导轨的has_many嵌套属性+回形针宝石
问题描述:
我有这样的模式:导轨的has_many嵌套属性+回形针宝石
class Project < ApplicationRecord
acts_as_taggable
has_many :documents, dependent: :destroy
accepts_nested_attributes_for :documents
end
而这种模式:
class Document < ApplicationRecord
belongs_to :project,inverse_of: :document, dependent: :destroy
has_attached_file :document, styles: {thumbnail: "60x60#"}
validates_attachment :document, content_type: { content_type: "application/pdf" }
end
这是我的projects_controller.rb
文件的方法:
def new
@project = Project.new
@project.documents.build
end
def project_params
params.require(:project).permit(:title, :resume, :documents => [:id,:name,:description,:date,:local,:document],
end
这是我对该项目的索引视图:
<td><%= project.title %></td>
<td><%= project.resume %></td>
<td><%= project.documents.name %></td>
<td><%= project.documents.description %></td>
<td><%= project.documents.date %></td>
<td><%= project.documents.local %></td>
<td><%= project.documents.document_file_name %></td>
<td><%= link_to 'Download', project.documents.document.url(:original, false) %> </td>
当我创建的文档查看文档,创建文档,但是当我要创建的文档在项目视图属性,它给了我这个错误:
undefined method 'description' for ActiveRecord::Associations::CollectionProxy []
我在做什么错?
答
在你projects_controller.rb
文件project_params
方法变更:documents
到:documents_attributes
:
def project_params
params.require(:project).permit(:title, :resume, :documents_attributes => [:id, :name, :description, :date, :local, :document])
end
':文件=> [:ID,:名称,:说明:日期,:本地,:文件]'应该是' :documents_attributes => [:id,:name,:description,:date,:local,:document]' – Thanh