ruby-on-rails - Rails - 不允许的嵌套子参数

Question

父母得救了，孩子却没有。如果我添加landslide.sources.create，它会在sources表中创建一个正确的行，landslide_id但所有其他列都是空的。这是文件：

滑坡控制器.rb

  def new
    @landslide = Landslide.new
    @landslide.sources.build
  end

  def create
    landslide = Landslide.new(landslide_params)
    landslide.save
  end

  def landslide_params
      params.require(:landslide).permit(:start_date, :continent, :country, :location, :landslide_type, :lat, :lng, :mapped, :trigger, :spatial_area, :fatalities, :injuries, :notes, source_attributes: [ :url, :text ])
  end

sources_controller.rb

  def new
    source = Source.new
  end

  def create
    source = Source.new(source_params)

    source.save
  end

  def source_params
    params.require(:source).permit(:url, :text)
  end

_form.html.haml

= form_for :landslide, :url => {:controller => 'landslides', :action => 'create'} do |f|

  .form-inputs
    %form#landslideForm
      #Fields
   %fieldset
        %legend Source
        = f.fields_for :sources do |s|
          .form-group.row
            = s.label :url, class: 'col-sm-2 col-form-label'
            .col-sm-10
              = s.text_field :url, class: "form-control"
          .form-group.row
            = s.label :text, class: 'col-sm-2 col-form-label'
            .col-sm-10
              = s.text_field :text, class: "form-control"


      .form-actions
        = f.button :submit, class: "btn btn-lg btn-primary col-sm-offset-5", id: "submitButton"

滑坡.rb 和 source.rb

class Source < ApplicationRecord
  belongs_to :landslide, inverse_of: :sources
end

class Landslide < ApplicationRecord
  has_many :sources, dependent: :destroy, inverse_of: :landslide
  accepts_nested_attributes_for :sources

** 路线.rb **

  resources :landslides do
    resources :sources
  end

Answer 1

根据您的代码，预计将source使用空字段创建。因为在landslide.sources.create这里，您正在创建source没有任何属性值。

要成功保存source，请执行以下步骤。

1. 建立source在控制器的新方法之上 def new @landslide = Landslide.new @landslide.sources.build end

2. 表单上的用户@landslide（在 上声明new） = form_for @landslide和其他内容将保持不变。

3. landslide.sources.create从你的删除，landslide_controller.rb因为source保存后会自动保存landslide。

希望以上更改能解决您的问题。