Ruby on Rails：数据没有保存ActiveRecord

我是Ruby on Rails的新手，我一直在努力开发一个简单的博客。 但是，当我尝试保存新post时，页面会重新加载新页面，而不会保存任何数据。 但是数据存在于URI中。

这是我的控制器：

class PostsController < ApplicationController before_action :set_post, only: [:show, :edit, :update, :destroy] # GET /posts # GET /posts.json def index @posts = Post.all end # GET /posts/1 # GET /posts/1.json def show end # GET /posts/new def new @post = Post.new end # GET /posts/1/edit def edit end # POST /posts # POST /posts.json def create @post = Post.new(post_params) respond_to do |format| if @post.save format.html { redirect_to @post, notice: 'Post was successfully created.' } format.json { render :show, status: :created, location: @post } else format.html { render :new } format.json { render json: @post.errors, status: :unprocessable_entity } end end end # PATCH/PUT /posts/1 # PATCH/PUT /posts/1.json def update respond_to do |format| if @post.update(post_params) format.html { redirect_to @post, notice: 'Post was successfully updated.' } format.json { render :show, status: :ok, location: @post } else format.html { render :edit } format.json { render json: @post.errors, status: :unprocessable_entity } end end end # DELETE /posts/1 # DELETE /posts/1.json def destroy @post.destroy respond_to do |format| format.html { redirect_to posts_url, notice: 'Post was successfully destroyed.' } format.json { head :no_content } end end private # Use callbacks to share common setup or constraints between actions. def set_post @post = Post.find(params[:id]) end # Never trust parameters from the scary internet, only allow the white list through. def post_params params.require(:post).permit(:title, :category, :body) end end 

我修改了脚手架生成的表格：

  
   
 
 prohibited this post from being saved:
 
  
  
 
  
 
  
 
 
  
 
 
  
 
  
   

这是我的模特：

 class Post < ActiveRecord::Base validates :title, presence: true end 

这是来自服务器的日志：

 Started GET "/posts/new? utf8=%E2%9C%93&authenticity_token=QfJgH82nuYVTEa1vovO4VlIjZmMeJvBLj6bkNKDrz08%3D&post%5Btitle% 5D=Hello&post%5Bcategory%5D=Programming&post%5Bbody%5D=Hello&commit=Create+Post" for 127.0.0.1 at 2014-08-11 11:38:46 -0400 Processing by PostsController#new as HTML Parameters: {"utf8"=>"✓", "authenticity_token"=>"QfJgH82nuYVTEa1vovO4VlIjZmMeJvBLj6bkNKDrz08=", "post"=> {"title"=>"Hello", "category"=>"Programming", "body"=>"Hello"}, "commit"=>"Create Post"} Rendered posts/_form.html.erb (2.3ms) Rendered posts/new.html.erb within layouts/application (3.2ms) Completed 200 OK in 21ms (Views: 19.1ms | ActiveRecord: 0.0ms) 

Answer 1

您的问题来自无效的HTML – 您有一个外部

标记，然后是一个内部

标记（由Rails form_for生成）。 您的浏览器遵循外部表单的指令，默认情况下只是通过GET请求提交到同一页面。

您希望浏览器遵循内部表单标记，该标记告诉浏览器向创建URL提交POST请求。 因此，删除外部form标记。