ruby-on-rails - 设计 - 如果数据库中不存在电子邮件，则忘记密码不会显示错误消息

Question

当用户点击忘记密码时，系统会将他们带到忘记密码页面，其中有一个字段供他们输入电子邮件地址。如果他们的电子邮件地址在数据库中，一切都很好，但如果数据库中不存在电子邮件地址，它只会重定向到同一页面，但不会显示错误消息。

如何让错误消息出现？

/view/devise/passwords/new.html.erb

...
<%= form_for(resource, :as => resource_name, :url => password_path(resource_name), :html => { :method => :post }) do |f| %>
    <h1>Reset Password</h1>     

    <div class="login-fields">

        <p>Instructions on resetting your password will be emailed to you.</p>

        <%= render :partial => '/shared/messages' %>

        <div class="field">
            <%= f.label :email %>
            <%= f.email_field :email, :placeholder => 'Email', :class => 'login username-field' %>
        </div> <!-- /field -->

    </div> <!-- /login-fields -->

    <div class="login-actions">

        <%= content_tag(:button, :type=>:submit, :class => "button btn btn-secondary btn-large") do %>
            Send me reset password instructions
        <% end %>

    </div> <!-- .actions -->

    <div class="login-social">
        <%= render "devise/shared/links" %>
    </div>

<% end %>
...

/views/shared/_messages.html.erb

<% if alert || flash[:alert] || flash[:error] %>
    <div class="alert alert-error">
        <a class="close" data-dismiss="alert" href="#">x</a>
        <h4 class="alert-heading">Error!</h4>
        <%= alert %>
        <%= flash[:error] %>
    </div>
<% end %>

<% if flash[:success] || notice || flash[:notice]%>
    <div class="alert alert-success">
        <a class="close" data-dismiss="alert" href="#">x</a>
        <h4 class="alert-heading">Success!</h4>
        <%= flash[:success] %>
        <%= notice %>
    </div>
<% end %>

Answer 1

在您的部分共享消息中，您仅显示来自 Controller 的错误。您需要包括附加到您的模型的错误。在这种情况下，错误消息附加到用户模型。你/views/shared/_messages.html.erb 实际上应该是这样的:

<% if alert || flash[:alert] || flash[:error] %>
    <div class="alert alert-error">
      <a class="close" data-dismiss="alert" href="#">x</a>
      <h4 class="alert-heading">Error!</h4>
      <%= alert %>
      <%= flash[:error] %>
    </div>
<% end %>
<% if model.errors.any? %>
    <div class="alert alert-error">
      <a class="close" data-dismiss="alert" href="#">x</a>
      <h4 class="alert-heading">Error!</h4>
      <ul>
        <% model.errors.full_messages.each do |msg| %>
            <li>* <%= msg %></li>
        <% end %>
      </ul>
    </div>
<% end %>
<% if flash[:success] || notice || flash[:notice]%>
    <div class="alert alert-success">
      <a class="close" data-dismiss="alert" href="#">x</a>
      <h4 class="alert-heading">Success!</h4>
      <%= flash[:success] %>
      <%= notice %>
    </div>
<% end %>

在渲染部分时，您需要传入模型。

<%= render '/shared/messages', model: resource %>