Question

我在尝试注册时遇到了困难。当我点击“注册”按钮后填写new.html.erb的所有字段后，我收到的错误是这样的：enter image description here 点击注册后，它呈现相同的页面，但是有错误列表并且全部为空。我无法弄清楚它为什么不保存而另一件事就是为什么它会给出这些错误，如果我是填补整个领域。

这是我的程序

new.html.erb

   <%= form_for @user, :html=> {:id => 'create_user'} do |f| %>
  <div class="text-center" style="font-size:16px;color:red;">
    <% if @user.errors.any? %>
      <ul>
          <% @user.errors.full_messages.each do |msg| %>
            <li><%= msg %></li>
          <% end %>
        </ul>
      <% end %>
    </div>

  <div class="form-group">
    <%= f.text_field :name, class: 'form-control', placeholder: 'Enter Name' , name: "name" , id: "name" %>

  </div>
  <div class="form-group">
    <%= f.text_field :category, list: "category", id:"select", placeholder:"Select By category" %>
      <datalist id="category">
        <select>
          <option value="Student" />
          <option value="Faculty" />
          <option value="HOD" />
          <option value="Principle" />
          <option value="Dean" />
          <option value="Chairman" />
        </select>
      </datalist>
  </div>
  <div class="form-group">
     <%= f.email_field :email, class: 'form-control', placeholder: 'Email' , name:"email" , id: "email" %>
  </div>
  <div class="form-group">
    <%= f.password_field :password, class: 'form-control', placeholder: 'Password' , name:  "password" , id:"password" %>
  </div>
  <div class="form-group">
    <%= f.password_field :password_confirmation , placeholder: "Re-type Password" , class: "form-control" , name:"password_confirmation", id:"Re_type"  %>
  </div>
  <div class="form-group">
    <div class="row" style="margin-top:20px;">
      <div class="col-lg-8 col-lg-offset-2 col-md-8 col-md-offset-2 col-sm-10 col-sm-offset-1 col-xs-10 col-xs-offset-1">
        <%= f.submit "Register", class: "btn btn-primary btn-block disabled" , id: "register" %>
      </div>
    </div>
  </div>
<% end %>

的routes.rb

Rails.application.routes.draw do
  root "users#index"
  get '/' => "users#index"
  get "/new" => "users#new"
  resources :users
  post "/users" => "users#create"
  get "users/:id" => "users#show"

  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end

users_controller.rb

Class UsersController < ApplicationController
  def index
  end

  def new
    @user = User.new
  end

  def show
  end

  def create
    @user = User.create(user_params)
    puts "======================================================================"
    puts @user
    puts "======================================================================"
    if @user.save
      session[:user_id] = @user.id
      flash[:success] = "Welcome to the My project!"
      redirect_to user_path(:id)
    else
      render :new1
    end
  end

    private

    def user_params
      params.require(:user).permit(:name,:category, :email, :password)
    end
end

user.rb

class User
  include Mongoid::Document

  field :name, type: String
  field :category, type: String
  field :email, type: String
  field :password, type: String
  validates :name, presence: true ,format: { with: /\A[a-zA-Z]+\z/} 
  validates :email, presence: true , format: { with: /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i } , uniqueness: { case_sensitive: false } 
  validates :password , presence: true 
  before_save :downcase_fields

  def downcase_fields
    self.name.downcase!
    self.category.downcase!
    self.email.downcase!
  end
end

请帮帮我。我使用mongodb作为后端并尝试存储表单字段中的数据，但它始终显示错误。它既不会将有效数据存储到数据库中。

Answer 1

您的错误会覆盖您输入的name和id。主要是name。

<%= f.email_field :email, class: 'form-control', placeholder: 'Email' , name: "email" , id: "email" %>
                                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^

删除它们，它应该工作。

说明：按rails惯例，在这种情况下，名称应为user[name]，ID应为user_name。

因为名称不是user[name]，所以强大的params方法会丢弃它。它希望name嵌套在user

下

 params.require(:user).permit(:name)

从表格

1 个答案: