ruby-on-rails - 需要旧密码才能创建新密码

Question

现在，每次我在用户/编辑中进行任何更改时，表单都要求用户设置一个新密码。我希望它仅在输入新密码的情况下才要求输入当前密码(如何要求输入当前密码？)。我要如何实现这一点，非常感谢。

<%= form_for(@user, :html => {:multipart => true}) do |f| %>
  <%= render 'shared/error_messages', object: f.object %>
  <%= f.text_field :name, placeholder: :name %>
  <%= f.text_field :email, placeholder: :email %>
  <%= f.password_field :password, placeholder: "Enter new password" %>
  <%= f.password_field :password_confirmation, placeholder: "Confirm new password" %>
  <%= f.submit "Save changes", class: "btn btn-large btn-primary" %>
<% end %>

Answer 1

使用rails_has_elegance和Web上的一些信息，我提出了以下解决方案。

用户/编辑 View :

<%= form_for(@user, :html => {:multipart => true}) do |f| %>
  <%= render 'shared/error_messages', object: f.object %>
  <%= f.text_field :name, placeholder: :name %>
  <%= f.text_field :email, placeholder: :email %>
  <%= password_field_tag :current_password, params[:current_password], placeholder: "Current password" %>
  <%= f.password_field :password, placeholder: "New password (optional)" %>
  <%= f.password_field :password_confirmation, placeholder: "Confirm new password" %>
<% end %>

用户模型:

validates :password, :on => :create
validates :password_confirmation, presence: true, :on => :update, :unless => lambda{ |user| user.password.blank? }

用户 Controller :

def update
  @user = User.find(params[:id])
  user = User.find_by_email(current_user.email).try(:authenticate, params[:current_password])
  if user && @user.update_attributes(params[:user])
    flash[:success] = "Profile updated"
    sign_in @user
    redirect_to @user
  else
    flash.now[:error] = "Incorrect Current Password" unless user
    sign_in @user
    render 'edit'
  end
end