没有路由匹配...缺少必需的键

Question

我有两个控制器和型号 Projects 和 Schemas。 Schemas belongs_to 个项目。 Projectshas_manyschemas。我正在寻找 http://localhost:3000/projects/SLUG-PROJECT/schemas/SLUG-SCHEMA.

以下是我的 SchemaController 代码：

class Projects::SchemasController < ApplicationController
  before_action :set_schema, only: [:show, :edit, :update, :destroy]
  before_action :set_project, only: [:index, :show, :new, :edit, :update, :destroy]


  def index
    @schemas = Schema.all
  end


  def show
  end


  def new
    @schema = Schema.new
  end


  def edit
  end


  def create
    @schema = Schema.new(schema_params)

    respond_to do |format|
      if @schema.save
        format.html { redirect_to project_url(@schema.project_id), notice: 'Schema was successfully created.' }
      else
        format.html { render :new }
      end
    end
  end


  def update
    respond_to do |format|
      if @schema.update(schema_params)
        format.html { redirect_to project_url(@schema.project_id), notice: 'Schema was successfully updated.' }
      else
        format.html { render :edit }
      end
    end
  end



  def destroy
    @schema.destroy
    respond_to do |format|
      format.html { redirect_to project_url(@schema.project_id), notice: 'Schema was successfully destroyed.' }
    end
  end




  private

    def set_schema
      @schema = Schema.find(params[:id])
    end

    def set_project
      @project = Project.friendly.find(params[:project_id])
    end


    def schema_params
      params.require(:schema).permit(:number, :identification, :reference, :name, :description, :author, :controller, :priority, :notes, :status, :cycle, :slug, :project_id)
    end

end

这是我的代码：

respond_to do |format|
  if @schema.update(schema_params)
    format.html { redirect_to project_url(@schema.project_id), notice: 'Schema was successfully updated.' }
  else
    format.html { render :edit }
  end

它适用于索引和显示页面，但我在更新、编辑和销毁时收到以下错误：

ActionController::UrlGenerationError in Projects::SchemasController#update

No route matches {:action=>"show", :controller=>"projects", :id=>nil} missing required keys: [:id]

谁能帮我弄清楚这是怎么回事？

Answer 1

你要找的是嵌套路由。在这种情况下，您可以包含此路由声明：

resources :projects do
  resources :schemas
end

除了 projects 的路由之外，此声明还将 schemas 路由到 SchemasController。 schema 网址需要 project:

/projects/:project_id/schemas/:id

这还将创建路由助手，例如 project_schemas_url 和 edit_project_schema_path。这些助手将 Project 的实例作为第一个参数：project_schemas_url(@project).

并记住始终在现有 project 上实例化 schemas，例如：

@project.schemas.build

没有路由匹配...缺少必需的键

No route matches ... missing required keys

ruby

ruby-on-rails

friendly-id