之前我使用过嵌套属性和form_for,但我只是遗漏了一些简单的东西。这是我的模特......
class Skill < ActiveRecord::Base
belongs_to :tag
attr_accessible :tag_id, :user_id, :weight
end
class Tag < ActiveRecord::Base
has_many :skills
attr_accessible :name, :skills_attributes
accepts_nested_attributes_for :skills
end
<div class="field">
<%= f.label :name %><br />
<%= f.text_field :name %>
</div>
<%= f.fields_for :skill do |s| %>
<%= s.label :weight %><br />
<%= s.text_field :weight %>
<% end %>
两个模型的parms正在通过,但是我在控制台中收到了一个质量分配错误...
Started POST "/tags" for 127.0.0.1 at 2013-07-26 10:13:51 -0400
Processing by TagsController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"yofQhmgOyNHvnws/Lg+BoS4TqeTwPdyQjQbLXotnEzI=", "tag"=>{"name"=>"test", "skill"=>{"weight"=>"ee"}}, "commit"=>"Create Tag"}
Completed 500 Internal Server Error in 1ms
ActiveModel::MassAssignmentSecurity::Error (Can't mass-assign protected attributes: skill):
app/controllers/tags_controller.rb:43:in `new'
app/controllers/tags_controller.rb:43:in `create'
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答案 0 :(得分:1)
在tag.rb中,使技能属性可访问。
class Tag < ActiveRecord::Base
has_many :skills
attr_accessible :name, :skills_attributes, :skill
accepts_nested_attributes_for :skills
end
答案 1 :(得分:1)
您可以尝试以下方法来处理has_many:
<% @tag.skills.each do |skill| %>
<%= f.fields_for :skills, skill do |s| %>
<%= s.label :weight %><br />
<%= s.text_field :weight %>
<% end %>
<% end %>
在控制器new / edit中:
@tag.skills.build if @tag.skills.empty?
答案 2 :(得分:1)
Jeremy Pinnix上面的回答是正确的,只需要更改您的查看代码:
<%= f.fields_for :skills do |s| %>
<%= s.label :weight %><br />
<%= s.text_field :weight %>
<% end %>
您应该以复数形式引用您的fields_for关联。即技能不是技能。