使用Rails4中的update_attributes更新表單數據

Question

我試圖通過Rails4中的「用戶」控制器中的「更新」動作來更新用戶表中的用戶數據。我正在使用PostgreSQL數據庫。

問題：當我去「編輯」行動，我得到正確呈現的形式。在填寫表格中的一列或多列數據後，當我按下「更新配置文件」按鈕更新用戶數據時，然後形成頁面重定向並返回到相同的編輯頁面，但現在URL已更改。數據未保存在數據庫中。它僅在表單域中顯示。即使配置文件圖片正在上傳，但其鏈接並未保存在數據庫中。

例子：

更新之前 - >網址：http://localhost:3000/users/edit?id=2

後更新 - > URL：http://localhost:3000/users/update/2

但新輸入的數據並沒有得到保存在數據庫中。我也檢查了軌道服務器日誌，但我不明白，表單有什麼問題。通過rails控制檯，我嘗試更新用戶的數據，但仍然無法將數據保存到數據庫中。請檢查截圖。

Rails的服務器日誌：

Rails的控制檯：

用戶控制器：

class UsersController < ApplicationController 
     def edit 
     @user = User.find("#{@current_user_id}") 
     end 

     def update 
     User.transaction do 
      @user = User.find(params[:id]).lock! 
      if @user.update_attributes(user_params) 
      Welcome.profile_data_updated(@user).deliver_now 
      redirect_to(:controller => 'users', :action => 'profile', :id => @current_user_id) 
      else 
      render('edit') 
      end 
     end 
     end 
    protected 
    def user_params 
    params.require(:user).permit(:username, :user_image, :first_name, :last_name, :password, :email, :street_address, :city, :state, :country, :postal_code, :mobile_number) 
    end 
end 

調用createUsers遷移文件：

class CreateUsers < ActiveRecord::Migration 
    def change 
    create_table :users do |t| 
    t.string :username, null: false 
    t.string :user_image 
    t.string :first_name, null: false 
    t.string :last_name, null: false 
    t.string :password_digest, null: false 
    t.string :email, null: false 
    t.string :street_address 
    t.string :city 
    t.string :state 
    t.string :country 
    t.string :postal_code 
    t.string :mobile_number 
    t.string :validation_code 
    t.string :user_status, null: false, :default => '1' # 0 for deactivated 
    t.timestamps null: false 
    end 
    end 

    def down 
    drop_table :users 
    end 
end 

用戶模型：

class User < ActiveRecord::Base 
    has_secure_password 
    validates_confirmation_of :password 

    include CarrierWave::RMagick  
    mount_uploader :user_image, ImageUploader 


    validates_presence_of :username, :format => {:with => /\A[a-zA-Z0-9]+\Z/, :message => 'Username can only contain Alphabets'} 
    validates_presence_of :first_name,:last_name,:password,:email 
    validates_uniqueness_of :username, :email 
    validates_format_of :email, with: /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i, :on => :create 
    validates_numericality_of :postal_code, :mobile_number, :on => :update 

    def full_name 
     "#{first_name} #{last_name}" 
    end 

    def location 
     "#{street_address}, #{city}, #{state}, #{country}, #{postal_code}" 
    end 
end 

Update.html.erb文件：

<%= form_for @user, url: { action: "update", :id => @user.id }, method: :post, html: { multipart: true, class: "ui form"} do |f| %> 
     <div align="center"><%= image_tag @user.user_image.to_s, :size => "200x200" %></div> 
     </br> 
     <div align="center"> 
     <%= f.file_field :user_image %> 
     </div> 

    <h4 class="ui dividing header">Billing Information</h4> 
    <div class="field"> 
     <%= f.label "Name" %> 

     <div class="three fields"> 
      <div class="field"> 
       <%= f.text_field :username, :placeholder => 'Username' %> 
      </div> 
      <div class="field"> 
       <%= f.text_field :first_name, :placeholder => 'First Name' %> 
      </div> 
      <div class="field"> 
       <%= f.text_field :last_name, :placeholder => 'Last Name' %> 
      </div> 
     </div> 
    </div> 

    <div class="field"> 
     <%= f.label "Billing Address" %> 
      <div class="fields"> 
       <div class="ten wide field"> 
        <%= f.text_field :street_address, :placeholder => 'Street Address' %> 
       </div> 
       <div class="three wide field"> 
        <%= f.text_field :city, :placeholder => 'City' %> 
       </div> 
       <div class="three wide field"> 
        <%= f.text_field :postal_code, :placeholder => 'Postal Code' %> 
       </div> 
      </div> 
    </div> 

