我正在使用用户身份验证构建一个小Rails应用程序。它是一个应用程序，您可以在其中组织项目，在其中添加任务，添加一些注释。
当我是当前用户时，我可以点击“启动项目”＆＃39;并看到一个表格。但是当我提交表单时，它会将我重定向到项目索引（这是我想要的），但它并没有保存项目;我有错误信息。无论如何，你可以用代码看到它：
这是我的project.rb：
class Project < ActiveRecord::Base
belongs_to :user
validates_presence_of :name, :deadline, :description
attr_accessor :name, :deadline, :description
end
这是我的projects_controller.rb：
class ProjectsController < ApplicationController
include ActiveModel::Model
attr_accessor :name, :deadline, :description
validates :name, presence: true
validates :deadline, presence: true
validates :description, presence: true
def index
@projects = Project.all
end
def new
@project = Project.new
end
def create
@project = Project.new(project_params)
if @project.save
redirect_to projects_show_path, notice: 'Project successfully added'
else
flash[:alert] = 'An error ocurred adding your project. Please try again later'
redirect_to projects_index_path
end
end
def show
@current_user = User.find(params[:id])
@project = Project.find(params[:id])
end
def edit
@project = Project.find(params[:id])
end
def update
@project = Project.find(params[:id])
if @project.update_attributes(project_params)
redirect_to projects_index_path
else
flash[:alert] = "An occurred editing your project. Please try again later"
redirect_to projects_index_path
end
end
def destroy
@project = Project.find(params[:id])
if @project.destroy
redirect_to projects_index_path
else
flash[:alert] = "An error occured deleting your project... Please try again later"
redirect_to projects_index_path
end
end
private
def project_params
params.require(:project).permit(:name, :deadline)
end
end
这是我的projects/index.html.erb：
<body id="projects-index-body">
<div id="welcome-projects">
<h1>Hi <% @current_user %> ! Start managing your projects !</h1>
</div>
<div id="projects-index-container>">
<% if @project.nil? %>
<div id="no-project">
<p>You don't have any projects <%= link_to 'yet', projects_new_path %>.</p>
</div>
<% else %>
<%= render @projects %>
<% end %>
</div>
</body>
这是我的_form.html.erb：
<div id="form-new-project-container">
<%= form_for @project do |f| %>
<div id="form-input">
<%= f.text_field :name, placeholder: 'Project name', autofocus: true %>
</div>
<div id="form-input">
<%= f.text_field :deadline, placeholder: 'What is your project deadline ?', autofocus: true %>
</div>
<div id="form-input">
<%= f.text_area :description, placeholder: 'Add a description', autofocus: true, style: 'height:100px' %>
</div>
<div id="form-submit">
<%= f.submit('Add project', class: 'submit-btn') %>
</div>
<% end %>
</div>
这是我的_projects.html.erb：
<div id="name-container">
<%= link_to "#{@projects.name}", project %>
</div>
这是我的routes.rb：
Rails.application.routes.draw do
get 'projects/index'
get 'projects/show'
get 'projects/edit'
get 'projects/new'
get 'welcome/index'
get 'welcome/about'
resources :projects
devise_for :users, :controllers => { :omniauth_callbacks => "users/omniauth_callbacks" }
resources :users do
delete 'users/sign_out' => "devise/sessions#destroy"
end
authenticated :users do
root to: 'projects#index', as: :authenticated_root
end
root 'welcome#index'
end
development.log中的日志：
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Completed 200 OK in 74ms (Views: 72.7ms | ActiveRecord: 0.1ms)
Started GET "/projects/new" for ::1 at 2016-10-12 17:10:20 +1100
Processing by ProjectsController#new as HTML
Rendered projects/_form.html.erb (1.7ms)
Rendered projects/new.html.erb within layouts/application (2.7ms)
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Unpermitted parameter: description
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我之前已经完成过这样的项目，这个问题从未发生过。这就是我不明白的原因。我当然想念一些东西。
希望你能弄清楚:)我还在努力......
答案 0 :(得分：0)
如果您使用的是Rails 4及更高版本，则不应将attr_accessor用于数据库中持久存储的属性。这可能导致这些属性无法正确保存。
尝试删除attr_accessor行代码并依赖强参数：
def project_params
params.require(:project).permit(:name, :deadline, :description)
end
在您的代码中，您忘记了:description
此外，您设置创建操作的方式可防止您看到任何验证错误。相反，您可以创建类似于此的动作，其中原始表单在未能保存时重新呈现：
def create
@project = Project.new(project_params)
if @project.save
redirect_to projects_show_path, notice: 'Project successfully added'
else
flash[:alert] = 'An error ocurred adding your project. Please try again later'
render 'new'
end
end
您还必须确保在视图中使用您的表单显示错误消息。这样的事情：
<% if @project.errors.any? %>
<ul>
<% @project.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
<% end %>