bodies_riskfactors。{{1} } WHERE body_id。bodies_riskfactors = 4 ORDER BY位置 Riskfactor ::翻译负载（0.3ms）SELECT riskfactor_id。* FROM riskfactor_translations WHERE riskfactor_translations。riskfactor_translations = 4 Riskfactor存在（0.6ms）SELECT 1 AS一个来自riskfactor_id WHERE（riskfactors。riskfactors ='risk-factor-2'和slug。riskfactors！ = 4）限制1 （0.2ms）ROLLBACK 在15毫秒内完成500内部服务器错误

NoMethodError（更新中未定义的方法id阻止' app / controllers / admin / riskfactors_controller.rb：44：在`update'

RiskfactorsController

body' for #<Riskfactor:0x007f9a0351c350>):
  app/controllers/admin/riskfactors_controller.rb:45:in

Answer 1

Imho问题是您的视图中有body_ids，但您将关联命名为bodies。尝试将body_ids重命名为bodies_ids或类似名称。

rails has_many通过undefined方法`body'for

1 个答案: