如何通过 Rails 中的嵌套表单传递 account_id

Question

我正在尝试在 rails 中设置一个嵌套表单，并且表单中的父对象和子对象都需要有一个 "Account ID" 以便它们都限定在当前用户的范围内帐户，但我无法弄清楚如何通过嵌套表单为子对象传递当前用户的帐户 ID。我不断收到嵌套对象的验证错误 "Account id must be present"。

父表单是 "Product"，我正在尝试将 "Options" 嵌套到 Product.new 表单中。

我正在尝试做这样的事情：

@product.options.account_id = current_user.account.id

但是没用。

这是产品型号：

class Product < ApplicationRecord
  belongs_to :account
  has_many :options, dependent: :destroy

  accepts_nested_attributes_for :options, allow_destroy: true

  validates :account_id,  presence: true
  validates :name,        presence: true, length: { maximum: 120 }
end

和选项型号：

class Option < ApplicationRecord
  belongs_to :account
  belongs_to :product

  has_many :option_values, dependent: :destroy

  validates :account_id,  presence: true
  validates :name,        presence: true,
                          length: { maximum: 60 }
end

下面是我如何将 "Options" 嵌套到产品表单中：

<%= form.fields_for :options do |builder| %>
    <fieldset class='form-group'>
      <%= builder.label :name, 'Add option(s)' %>
      <%= builder.text_field :name %>
      <small id="optionHelp" class="form-text text-muted">
        (e.g. "Sizes" or "Color")
      </small>
    </fieldset>
  <% end %>

这是我的 ProductsController：

class ProductsController < ApplicationController
  before_action :set_product, only: [:show, :edit, :update, :destroy]
  before_action :restrict_access

  def index
    @products = Product.where(:account_id => current_user.account.id).all
  end

  def show
  end

  def new
    @product = Product.new
    @product.options.build
  end

  def edit
  end

  def create
    @account = current_user.account
    @product = @account.products.build(product_params)

    respond_to do |format|
      if @product.save
        format.html { redirect_to @product, notice: 'Product was successfully created.' }
      else
        format.html { render :new }
      end
    end
  end

  def update
    respond_to do |format|
      if @product.update(product_params)
        format.html { redirect_to @product, notice: 'Product was successfully updated.' }
      else
        format.html { render :edit }
      end
    end
  end

  def destroy
    @product.destroy
    respond_to do |format|
      format.html { redirect_to products_url, notice: 'Product was successfully destroyed.' }
    end
  end

  private
    def set_product
      if Product.find(params[:id]).account_id == current_user.account.id
        @product = Product.find(params[:id])
      else
        redirect_to dashboard_path
      end
    end

    def restrict_access
      if index
        authorize @products
      else
        authorize @product
      end
    end

    def product_params
      params.require(:product).permit(:account_id, :name,
                                      options_attributes: [:id, :account_id, :name ])
    end
end

正确的做法是什么？

Answer 1

最简单的选择是在两种形式中添加一个隐藏字段：

https://apidock.com/rails/ActionView/Helpers/FormHelper/hidden_field

所以在你的情况下，对于选项形式，类似于：

  <%= form.fields_for :options do |builder| %>
    <fieldset class='form-group'>
      <%= builder.label :name, 'Add option(s)' %>
      <%= builder.hidden_field :account_id, value: current_account.id %>
      <%= builder.text_field :name %>
      <small id="optionHelp" class="form-text text-muted">
        (e.g. "Sizes" or "Color")
      </small>
    </fieldset>
  <% end %>

这将使您能够访问 [:option][:account_id] 参数，该参数将匹配当前用户的参数。

Answer 2

或者，您可以传递 hidden_field 和 nested_form，如下所示：-

<%= form_for @product do |form|%>
  <%= form.fields_for :options do |builder| %>
      <fieldset class='form-group'>
        <%= builder.label :name, 'Add option(s)' %>
        <%= builder.text_field :name %>
        <small id="optionHelp" class="form-text text-muted">
          (e.g. "Sizes" or "Color")
        </small>
        <%=builder.hidden_field :account_id, value: current_user.account.id%>
      </fieldset>
  <% end %>
  <%= form.hidden_field :account_id, value: current_user.account.id%>
<%end%>

除此之外，您可以在控制器上设置 account_id

  def new
    #@product = Product.new
    @product = current_user.account.products.new
    @product.options.build(account_id: current_user.account.id)
  end

如何通过 Rails 中的嵌套表单传递 account_id

How to pass an account_id through a nested form in Rails

ruby

forms

ruby-on-rails

nested-forms