在 Rails 4 个 App 中按 ID 查找对象

Question

我使用 Wicked. I've specifically followed this guide 在我的 rails 4 应用程序中构建了一个向导，唯一的区别是我使用嵌套资源执行此操作。我在执行控制器操作时遇到困难，这些操作应该使用其 ID 找到表单正在构建的对象。

应用程序的当前流程是用户单击创建对象的按钮，然后被重定向到向导的第一步，该向导通过一系列步骤更新对象。问题是我没有通过参数传递对象的 ID，因为我在 ID 字段中传递了向导的步骤。

创建对象的按钮

<%= link_to business_loan_application_path(@user), method: :post, :class => "btn btn-success" do %><% end
%>

LoanApplication Controller

    def create
      @user = current_user
      @loanapplication = @user.loan_applications.new
      @loanapplication.save(validate: false)
      redirect_to business_loan_application_wizard_path(@user.id,LoanApplication.form_steps.first)
    end

我需要以某种方式将 :loan_application_id 传递给 business_loan_application_wizard_path 参数。

错误

Couldn't find LoanApplication without an ID

LoanApplication belongs_to 通过 has_many 关系的业务。

{"business_id"=>"55", "id"=>"business_details"}

business_details 是向导中的第一步。这些是我第一次通过带有放置请求的按钮创建对象时传递的参数。

向导控制器

class WizardController < ApplicationController
  include Wicked::Wizard
  before_filter :authenticate_user!
  before_filter :require_business

  steps *LoanApplication.form_steps

  def show
    @business = current_user
    @loanapplication = LoanApplication.find(params[:loan_application_id])
    render_wizard
  end

  def update
    @business = current_user
    @loanapplication = @business.loan_applications.last
    @loanapplication.update_attributes(loan_application_params(step))
    render_wizard @loanapplication
  end
end

Answer 1

this question中的讨论帮助解决了这个问题。

已更改

resources :wizard

到

scope "loan_application/:loan_application_id" do
  resources :wizard
end

在我的 routes.rb 文件中。

我的向导控制器现在如下：

def show
  @business = current_user
  @loanapplication = LoanApplication.find(params[:loan_application_id])
  render_wizard
end

def update
  @business = current_user
  @loanapplication = LoanApplication.find(params[:loan_application_id])
  @loanapplication.update_attributes(loan_application_params(step))
  render_wizard @loanapplication
end

最后，贷款申请控制器重定向 link 已更改：

def create
  @user = current_user
  @loanapplication = @user.loan_applications.new
  @loanapplication.save(validate: false)
  redirect_to business_loan_application_wizard_path(@user.id, LoanApplication.form_steps.first, :loan_application_id => @loanapplication.id) 
end

在 Rails 4 个 App 中按 ID 查找对象

Find object by ID in Rails 4 App

ruby-on-rails

wicked-gem