Question

我有一个网站，通过就业跟踪用户公司。我需要知道我做错了什么，因为当我创建一个新的用户公司时，用户不知道它。

companies_controller.rb

class CompaniesController < ApplicationController
  # GET /companies
  # GET /companies.json
  def index
    @companies = current_user.companies
    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @companies }
    end
  end

  # GET /companies/1
  # GET /companies/1.json
  def show
    @company = Company.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @company }
    end
  end

  # GET /companies/new
  # GET /companies/new.json
  def new
    @company = Company.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @company }
    end
  end

  # GET /companies/1/edit
  def edit
    @company = Company.find(params[:id])
  end

  # POST /companies
  # POST /companies.json
  def create
    @company = Company.new(params[:company])

    current_user.employments.create!(company_id: @company.id)

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

  # PUT /companies/1
  # PUT /companies/1.json
  def update
    @company = Company.find(params[:id])

    respond_to do |format|
      if @company.update_attributes(params[:company])
        format.html { redirect_to @company, notice: 'Company was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @company.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /companies/1
  # DELETE /companies/1.json
  def destroy
    @company = Company.find(params[:id])
    @company.destroy

    respond_to do |format|
      format.html { redirect_to companies_url }
      format.json { head :no_content }
    end
  end
end

Answer 1

问题在于您的创建操作，特别是行

current_user.employments.create!(company_id: @company.id)

这是在保存公司记录之前执行的，因此它没有id（== nil）。只需在

之后移动该行

if @company.save

它应该通过：through关系将它附加到current_user。

Rails has_many：通过在控制器中创建新的和链接

1 个答案: