Rails狀態機不能正常工作

Question

我正在創建一個博客應用程序，用戶可以在其中發佈並只能查看他自己的帖子。只有一個管理員可以查看每個人發佈的帖子，並具有接受或拒絕用戶發帖的功能。例如，當用戶將分享他的職位，然後管理員將批准或拒絕該職位。如果他批准該職位將在那裏，如果管理員拒絕該職位將被刪除。我正在使用狀態機，但我有一些問題。兩個按鈕批准和拒絕，但他們不工作。
我只是想當我點擊批准按鈕，所以有一個列在我的帖子表默認值爲「待定」，所以它會改變批准或拒絕我點擊的任何按鈕....如果拒絕所以後應該點擊確認按鈕未定義的方法`許可證」爲 「state_event =批准」 時被刪除
：字符串

[post.rb]

class Post < ActiveRecord::Base 
    require 'rubygems' 
    require 'state_machine' 

    has_many :documents 
    has_many :comments, dependent: :destroy 
    belongs_to :user 

    validates :title, presence: true, length: {in: 5..10} 
    validates :body, presence: true,length: {in: 5..200} 

     #:status is the column in posts table 
    state_machine :status, :initial => :pending do 
     #button name which is approve 
     event :approve do 
      transition :pending => :approve 
     end 
     event :decline do 
      transition :pending => :decline 
     end 
    end 




    def self.user_post(id) 
     role = User.find_role(id) 
     if role == 'admin' 
      Post.all 

     elsif role == 'user' 
      Post.where(user_id: id) 

     elsif role == 'developer' 
      Post.where(user_id: id) 
     end    
    end 

    def self.icon(extension) 
     case extension 
     when 'pdf' 
       EXTENSION[1]['pdf'] 
     when 'png' || 'jpg' || 'jpeg' 
      EXTENSION[0]['png'] 
     when 'doc' || 'odt' 
      EXTENSION[2]['doc'] 
     end  

    end 



####limit to upload files not more than ###### 
    def self.upload(files,post_id) 
     files.each do |file|  
     @file_extension=file.content_type.split('/')[1]   

      doc = Document.new(document: file,post_id: post_id) 
      #save is a method which will save the content in the database 
      doc.save! 
     end 
    end 
end 

[post_controller]

class PostsController < ApplicationController 
    before_action :authenticate_user! 

    def index 
     @posts = Post.user_post(current_user).order('created_at DESC').paginate(:page => params[:page], :per_page => 5) 
    end 

    def new 
     @post = Post.new 
    end 

    def show  
     @post=find_params 
    end 

    def create 
     @post = Post.new(post_params)   
     @post.user = current_user 
     if @post.save 
      Post.upload(params[:post][:files],@post.id)   
      redirect_to @post 
     else 
      render 'new' 
     end 
    end 

    def edit 
     @post = find_params 

    end 

    def update 
     @post = find_params 
     if @post.update(post_params) 
      redirect_to @post 
     else 
      render 'edit' 
     end 
    end 

    def destroy 
     @post = find_params 
     @post.destroy 
     redirect_to posts_path 
    end 

    private 
     def post_params 
      p = params.require(:post) 
      if current_user.roles=='admin' # or however you check if the user is authorized 
      p.permit(:title, :body, :state_event) 
      else 
      p.permit(:title, :body) 
      end 


     end 

     def find_params 
      Post.find(params[:id]) 
     end 

end 

[帖/ _form.html.erb]

<%= form_for @post,html: { multipart: true } do |f| %> 
    <% if @post.errors.any? %> 
     <div id="errors"> 
      <h2><%= pluralize(@post.errors.count, "error") %> prevented this post from saving:</h2> 
      <ul> 
       <% @post.errors.full_messages.each do |msg| %> 
        <li><%= msg %></li> 
       <% end %> 
      </ul> 
     </div> 
    <% end %> 
    <%= f.label :title %><br> 
    <%= f.text_field :title %><br> 
    <br> 
    <%= f.label :body %><br> 
    <%= f.text_field :body %><br> 

    <br> 
    <!-- if you want to upload multiple files at a time --> 
    <%= f.label :files %><br> 
    <%= f.file_field :files,:multiple => true %><br> 

    <br> 


    <%= f.submit %> 
    <br> 

<% end %> 
<br> 

[帖/ edit.html.erb]

<div id="page_wrapper"> 
    <h1>Edit Post</h1> 

    <%= render 'form' %> 
<br> 
     <%= form_for @post do %> 
      <%= button_to 'Approve', @post, 
     params: { post: { state_event: 'approve' } } , 
     method: :patch 
     %> 

     <%= button_to 'Decline', @post, 
     params: { post: { state_event: 'decline' } } , 
     method: :patch 
     %> 
     <% end %> 

</div> 

Answer 1

如果你想改變你的模型的狀態。

<%= button_to 'Approve', @post, 
     params: { post: { state_event: 'approve' } } 
     method: :patch 
%> 

<%= button_to 'Decline', @post, 
     params: { post: { state_event: 'decline' } } 
     method: :patch 
%> 

您還需要添加參數在強參數列表：

def post_params 
    p = params.require(:post) 
    if current_user.is_admin? # or however you check if the user is authorized 
    p.permit(:title, :body, :state_event) 
    else 
    p.permit(:title, :body) 
    end 
end 

只需使用f.submit "approve"只是改變在params哈希表的submit關鍵。

Answer 2

首先：您的按鈕同意和拒絕都會觸發相同的行爲：他們只會發送form_for @posts您的表單構建。 我想當你按下其中一個你將POST消息發送到你的應用程序post_path（@post）。 我的建議首先是分裂這個按鈕的行爲。嘗試值添加到您的按鈕，像這樣：

<%= f.button :submit , name: "subaction",value: "approve"%> 

而在你的行動，你應該看到PARAMS [：子作用] ==「批准」。