ruby-on-rails - rails : form submission isn't properly creating attributes?

Question

我正在尝试制作一个应用程序来制作属于许多用户的相册，并且用户可以拥有多个相册。但是，每当我尝试创建相册时，我的 @user.album.count 似乎都没有改变。

专辑/new.html.erb

<%= form_for (@album), url: user_albums_path, :html => { :id => "uploadform", :multipart => true } do |f| %>
<div>
    <%= f.label :name %>
    <%= f.text_field :name %>


    <%= f.label :description %>
    <%= f.text_area :description %>

    <br>

    <%=f.submit %>
</div>
<% end %>

相册 Controller

class AlbumsController < ApplicationController

    def index
      @user = User.find(params[:user_id])
      @albums = @user.albums.all

      respond_to do |format|
        format.html
        format.json { render json: @albums }
      end
    end

    def show
      @albums = Album.all
      @album = Album.find(params[:id])
      @photo = Photo.new
    end

    def update
    end

    def edit
    end

    def create
      @user = User.find(params[:user_id])
      @album = @user.albums.build(params[:album])
      respond_to do |format|
        if @album.save
          format.html { redirect_to user_path(@user), notice: 'Album was successfully created.' }
          format.json { render json: @album, status: :created, location: @album}
        else
          format.html { render action: "new" }
          format.json { render json: @album.errors, status: :unprocessable_entity }
        end
      end 
    end

    def new
      @user = User.find(params[:user_id])
      @album = Album.new
    end

    def destroy
    end

end

型号

#album model
class Album < ActiveRecord::Base
  attr_accessible :avatar, :name, :description
  has_many :user_albums
  has_many :users, :through => :user_albums
  has_many :photos
end


#user model
class User < ActiveRecord::Base

  has_secure_password
  attr_accessible :email, :name, :password, :password_confirmation
  validates_presence_of :password, :on => :create

  validates_format_of :name, :with => /[A-Za-z]+/, :on => :create
  validates_format_of :email, :with => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i, :on => :create
  validates_length_of :password, :minimum => 5, :on => :create

  has_many :user_albums
  has_many :albums, :through => :user_albums
  accepts_nested_attributes_for :albums

end

  #photo model (not up to there yet)
  class Photo < ActiveRecord::Base
    belongs_to :album
  end

配置/路线

Pholder::Application.routes.draw do
resources :users do
  resources :albums 
end

resources :albums do
  resources :photos
end

root :to => "users#index"

---

这是我的控制台

于 2012-10-01 17:41:59 -0400 开始获取 127.0.0.1 的“/assets/application.js?body=1” 服务 Assets /application.js - 304 未修改(0 毫秒) [2012-10-01 17:41:59] 警告无法确定响应正文的内容长度。设置响应的内容长度或设置 Response#chunked = true

于 2012-10-01 17:42:11 -0400 开始为 127.0.0.1 发布“/users/13/albums” 由 AlbumsController#create as HTML 处理 参数: {"utf8"=>"✓", "authenticity_token"=>"ttqQnEt1KFuwvYRU6MuOLgc5UprSE/zMzGMuzzZiZiE=", "album"=>{"name"=>"fdsafds", "description"=>"fdafdsfafdsfadsfsdsa"}, "commit"=>"创建相册","user_id"=>"13"} 用户负载(0.1ms) SELECT "users".* FROM "users"WHERE "users"."id"= ?限制 1 [["id", "13"]] (0.0ms) 开始事务 SQL (0.3ms) INSERT INTO "albums"("created_at", "description", "name", "updated_at") VALUES (?, ?, ?, ?) [["created_at", Mon, 01 Oct 2012 21: 42:11 UTC +00:00]，[“描述”，“fdafdsfafdsfadsfsdsa”]，[“名称”，“fdsafds”]，[“updated_at”，2012 年 10 月 1 日星期一 21:42:11 UTC +00:00 ]] (5.6ms) 提交事务 重定向至http://localhost:3000/users/13 9 毫秒内完成 302 发现(ActiveRecord:6.0 毫秒)

Answer 1

好的，我发现了问题。当您通过用户创建相册时，使用构建方法

@album = @user.albums.build(params[:album])

然后就是你要保存的用户，

@user.save

所以你的新创建方法是

def create
  @user = User.find(params[:user_id])
  @album = @user.albums.build(params[:album])
  respond_to do |format|
    if @user.save
      print @album.errors
      format.html { redirect_to user_path(@user), notice: 'Album was successfully created.' }
      format.json { render json: @album, status: :created, location: @album}
    else
      format.html { render action: "new" }
      format.json { render json: @album.errors, status: :unprocessable_entity }
    end
  end
end