我不确定我是在问这个问题是对的还是太累了以致于不明显。

我的代码是:

_form.html.haml

 = f.collection_select :category, Category.where(:user_id => current_user.id), :id, :name


我得到的是

 ActiveRecord::AssociationTypeMismatch in LinksController#create
 Category(#70203963939880) expected, got String(#70203929255820)


日志是

 Started POST "/links" for 127.0.0.1 at 2012-11-12 22:14:05 -0800
 Processing by LinksController#create as HTML
 Parameters: {"utf8"=>"✓", "authenticity_token"=>"z4RYcUW3hGLfKBAwQLMZbye2I1mn16fg6BSBGe7GILU=", "link"=>{"name"=>"SFGate", "url"=>"http://www.sfgate.com/", "category"=>"1"}, "commit"=>"Save"}
 Completed 500 Internal Server Error in 0ms


它似乎将:id作为字符串而不是整数传递。有什么线索吗?

更新:

class Category < ActiveRecord::Base
  belongs_to :user
  has_many :links

  attr_accessible :name, :color, :position

  COLOR_CODES = ["Green", "Blue", "Yellow", "Orange", "Red", "Purple", "Pink"]
end

class Link < ActiveRecord::Base
  belongs_to :user
  belongs_to :category

  attr_accessible :category, :name, :position, :url, :user_id
end


固定:我有

 t.integer :category


代替

 t.integer :category_id


切换了一切,它的工作完美-我想我太累了:)

最佳答案

您应该更改:

f.collection_select :category, Category.where(:user_id => current_user.id), :id, :name


至:

f.collection_select :category_id, Category.where(:user_id => current_user.id), :id, :name

10-05 22:33
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