我想为以下表单创建一个编辑页面.问题是当用户浏览到编辑页面时,品牌名称和名称是预先填充的,但即使在“样式”中存在头像时,图像上传字段也显示“没有选择文件”.请让我知道,如果有办法补救这个.谢谢！
我的编辑形式：
<%= simple_form_for @style,:html => { :class => 'form-horizontal' },:remote => true do |m| %>
<%= m.input :brand_name,:label => 'Brand',:placeholder => 'Brand' %>
<%= m.input :name,:label => 'Style',:placeholder => 'Style' %>
<%= m.input :avatar,:label => "Image" %>
<div class="form-actions" style = "background:none">
<%= m.submit nil,:class => 'btn btn-primary' %>
<%= link_to 'Cancel',styles_path,:class => 'btn' %>
</div>
<% end %>
解决方法
昨天刚刚实施.在/ app / inputs中自定义输入
class AvatarInput < SimpleForm::Inputs::FileInput
def input
out = '' # the output string we're going to build
# check if there's an uploaded file (eg: edit mode or form not saved)
if object.send("#{attribute_name}?")
# append preview image to output
# <%= image_tag @user.avatar.url(:thumb),:class => 'thumbnail',id: 'avatar' %>
out << template.image_tag(object.send(attribute_name).url(:thumb),id: 'avatar')
end
# append file input. it will work accordingly with your simple_form wrappers
(out << @builder.file_field(attribute_name,input_html_options)).html_safe
end
end
那你可以做
<%= f.input :avatar,:as => :avatar %>