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我有一个与附件表有多态关联的文章模型。Rails accept_nested_attributes_for多态强参数
在新的文章表单中,我要求用户能够上传附件。
该代码的作品不是强烈的参数,因为我不知道如何将这个多态关系的强参数放在什么位置。
Attachment
=> Attachment(id: integer, file: string, attachable_id: integer, attachable_type: string, created_at: datetime, updated_at: datetime)
嵌套形式是:
<div class="uploader pull-left" >
<%= f.fields_for :attachments do |builder| %>
<%= builder.file_field :file, :multiple => true, accept: 'image/jpeg,image/gif,image/png', name: "discussion_attachments[attachment][]" %>
<% end %>
</div>
params哈希表如下:
{"utf8"=>"✓", "authenticity_token"=>"m84LL1D05LCsivXuASukGgcDoVhTvxhVuDThv9Q2iDRS/AMOeMvQArc0mpMZJSsW887R2krWu85Xm1v9+WQ8bQ==", "article"=>{"content"=>""}, "attachments"=>{"file"=>[#<ActionDispatch::Http::UploadedFile:0x007f0918ffb720 @tempfile=#<Tempfile:/tmp/RackMultipart20150810-3911-1rsq9lz.JPG>, @original_filename="YourPhoto_0001.JPG", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"attachments[file][]\"; filename=\"YourPhoto_0001.JPG\"\r\nContent-Type: image/jpeg\r\n">, #<ActionDispatch::Http::UploadedFile:0x007f0918ffb338 @tempfile=#<Tempfile:/tmp/RackMultipart20150810-3911-i1ztf2.JPG>, @original_filename="YourPhoto_0002.JPG", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"attachments[file][]\"; filename=\"YourPhoto_0002.JPG\"\r\nContent-Type: image/jpeg\r\n">]}, "commit"=>"Submit", "controller"=>"articles", "action"=>"create"}
这将有助于将这一行'accep_nested_attributes_for:attachments'添加到文章模型。并在article_params中使用它:'params.require(:article).permit(:content,attachments_attributes:[attachment:[]])' – Athar