ruby-on-rails - Rails 5 inverse_of 连接表不想使用深度嵌套的 Cocoon 字段

问题描述

我正在使用Ruby 2.6.5和Rails 5.2.3。我有一个带有双嵌套对象的表单Cocoon。表格用于Preorders. 一个Preorder可以有很多Dancers。Dancers可以有很多，也可以属于很多Groups，所以我建立了一个名为DancerGroup.

我使用Cocoon添加dancers_attributes到Preorder表单中，然后再次添加dancer_groups_attributes到dancers_attributes字段内部。

我的问题是，当我尝试Preorder使用新的Dancer和新DancerGroup的关联保存 a 时，我收到以下错误：

舞者舞者组舞者不能为空

这显然意味着它试图在记录有dancer_group之前保存对象。显而易见的答案是，由于我使用的是 Rails 5，默认情况下需要关联，解决方法是正确使用和方法让 Rails 管理保存所有内容一次全部。但是当涉及到我的join table时，它不起作用。当我在模型中设置时，我什至得到了同样的错误。danceridbelongs_toinverse_ofaccepts_nested_attributes_foroptional: truebelongs_to :dancerDancerGroup

我的强大参数如下所示：

private
  def preorder_params
    params.require(:preorder).permit( :event_id,
                                      :dancers_attributes => [
                                        :_destroy,
                                        :id,
                                        :name,
                                        :dancer_groups_attributes => [
                                          :_destroy,
                                          :group_id,
                                          :id ]
                                        ] 
                                      )
  end

我的模型如下所示：

应用程序/模型/preorder.rb

class Preorder < ApplicationRecord
  belongs_to :event
  has_many :dancers, dependent: :destroy, inverse_of: :preorder 
  has_many :dancer_groups, through: :dancers, dependent: :destroy

  with_options reject_if: :all_blank, allow_destroy: true do
    accepts_nested_attributes_for :dancers
    accepts_nested_attributes_for :dancer_groups
  end

  validates :dancers, :length => { minimum: 1 }
  ...
end

应用程序/模型/dancer.rb

class Dancer < ApplicationRecord
  belongs_to :preorder, counter_cache: true, inverse_of: :dancers
  has_many :dancer_groups, inverse_of: :dancer, dependent: :destroy
  has_many :groups, through: dancer_groups

  with_options reject_if: :all_blank, allow_destroy: true do
    accepts_nested_attributes_for :dancer_groups
  end
  ...
end

应用程序/模型/dancer_group.rb

class DancerGroup < ApplicationRecord
  belongs_to :dancer, inverse_of :dancer_groups
  belongs_to :group, inverse_of :dancer_groups
  ...
end

这是我的表单文件的样子

意见/管理/预购/_form.html.haml

...
%fieldset
  %legend Dancers
  #dancers
    - @preorder.dancers.each do |dancer|
      = f.fields_for :dancers, dancer do |ff|
        = render "dancer_fields", f: ff, preorder: @preorder
    = link_to_add_association f, :dancers,
        { "data-association-insertion-node": "#dancers",
          "data-association-insertion-method": "append",
        render_options: { locals: { preorder: @preorder } },
        class: "btn btn-info btn-sm btn-simple float-right" } do 
      = icon "fas", "plus"
      Add Dancer
...

意见/管理/预购/_dancer_fields.html.haml

...
.card.preorder_dancer
  .card-header.row
    .col
      %h4.card-title Dancer Info
    .col-auto
      = link_to_remove_association f, { wrapper_class: "preorder_dancer",
          class: "btn btn-sm btn-icon btn-simple btn-danger" } do 
        = icon "fas", "times"
  .card-body
    .row.pb-3
      .col 
        = f.label :name do 
          Full Name
          %span.text-danger *
        = f.text-field :name, class: "form-control"
    %h4.card-title Dance Groups
    .row{ :id => "dancer_groups_#{f.object.id}" }
      - f.object.dancer_groups.each do |dancer_group|
        = f.fields_for :dancer_groups, dancer_group do |ff|
          = render "dancer_group_fields, f: ff, 
                                  preorder: preorder
    =link_to_add_association f, :dancer_groups,
      { "data-association-insertion-node": "#dancer_groups_#{f.object.id}",
        "data-association-insertion-method": "append",
        render_options:  {locals: { preorder: preorder } },
        class: "btn btn-info btn-sm btn-simple float-right" } do
      =icon "fas", "plus"
      Add Dance Group

意见/管理/预购/_dancer_group_fields.html.haml

.col-lg-6.preorder_dancer_group
  .card.bg-dark
    .card-header.row
      .col
        %h4.card-title Dance Group
      .col.text-right
        =link_to_remove_association f, { wrapper_class: "preorder_dancer_group",
                                    class: "btn btn-sm btn-icon btn-simple btn-danger"} do
          =icon "fas", "times"
    .card-body
      .row
        .col
          =f.label :group_id do
            Group
            %span.text-danger *
          =f.collection_select :group_id,
                               preorder.event.groups,
                               :id,
                               :name,
                               {include_blank: "Select Group"},
                               {class: "form-control"}

标签： ruby-on-railsrubyjoincocoon-gem

%h4.card-title Dance Groups .row{ :id => "dancer_groups_#{f.object.id}" } - f.object.dancer_groups.each do |dancer_group| = f.fields_for :dancer_groups, dancer_group do |ff| = render "dancer_group_fields, f: ff, preorder: preorder

%h4.card-title Dance Groups .row{ :id => "dancer_groups_#{f.object.id}" } = f.fields_for :dancer_groups do |ff| = render "dancer_group_fields, f: ff, preorder: preorder

ruby-on-rails - Rails 5 inverse_of 连接表不想使用深度嵌套的 Cocoon 字段

问题描述

解决方案

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