嵌套路由和form_for 以及使用has_one 和belongs_to 的模型 [英] nested routes and form_for and models using has_one and belongs_to

问题描述

如何使用嵌套路由映射 has_one 模型，以及如何在 RESTful 数据库之后为/localhost:3000/users/1/profile/new,html.erb 添加 form_for?

用户有一个个人资料.

模型

类简介

views/profiles/new.html.erb

关于你
<div class="row"><div class="span6 offset3"><%= form_for(@profile) 做 |f|％＞<%= 渲染 'shared/error_messages' %><%= f.label :name %><%= f.text_field :name %><%= f.label :surname %><%= f.text_field :surname %><%= f.submit 创建我的账户"，类别:btn btn-large btn-primary"%><%结束%>

控制器:Profiles_controller.rb我发现了两个错误，因为我不太明白为什么它不起作用.

class ProfilesController <应用控制器定义索引结尾高清秀结尾定义新# @user = User.find(params[:id]) # 错误信息:无法找到没有 ID 的用户# @profile = @user.build_profile()@profile = current_user.build_profile(params[:id]) # 错误信息:未知属性:user_id结尾定义编辑结尾定义创建结尾定义更新结尾销毁结尾结尾

Helpers:SessionHelper(说明current_user)模块会话助手定义登录(用户)cookies.permanent[:remember_token] = user.remember_tokenself.current_user = 用户结束

 def signed_in?!current_user.nil?结尾def current_user=(用户)@current_user = 用户结尾def current_user?(用户)用户 == 当前用户结尾定义当前用户@current_user ||= User.find_by_remember_token(cookies[:remember_token])结尾定义退出self.current_user = nilcookies.delete(:remember_token)结尾def signed_in_user除非已登录?店面位置redirect_to signin_path，注意:请登录."结尾结尾结尾

解决方案

您的配置文件表是否有 user_id 属性?

在您的路线中，个人资料应该是单一的，因为一个用户有一个个人资料:

资源:用户做资源:个人资料资源:进度图表资源 :calories_journals结尾

到用户配置文件的路由将是 users/:user_id/profile(而不是 users/:user_id/profile/:id

在您的profiles_controller中:

@profile = current_user.build_profile(params[:id]) # 为什么是 params[:id]?#它应该只是@profile = current_user.build_profile()@user = User.find(params[:user_id])

表格类似于:

form_for [@user, @profile] do |f|...结尾

您真的希望用户像这样创建他的个人资料吗?通常，您会在用户注册时创建个人资料.

How to map out has_one model with nested routes and how to add a form_for for /localhost:3000/users/1/profile/new,html.erb following RESTful database?

User has one Profile.

Models

class Profile < ActiveRecord::Base
  attr_accessible :name, :surname
  belongs_to :user
end

class User < ActiveRecord::Base
  attr_accessible :email, :email_confirmation, :password, :password_confirmation
  has_secure_password
  has_one :profile, dependent: :destroy
end

  resources :users do
    resources :profiles      (note: has_one profile)
    resources :progress_charts
    resources :calories_journals
  end

views/profiles/new.html.erb

<h1>About You</h1>
<div class="row">
  <div class="span6 offset3">
    <%= form_for(@profile) do |f| %>
    <%= render 'shared/error_messages' %>

      <%= f.label :name %>
      <%= f.text_field :name %>

      <%= f.label :surname %>
      <%= f.text_field :surname %>

      <%= f.submit "Create my account", class: "btn btn-large btn-primary" %>
    <% end %>
  </div>
</div>

controller: Profiles_controller.rb Two errors I have discovered as I do not quite understand why it wasn't working.

class ProfilesController < ApplicationController
def index
end

def show
end

  def new
  #  @user = User.find(params[:id]) # Error message: Couldn't find User without an ID
  #  @profile = @user.build_profile()

    @profile = current_user.build_profile(params[:id]) # Error message: unknown attributes: user_id
  end

  def edit
  end

  def create
  end

  def update
  end

  def destroy
  end
end

Helpers: SessionHelper (to illustrate current_user) module SessionsHelper def sign_in(user) cookies.permanent[:remember_token] = user.remember_token self.current_user = user end

  def signed_in?
    !current_user.nil?
  end

  def current_user=(user)
    @current_user = user
  end

  def current_user?(user)
    user == current_user
  end

  def current_user
    @current_user ||= User.find_by_remember_token(cookies[:remember_token])
  end

  def sign_out
    self.current_user = nil
    cookies.delete(:remember_token)
  end

  def signed_in_user
    unless signed_in?
      store_location
      redirect_to signin_path, notice: "Please sign in."
    end
  end
end

解决方案

Does your profiles table has a user_id attribute?

In your routes, profile should be singular, since a user has one profile:

resources :users do
    resource  :profile
    resources :progress_charts
    resources :calories_journals
end

The route to a user profile will be users/:user_id/profile (and not users/:user_id/profile/:id

In your profiles_controller:

@profile = current_user.build_profile(params[:id]) # why params[:id]?
#it should just be
@profile = current_user.build_profile()
@user = User.find(params[:user_id])

And the form would be something like:

form_for [@user, @profile] do |f|...
end

Do you really want the user to create his profile like that? Usually, you would create the profile when a user register.

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