未使用accepts_nested_attributes_for和decent_exposure设置关联id
未使用accepts_nested_attributes_for和decent_exposure设置关联id
提问于 2011-09-24 23:55:40
当我发布一个表单来创建一个带有子评论的新查询时(在应用程序中，查询可以有多个评论)，评论不会被构建。当删除存在验证时，它会起作用。因此，它与构建和保存事物的顺序有关。如何保存验证并保持代码的整洁？
(以下是一个示例，因此它可能不是完全可运行的)
models/quiiry.rb
class Inquiry < ActiveRecord::Base
has_many :comments
accepts_nested_attributes_for :commentsmodels/comment.rb
class Comment < ActiveRecord::Base
belongs_to :inquiry
belongs_to :user
validates_presence_of :user_id, :inquiry_id控制器/inquiry_controllers.rb
expose(:inquiries)
expose(:inquiry)
def new
inquiry.comments.build :user => current_user
end
def create
# inquiry.save => false
# inquiry.valid? => false
# inquiry.errors => {:"comments.inquiry_id"=>["can't be blank"]}
end视图/查询/new.html.haml
= simple_form_for inquiry do |f|
= f.simple_fields_for :comments do |c|
= c.hidden_field :user_id
= c.input :body, :label => 'Comment'
= f.button :submit数据库架构
create_table "inquiries", :force => true do |t|
t.string "state"
t.datetime "created_at"
t.datetime "updated_at"
end
create_table "comments", :force => true do |t|
t.integer "inquiry_id"
t.integer "user_id"
t.text "body"
t.datetime "created_at"
t.datetime "updated_at"
end回答 1
Stack Overflow用户
回答已采纳
发布于 2012-06-20 10:26:43
基本上，在保存之前，您还在测试inquiry_id的存在，这是从注释到查询的返回关联，只有在保存注释之后才能设置。实现这一点并仍然保持验证完好无损的另一种方法是：
comment = Comment.new({:user => current_user, :body => params[:body]
comment.inquiry = inquiry
comment.save!
inquiry.comments << comment
inquiry.save!或者另一种方式是
= simple_form_for inquiry do |f|
= f.simple_fields_for :comments do |c|
= c.hidden_field :user_id
= c.hidden_field :inquiry_id, inquiry.id
= c.input :body, :label => 'Comment'
= f.button :submit基本上就是在评论表单中添加以下行
= c.hidden_field :inquiry_id, inquiry.id页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/7540087
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