我试图在Rails 4中制作一个应用程序.
我试图用政治家宝石为国家,然后权威的政策.
我的gemfile有：
gem 'statesman','~> 1.3','>= 1.3.1' gem 'pundit'
我有一个文章模型和一个文章转换模型和一个article_state_machine模型.
我的目标是在我的文章政策中定义一个发布政策(使用专家),允许拥有文章的用户发布该文章,如果它处于“已批准”状态.
我在我的专家文章政策中试图这样做：
class ArticlePolicy < ApplicationPolicy def publish? user.present? && user == article.user # if requires approval,then approved # and article.in_state(:approve) - why doesnt this work - see statesman docs? # user && user.article.exists?(article.id) end end
当我尝试检查文章是否处于状态：approve(如上面注释的),我收到一条错误消息,说明未定义的方法’in_state’.
在策略中如何使用状态机？或者是意图该策略允许用户随时发布,但是当文章处于状态批准时,您只会在文章显示页面上显示按钮(尽管我认为这是专家点).
Article.rb
class Article < ActiveRecord::Base
include Statesman::Adapters::ActiveRecordQueries
has_many :transitions,class_name: "ArticleTransition",autosave: false
def state_machine
@state_machine ||= ArticleStateMachine.new(self,transition_class: ArticleTransition,association_name: :transitions)
end
# delegate :can_transition_to?. :trans
# def reindex_articles
# article.reindex_async
# end
private
def self.transition_name
:transitions
end
def self.transition_class
ArticleTransition
end
def self.initial_state
# ArticleTransition.initial_state
:draft
end
end
文章状态机型号：
class ArticleStateMachine
include Statesman::Machine
state :draft,initial: :true #while author is drafting
state :review #while approver comments are being addressed (really still in draft)
state :reject # not suitable for publication
state :approve # suitable for publication
state :publish #published
state :remove # destroyed
# state :spotlight
transition from: :draft,to: [:reject,:approve,:publish,:remove]
# transition from: :review,to: [:rejected,:approved,:removed]
transition from: :reject,to: [:draft,:remove]
transition from: :approve,to: [:publish,:remove]
transition from: :publish,to: :remove
end
文章转换模式：
class ArticleTransition < ActiveRecord::Base include Statesman::Adapters::ActiveRecordTransition belongs_to :article,inverse_of: :article_transitions end
文章控制人：
def approve
article = Article.find(params[:id])
if article.state_machine.transition_to!(:approve)
flash[:notice] = "This article has been approved for publication"
redirect_to action: :show,id: article_id
# add mailer to send message to article owner that article has been approved
else
flash[:error] = "You're not able to approve this article"
redirect_to action: :show,id: article_id
end
end
def publish
article = Article.find(params[:id])
authorize @article
if article.state_machine.transition_to!(:publish)
redirect_to action: :show,id: article_id
# how do you catch the date the state became published?
else
flash[:error] = "You're not able to publish this article"
redirect_to action: :show,id: article_id
end
end
谁能看到我做错了什么？
整篇文章控制器有：
class ArticlesController < ApplicationController
before_action :set_article,only: [:show,:edit,:update,:destroy,:reject,:remove]
before_action :authenticate_user!,except: [:index,:show,:search,:remove]
respond_to :html,:json
# GET /articles
# GET /articles.json
def index
@articles = policy_scope(Article)
# query = params[:query].presence || "*"
# @articles = Article.search(query)
end
# def index
# if params[:query].present?
# @books = Book.search(params[:query],page: params[:page])
# else
# @books = Book.all.page params[:page]
# end
# end
# GET /articles/1
# GET /articles/1.json
def show
end
# GET /articles/new
def new
@article = Article.new
@article.comments.build
end
# GET /articles/1/edit
def edit
authorize @article
end
# POST /articles
# POST /articles.json
def create
# before_action :authenticate_user!
# authorize @article
@article = current_user.articles.new(article_params)
respond_to do |format|
if @article.save
format.html { redirect_to(@article) }
format.json { render :show,status: :created,location: @article }
else
format.html { render :new }
format.json { render json: @article.errors,status: :unprocessable_entity }
end
end
end
def search
if params[:search].present?
@articless = Article.search(params[:search])
else
@articles = Articles.all
end
end
# PATCH/PUT /articles/1
# PATCH/PUT /articles/1.json
def update
# before_action :authenticate_user!
authorize @article
respond_to do |format|
# if @article.update(article_params)
# format.json { render :show,status: :ok,location: @article }
# else
# format.html { render :edit }
# format.json { render json: @article.errors,status: :unprocessable_entity }
# end
# end
if @article.update(article_params)
format.html { redirect_to(@article) }
format.json { render :show,location: @article }
else
format.json { render json: @article.errors,status: :unprocessable_entity }
end
format.html { render :edit }
end
end
# DELETE /articles/1
# DELETE /articles/1.json
def destroy
before_action :authenticate_user!
authorize @article
@article.destroy
respond_to do |format|
format.json { head :no_content }
end
end
# def review
# article = Article.find(params[:id])
# if article.state_machine.transition_to!(:review)
# flash[:notice] = "Comments on this article have been made for your review"
# redirect_to action: :show,id: article_id
# else
# flash[:error] = "You're not able to review this article"
# redirect_to action: :show,id: article_id
# end
# end
def reject
end
def approve
article = Article.find(params[:id])
if article.state_machine.transition_to!(:approve)
flash[:notice] = "This article has been approved for publication"
redirect_to action: :show,id: article_id
end
end
def publish
article = Article.find(params[:id])
if article.state_machine.transition_to!(:publish)
redirect_to action: :show,id: article_id
end
end
def remove
article = Article.find(params[:id])
if article.state_machine.transition_to!(:remove)
redirect_to root_path
else
flash[:error] = "You're not able to destroy this article"
redirect_to action: :show,id: article_id
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_article
@article = Article.find(params[:id])
authorize @article
end
# Never trust parameters from the scary internet,only allow the white list through.
def article_params
params.require(:article).permit(:body,:title,:image,:tag_list,comment_attributes: [:opinion])
end
end
解决方法
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