Question

我最近决定测试Nested Form。从安装宝石到修改各自的模型都很顺利......然后当我尝试实际的东西时，我的运气就用光了。

模型

与所有其他友情模式一样，User自我引用为:friend。

class Share < ActiveRecord::Base
    belongs_to :user
    belongs_to :friend, :class_name => "User"
end

这是我的Paperclip模型：

class Upload < ActiveRecord::Base
    belongs_to :user
    has_attached_file :document

    FILE_FORMAT = ["Audio", "Document", "Image", "Video"]
end

这是通过Devise生成的：

class User < ActiveRecord::Base
    attr_accessor :login

    has_attached_file :image, :styles => { :medium => "120x120!" }

    has_many :uploads
    has_many :shares
    has_many :friends, :through => :shares
    has_many :inverse_shares, :class_name => "Share", :foreign_key => "friend_id"
    has_many :inverse_friends, :through => :inverse_shares, :source => :user

    accepts_nested_attributes_for :uploads
end

表单

这是我的非嵌套表单，它可以正常工作：

<%= simple_form_for(upload, defaults: { wrapper_html: { class: 'form-group' }, input_html: { class: 'form-control' } }, html: { multipart: true }) do |f| %>
    <%= f.input :file_name, label: "File Name:", input_html: {size: 19} %>
    <br /><br />
    <%= f.input :file_type, as: :select, collection: Upload::FILE_FORMAT, label: "File Type:" %>
    <br /><br />
    <%= f.input :document, as: :file, label: "File Path:" %>
    <br /><br />
    <%= f.submit "Upload File" %>
<% end %>

这是我想要解决的形式：

<%= simple_nested_form_for @user, url: uploads_path(@user), html: { method: :post } do |f| %>
<%= f.fields_for :uploads do |ff| %>
  <%= ff.input :file_name, label: "File Name:", input_html: {size: 19} %>
  <br /><br />
  <%= ff.input :file_type, as: :select, collection: Upload::FILE_FORMAT, label: "File Type:" %>
  <br />
  <%= ff.input :document, as: :file, label: "File Path:" %>
  <br /><br />
  <%= ff.submit "Upload File" %>
  <br /><br />
<%= ff.link_to_remove "Remove Document" %>
<% end %>
<%= f.link_to_add "Add Document", :uploads %>
<% end %>

遇到的错误

一个。使用@upload（控制器中为@upload = Upload.new）会得到ArgumentError in Uploads#new。

<%= simple_nested_form_for @upload, url: uploads_path(@upload), html: { method: :post } do |f| %>

Invalid association. Make sure that accepts_nested_attributes_for is used for :uploads association.

B中。我试图修复的表单（请参阅表单部分，@user = current_user）似乎表现为编辑请求。 /uploads/new使用所有用户:uploads的相应值加载所有表单，而不是允许填写表单。

℃。通过同一表单提交会出现param not found: upload错误。

ActionController::ParameterMissing in UploadsController#create

问题

如何纠正嵌套表格以使其能够以正常形式运作？

谢谢。

嵌套表单实现问题

0 个答案: