好的，所以我终于弄清楚了！

将以下内容添加到您的类RegistrationsController< devise :: RegistrationsController

  def update 
如果resource.update_with_password（params [resource_name]）
 set_flash_message：通知，更新
 sign_in resource_name，resource，：bypass => true 
 redirect_to after_update_path_for（resource）
 else 
 clean_up_passwords（resource）
 render_with_scope：edit 
 end 
 end 
 

然后以下到您的用户模型：

  def update_with_password（params = {}）
 current_password = params.delete（：current_password）if！params [：current_password] .blank？ 

如果params [：password] .blank？ 
 params.delete（：password）
 params.delete（：password_confirmation）if params [：password_confirmation] .blank？ 
 end 

 result = if has_no_password？ || valid_password？（current_password）
 update_attributes（params）
 else 
 self.errors.add（：current_password，current_password.blank？？：blank：：invalid）
 self.attributes = params 
 false 
 end 

 clean_up_passwords 
 result 
 end 

 def has_no_password？ 
 self.encrypted_pa​​ssword.blank？ 
 end 
 

我稍微困惑的唯一的一点是在编辑视图中： / p>

 <％if！current_user.has_no_password？ ％GT; 
 

我把它包好了，如果，我会以为会是：

 <％if current_user.has_no_password？ ％GT; 
 

如果任何人可以看到任何东西来改善我的代码，或者使用不同的，更有效的方式让我知道！ / p>

Now I realise this topic has been covered many times before. However there did not appear to be a solution that wanted to make the current password field exempt only when the password in the database was blank.

I currently have the password required in my user model like:

def password_required?
  (authentications.empty? || !password.blank?) && super
end

Then I copied the update function across into my registrations controller:

def update
  if resource.update_with_password(params[resource_name])
    set_flash_message :notice, :updated
    sign_in resource_name, resource, :bypass => true
    redirect_to after_update_path_for(resource)
  else
    clean_up_passwords(resource)
    render_with_scope :edit
  end
end

I just don't know how to go about ensuring that devise does not need a password when editing a blank password, do I also need to remove the current_password field from the view and do this?

<% if current_user.password_required? %>
  <p><%= f.label :current_password %> <i>(we need your current password to confirm your changes)</i><br />
  <%= f.password_field :current_password %></p>
<% end %>
<p><%= f.submit "Update" %></p>

Any suggestions would be great on this as I am sure I am overlooking something but I am still new to Rails on a whole. Thanks!

Okay so I have finally figured this out!

Add the following to your class RegistrationsController < Devise::RegistrationsController

def update
  if resource.update_with_password(params[resource_name])
    set_flash_message :notice, :updated
    sign_in resource_name, resource, :bypass => true
    redirect_to after_update_path_for(resource)
  else
    clean_up_passwords(resource)
    render_with_scope :edit
  end
end

Then the following to your User model:

def update_with_password(params={})
  current_password = params.delete(:current_password) if !params[:current_password].blank?

  if params[:password].blank?
    params.delete(:password)
    params.delete(:password_confirmation) if params[:password_confirmation].blank?
  end

  result = if has_no_password?  || valid_password?(current_password)
    update_attributes(params) 
  else
    self.errors.add(:current_password, current_password.blank? ? :blank : :invalid)
    self.attributes = params
    false
  end

  clean_up_passwords
  result
end

def has_no_password?
  self.encrypted_password.blank?
end

The only thing I was slightly confused about is that in the edit view:

<% if !current_user.has_no_password? %>

I wrapped it in that if, I would have thought it would have been:

<% if current_user.has_no_password? %>

If anyone can see anything to improve my code or a different, more efficient way let me know!