2

我正在使用一个具有非常特定布局的主题，并且我想为您的 Rails 表单提供一种故障安全方式。

我有一个布局app/views/shared/forms/fields/_layout.html.erb

<div class="js-form-message mb-4">
  <div class="js-focus-state input-group u-form">
    <div class="input-group g-brd-primary--focus">
      <%= yield(:field) %>
    </div>
  </div>
</div>

我有两个部分。第一部分：app/views/shared/forms/fields/_email.html.erb

<% form = locals[:form] %>
<% locals[:required] = locals[:required].nil? ? true : locals[:required] %>
<% locals[:placeholder] = locals[:placeholder] || t('forms.shared.email.placeholder') %>


<%= render layout: "shared/forms/fields/layout", locals: locals do %>
  <% content_for(:field) do %>
    <%= form.email_field :email, 
      placeholder: locals[:placeholder], 
      class: "form-control g-py-15 g-px-15",
      "data-error-class"=>"u-has-error-v1-3",
      "data-success-class"=>"u-has-success-v1-2",
      "data-msg-email" => t('forms.shared.email.validate'),
      "data-msg" => t('forms.shared.required'),
      autofocus: locals[:autofocus],
      required: locals[:required] %>  
  <% end %>
<% end %>

第二部分：app/views/shared/forms/fields/_login.html.erb

<% form = locals[:form] %>
<% locals[:required] = locals[:required].nil? ? true : locals[:required] %>
<% locals[:placeholder] = locals[:placeholder] || t('forms.shared.login.placeholder') %>


<%= render layout: "shared/forms/fields/layout", locals: locals do %>
  <% content_for(:field) do %>
    <%= form.email_field :login, 
      placeholder: locals[:placeholder], 
      class: "form-control g-py-15 g-px-15",
      "data-error-class"=>"u-has-error-v1-3",
      "data-success-class"=>"u-has-success-v1-2",
      "data-msg" => t('forms.shared.required'),
      autofocus: locals[:autofocus],
      required: locals[:required] %>  
  <% end %>
<% end %>

当我这样做时：

<%= render "shared/forms/fields/email", locals: {form: f} %>

<%= render "shared/forms/fields/login", locals: {form: f} %>

我明白了

Email Field

Email Field/Login Field

我发现content_for“附加”了你给它的块，然后当我yield返回整个块时。

第一次没有任何东西content_for(:field)，它附加到它Email Field。但第二次它并没有清除它的内容，只是附加Login Field到它上面。

我正在考虑增加额外的复杂性，layout.html.erb所以仅仅保持内联不是一种选择。

有没有办法告诉布局只产生 content_for 的“最新”值。

编辑：

我写了一个在 yield 后刷新的方法，建议将再次使用相同的密钥：

def yield_and_flush!(content_key)
  view_flow.content.delete(content_key)
end
4

2 回答 2

2

content_for可以flush选择重置以前的内容：

<% content_for :field, flush: true do %>
   new content here
<% end %>
于 2019-11-12T15:21:08.283 回答
0

解决方案是编写一个yield_and_flush!方法。我在这里看到了解决方案

def yield_and_flush!(content_key)
  view_flow.content.delete(content_key)
end
于 2019-11-12T15:44:25.513 回答