如何使用file_field_tag与carrierwave

Question

我试图通过助手优化我的项目，但遇到了问题。 优化前我的 .erb 看起来像：

# app/views/object/_form.html.erb
<%= form_for(@object) do |f| %>
<%= f.label :image %>
<%= f.file_field :image %>
<%= f.submit %>
<% end %>

优化后我想看：

# app/views/object/_form.html.erb
<%= form_for(@object) do |f| %>
<%= f.labeled_image :image %>
<%= f.submit %>
<% end %>

# app/helpers/application_helper.rb
module ApplicationHelper

class ActionView::Helpers::FormBuilder
include ActionView::Helpers::FormTagHelper
include ActionView::Helpers::FormOptionsHelper
include ActionView::Helpers::AssetTagHelper
include ActionView::Helpers::FormHelper

def labeled_image (name, options = {})
  label = label_tag @object_name + "[#{name}]", I18n.t(name)
  file_field = file_field_tag @object_name + "[#{name}]"
  content_tag 'div', label+file_field
end

end

end

这段代码没有错误。此外，它生成正确的代码，但 carrierwave 不接收我发送的文件。

我只找到了这个解决方法：

# app/views/object/_form.html.erb
<%= form_for(@object) do |f| %>
<%= f.labeled_image f, :image %>
<%= f.submit %>
<% end %>

# app/helpers/application_helper.rb
module ApplicationHelper

class ActionView::Helpers::FormBuilder
include ActionView::Helpers::FormTagHelper
include ActionView::Helpers::FormOptionsHelper
include ActionView::Helpers::AssetTagHelper
include ActionView::Helpers::FormHelper

def labeled_image (f, name, options = {})
  label = label_tag @object_name + "[#{name}]", I18n.t(name)
  file_field = f.file_field name
  content_tag 'div', label+file_field
end

end

end

但看起来像菜鸟:)

Answer 1

简单

只是self.file_field name。