Rail仅显示其父模型属于当前用户的模型

Question

我正在创建一个Rails 5应用程序并遇到一个问题，我的Projects模型索引显示了平台上所有用户的项目。

我的应用程序的结构方式是我有一个项目模型属于属于用户的Vehicle模型。当我转到我的项目索引时，其他用户的所有项目也会显示。我如何仅获得其父车型具有当前用户的用户ID的项目？或者也可以更好地向Project Class添加用户ID。

这是我的项目控制器：

class ProjectsController < ApplicationController
  before_action :set_project, only: [:show, :edit, :update, :destroy]
  before_action :authenticate_user!

  # GET /projects
  # GET /projects.json
  def index
    @projects = Project.where(completed: 'false')
  end

  def all_projects
    @projects = Project.all
    render :index
  end

  def finished_projects
    @projects = Project.where(completed: 'true')
    render :index
  end

  # GET /projects/1
  # GET /projects/1.json
  def show
    @back_url = session[:my_previous_url]
  end

  # GET /projects/new
  def new
    @project = Project.new(vehicle_id: params[:vehicle_id])
    @vehicles = Vehicle.where(user: current_user)
  end

  # GET /projects/1/edit
  def edit
    @vehicles = Vehicle.where(user: current_user)
  end

  # POST /projects
  # POST /projects.json
  def create
    @project = Project.new(project_params)

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

  # PATCH/PUT /projects/1
  # PATCH/PUT /projects/1.json
  def update
    respond_to do |format|
      if @project.update(project_params)
        format.html { redirect_to @project, notice: 'Project was successfully updated.' }
        format.json { render :show, status: :ok, location: @project }
      else
        format.html { render :edit }
        format.json { render json: @project.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /projects/1
  # DELETE /projects/1.json
  def destroy
    @project.destroy
    respond_to do |format|
      format.html { redirect_to projects_url, notice: 'Project was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_project
      @project = Project.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def project_params
      params.require(:project).permit(:title, :details, :vehicle_id, :completed)
    end
end

如果这有任何区别，我正在使用设计进行身份验证。谢谢！

Answer 1

让我们添加一些连接和where条件以匹配当前用户。一些替代品。

没有用户加入

@projects = Project.joins(:vehicle).
    where(vehicles: {user: current_user})

用户加入

@projects = Project.joins(vehicle: :user).
    where(users: {id: current_user.id})