Question

当我尝试编辑联系人以添加DataType时，我收到：'未许可的参数：data_format'错误。我试过跟随我在网上发现的类似关联，但无法弄清楚我错过了什么。如果这是多余的，我道歉。

以下是相关信息：

型号：

# == Schema Information
#
# Table name: contacts
#
#  id          :integer          not null, primary key
#  name        :string
#  email       :string
#  phone       :string
#  mobile      :string
#  created_at  :datetime         not null
#  updated_at  :datetime         not null
#  supplier_id :integer
#
class Contact < ActiveRecord::Base
    has_one :data_type
    accepts_nested_attributes_for :data_type, allow_destroy: true
end
# == Schema Information
#
# Table name: data_formats
#
#  id         :integer          not null, primary key
#  name       :string
#  created_at :datetime         not null
#  updated_at :datetime         not null
#  contact_id :integer
#
class DataFormat < ActiveRecord::Base
    belongs_to :contact
end

联络管理员：

class ContactsController < ApplicationController
  before_action :set_contact, only: [:show, :edit, :update, :destroy]

  def new
    @contact = Contact.new
  end

  def create
    @contact = Contact.new(contact_params)

    respond_to do |format|
      if @contact.save
        format.html { redirect_to @contact, notice: 'Contact was successfully created.' }
        format.json { render :show, status: :created, location: @contact }
      else
        format.html { render :new }
        format.json { render json: @contact.errors, status: :unprocessable_entity }
      end
    end
  end

  private

    def set_contact
      @contact = Contact.find(params[:id])
    end

    def contact_params
      params.require(:contact).permit(:name, :email, :phone, :mobile, :data_format,
                                      data_format_attributes: [ :id, :name, :contact_id, :_destroy ] )
    end
end

修改视图

<%= simple_form_for @contact do |f| %>
  <div class="form-group">
    <div class="col-lg-6">
      <%= f.input :name %>
    </div>
    <div class="col-lg-6">
      <%= f.simple_fields_for :data_format do |t| %>
        <%= t.input :id, label: 'Date Format:', :collection => DataFormat.order(:name) %>
      <% end %>
    </div>
    <div class="col-lg-6">
      <%= f.label "Submit", class: 'control-label' %>
      <%= f.button :submit, class: 'btn btn-primary form-control' %>
    </div>
  </div>
<% end %>

DataType（s）出现在表单中，我可以选择它们。所以，我知道问题必须在控制器内。

非常感谢任何帮助！

Answer 1

您的contact.rb正在接受嵌套属性名称和permitted parameters名称不匹配。 contact.rb提及：accepts_nested_attributes_for :data_type, allow_destroy: true .

<强> contact.rb

class Contact < ActiveRecord::Base
    has_one :data_format
    accepts_nested_attributes_for :data_format, allow_destroy: true
end

<强> contacts_controller.rb

class ContactsController < ApplicationController
  before_action :set_contact, only: [:show, :edit, :update, :destroy]

  def new
    @contact = Contact.new
    @contact.data_format = DataFormat.new
  end

  ...

    private

        def set_contact
          @contact = Contact.find(params[:id])
        end

        def contact_params
          params.require(:contact).permit(:name, :email, :phone, :mobile, :data_format,
                                          data_format_attributes: [ :id, :name, :contact_id, :_destroy ] )
        end

<强>形式

<%= simple_form_for @contact do |f| %>
  <div class="form-group">
    <div class="col-lg-6">
      <%= f.input :name %>
    </div>
    <div class="col-lg-6">
      <%= f.simple_fields_for :data_format, @contact.data_format do |t|%>
        <%= t.input :id, label: 'Date Format:', :collection => DataFormat.order(:name) %>
      <% end %>
    </div>
    <div class="col-lg-6">
      <%= f.label "Submit", class: 'control-label' %>
      <%= f.button :submit, class: 'btn btn-primary form-control' %>
    </div>
  </div>
<% end %>

在哪里允许has_one / belongs_to关联中的参数？

1 个答案: