如何僅在密碼不爲空的情況下對密碼進行加密

Question

在此處輸入代碼我正在使用MD5來加密我的密碼，但是，在編輯用戶配置文件時，用戶傾向於不編輯其密碼。所以保持原樣。但在我的實現中，密碼始終更新。

Here is the code in my account model.rb 
    class Admin::Account < ActiveRecord::Base 
     require 'digest/md5' 
     acts_as_reader 
     before_save :encrypt_password 

     def encrypt_password 
     self.password = Digest::MD5.hexdigest(password) 
     end 
    end 

// 編輯 類聯繫:: AccountsController <的ApplicationController

before_filter :check_login, only: [:new, :index, :edit, :show, :destroy] 
    before_action :set_admin_locale, only: [:new, :index, :edit, :show, :destroy,:create,:update] 
    layout 'admin_layout' 
    # before_action :set_admin_account, only: [:show, :edit, :update, :destroy] 

    # GET /admin/accounts 
    # GET /admin/accounts.json 

    def update_user 
    @admin_account = Admin::Account.find(params[:id]) 
    respond_to do |format| 
    if @admin_account.update(admin_account_params) 
     @success = true 
     session[:nationality] = @admin_account.nationality 
     format.js 
    else 
     @success = false 
     format.js 
    end 
    end 
    end 

    private 
    # Use callbacks to share common setup or constraints between actions. 
    def set_admin_account 
    @admin_account = Admin::Account.find(params[:id]) 
    end 

    # Never trust parameters from the scary internet, only allow the white list through. 
    def admin_account_params 
    gender = "M" 
    if params[:admin_account][:gender] == "Female" 
     gender = "F" 
    end 
    if params[:admin_account][:password] != "" 
     params.require(:admin_account).permit(:email, :password, :name, :account_type, :student_number, :nationality,:photo,:date_of_birth).merge(:gender => gender) 
    else 
     params.require(:admin_account).permit(:email, :name, :account_type, :student_number, :nationality,:photo,:date_of_birth).merge(:gender => gender) 
    end 
    end 

    def register_account 
    gender = "M" 

    if params[:admin_account][:gender] == "Female" 
     gender = "F" 
    end 

    if params[:admin_account][:student_number].present? 
     params.require(:admin_account).permit(:email, :password, :name, :password_confirmation, :student_number,:nationality,:photo,:date_of_birth).merge(:account_type => 'Student', :gender => gender) 
    else 
     params.require(:admin_account).permit(:gender,:email, :password, :name, :password_confirmation,:nationality,:photo,:date_of_birth).merge(:account_type => 'Not Student',:gender => gender) 
    end 
    end 

end 

Answer 1

提出一個條件，你encrypt_password方法

def encrypt_password 
    if password.present? and !password.blank? 
    self.password = Digest::MD5.hexdigest(password) 
    end 
end