显示来自不相关嵌套模型的信息

Question

我正在构建一个包含两个模型的 Rails 应用程序，两个模型都有另外两个嵌套模型：

联系人 -> 跟踪器 -> 电子邮件

和

目标 -> 阶段 -> 模板

我想在特定跟踪器的显示页面上显示来自特定目标的信息，但我正在努力让正确的数据出现。

我的 Tracker 参数中有一个 goal_id 字段，我已将此行添加到我的 Tracker 控制器，但我认为我做错了：

@goals = Goal.find(params[:id])

我确定这将是一个非常明显的错误，但我对 Rails 如此陌生，以至于我似乎无法正确处理它，我很乐意收到您的任何建议。提前致谢！

追踪器型号：

class Tracker < ApplicationRecord
  belongs_to :contact
  has_one :goal
  has_many :emails, dependent: :destroy
end

目标模型：

class Goal < ApplicationRecord
  has_many :stages , dependent: :destroy
  has_many :trackers
end

追踪器控制器：

class TrackersController < ApplicationController
  before_action :get_contact
  before_action :set_tracker, only: %i[ show edit update destroy ]

  # GET /trackers or /trackers.json
  def index
    @trackers = @contact.trackers
  end

  # GET /trackers/1 or /trackers/1.json
  def show
    @goals = Goal.find(params[:id])
  end

  # GET /trackers/new
  def new
    @tracker = @contact.trackers.build
  end

  # GET /trackers/1/edit
  def edit
  end

  # POST /trackers or /trackers.json
  def create
    @tracker = @contact.trackers.build(tracker_params)

    respond_to do |format|
      if @tracker.save
        format.html { redirect_to contact_trackers_path(@contact), notice: "Tracker was successfully created." }
        format.json { render :show, status: :created, location: @tracker }
      else
        format.html { render :new, status: :unprocessable_entity }
        format.json { render json: @tracker.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /trackers/1 or /trackers/1.json
  def update
    respond_to do |format|
      if @tracker.update(tracker_params)
        format.html { redirect_to contact_tracker_path(@contact), notice: "Tracker was successfully updated." }
        format.json { render :show, status: :ok, location: @tracker }
      else
        format.html { render :edit, status: :unprocessable_entity }
        format.json { render json: @tracker.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /trackers/1 or /trackers/1.json
  def destroy
    @tracker.destroy

    respond_to do |format|
      format.html { redirect_to contact_trackers_path(@contact), notice: "Tracker was successfully destroyed." }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def get_contact
      @contact = Contact.find(params[:contact_id])
    end


    def set_tracker
      @tracker = @contact.trackers.find(params[:id])
    end

    # Only allow a list of trusted parameters through.
    def tracker_params
      params.require(:tracker).permit(:name, :contact_id, :goal_id, :stage_id, :status, :note)
    end
end

显示跟踪器的页面视图：

  <div class="card">
    <h3>Goal</h3>
    <%= @goals.name %>

  </div>