    <div class="two fields"> 
     <div class="field"> 
      <%= f.label "State" %> 
      <%= f.text_field :state, :placeholder => 'State' %> 
     </div> 
     <div class="field"> 
      <%= f.label "Country" %> 
      <%= f.text_field :country, :placeholder => 'Country' %> 
     </div> 
    </div> 

    <h4 class="ui dividing header">Contact Information</h4> 
    <div class="two fields"> 
     <div class="disabled field"> 
      <%= f.label "Email" %> 
      <%= f.text_field :email, :disabled => true %> 
     </div> 
     <div class="field"> 
      <%= f.label "Contact" %> 
      <%= f.text_field :mobile_number, :placeholder => 'Mobile Number' %> 
     </div> 
    </div> 

    <h4 class="ui dividing header">Security</h4> 
    <div class="two fields"> 
     <div class="field"> 
      <%= f.label "New Password" %> 
      <%= f.password_field :password, :placeholder => 'New Password' %> 
     </div> 
     <div class="field"> 
      <%= f.label "Retype Password" %> 
      <%= f.password_field :password_confirmation, :placeholder => 'Retype Password' %> 
     </div> 
    </div> 
     <div> 
     <%= f.submit "Update Profile", data: { disable_with: "Updating..." }, class: 'ui green button pull-right'%> 
     </div> 
<% end %> 

我認爲：

1. 也許在「更新」操作中有錯誤。但是如果出現任何錯誤，那麼Rails必須在處理表單時發生錯誤。
2. 受保護的方法「user_params」可能會保護數據不被提交。由於我沒有填寫所有表格欄。我在1到多個表單域中輸入數據。
3. 在編輯表單中可能有錯誤。

新的服務器日誌：

用戶控制器，帶有註冊操作：

def signup 
    @user = User.new 
    end 

    def create 
    @user = User.new(user_params) 
    if @user.save 
     Welcome.welcome(@user).deliver_now 
     redirect_to(:controller => 'access', :action => 'login') 
    else 
     render('signup') 
    end 
    end 

申請表單：

<%= form_for(:user, :html => {:multipart => true }, :url => {:controller => 'users',:action => 'create'}) do |f| %> 

        <h3 class="nomargin">Sign Up</h3> 
        <p class="mt5 mb20">Already a member? <%= link_to "Login" , {:controller => 'access', :action => 'login'} %><br><br> 

        <label class="control-label">Username</label> 
        <%= f.text_field :username, class: 'form-control' ,placeholder:'Username' %></br> 

        <label class="control-label">Email</label> 
        <%= f.text_field :email, class: 'form-control' ,placeholder:'Email' %></br> 

        <label class="control-label">Profile Picture</label> 
        <%= f.file_field(:user_image) %></br> 

        <label class="control-label">Name</label> 
        <div class="row mb10"> 
         <div class="col-sm-6"> 
          <%= f.text_field :first_name, class: 'form-control', placeholder: 'First Name' %></br> 
         </div> 
         <div class="col-sm-6"> 
          <%= f.text_field :last_name, class: 'form-control', placeholder: 'Last Name' %></br> 
         </div> 
        </div> 

        <div class="mb10"> 
         <label class="control-label">Password</label> 
         <%= f.password_field :password, class: 'form-control', placeholder: 'Password' %></br> 
        </div> 

        <div class="mb10"> 
         <label class="control-label">Retype Password</label> 
         <%= f.password_field :password_confirmation, class: 'form-control', placeholder: 'Retype Password' %></br> 
        </div> 

        <button class="btn btn-success btn-block">Sign Up</button>  
       <% end %> 

Answer 1

在你第一次在錯誤日誌中發佈指示更新時不允許的參數=>：通過word_confirmation。

請嘗試添加：password_confirmation到您的強參數驗證。

def user_params 
    params.require(:user).permit(:username, :user_image, :first_name, :last_name, :password, :email, :street_address, :city, :state, :country, :postal_code, :mobile_number, :password_confirmation) 
    end 

請讓我知道如何去。

後強參數更新第變化包括表單字段password_confirmation和討論

請嘗試改變這一點：

class UsersController < ApplicationController 
     def edit 
     @user = User.find("#{@current_user_id}") 
     end 

要這樣：

 class UsersController < ApplicationController 
     # Precursor action to rendering the edit user view 
     def edit 
      @user = User.find(params[:id]) 
     end