我正在尝试为我的Rails应用程序的所有文件和图像制作一般文件上传器 . 上传器功能与流行的JS上传器相同,例如Filestack或Uppy Uploader,用户只需在浏览器上选择任何文件,然后应用程序将处理文件并在文件上传后返回文件的URL . 现在,通过这个URL,我们可以将它附加到任何形式/ WYSIWYG编辑器/我们喜欢的地方,如聊天消息等 .
为此,我的方法是使用Rails Active Storage进行手动上载 .
首先,我创建一个名为Uploader的类,它链接到Rails Active Storage:
app/models/uploader.rb
class Uploader < ApplicationRecord
has_one_attached :file
end
然后,我使用名为“file”的操作为此Uploader创建了一个Controller,其中将处理所有文件:
config/routes.rb
post 'uploaders/file' => 'uploaders#file'
app/controllers/uploaders_controller.rb
def file
blob = ActiveStorage::Blob.create_after_upload!(
io: params[:uploader][:file],
filename: params[:uploader][:file].original_filename,
content_type: params[:uploader][:file].content_type
)
@filelink = url_for(blob)
respond_to do |format|
format.html { redirect_back(fallback_location: root_path) }
format.js
end
end
最后,这是这个Uploader的视图:
app/views/new.html.erb
<h3>Select Files To Upload</h3>
<%= form_for @uploader, url: uploaders_file_path(@uploader), remote: true do |f| %>
<%= f.file_field :file, direct_upload: true, class: "form-control" %>
<%= f.button type: "submit", id: "submit-uploader", class: "btn btn-primary btn-md", data: {disable_with: "Uploading..."} do %>
Save
<% end %>
<% end %>
QUESTION
所以,我的问题是如何在上面的代码中使用JSON,以便我可以获取上传的文件URL?
首先,我已将上述代码更改为:
app/controllers/uploaders_controller.rb
def file
blob = ActiveStorage::Blob.create_after_upload!(
io: params[:uploader][:file],
filename: params[:uploader][:file].original_filename,
content_type: params[:uploader][:file].content_type
)
render json: { filelink: url_for(blob) }
end
app/views/new.html.erb
<%= form_for @uploader, url: uploaders_file_path(@uploader), remote: true, :html => {:'data-type' => 'json', :multipart => true} do |f| %>
<%= f.file_field :file, direct_upload: true, class: "form-control" %>
<%= f.button type: "submit", id: "submit-uploader", class: "btn btn-primary btn-md", data: {disable_with: "Uploading..."} do %>
Save
<% end %>
<% end %>
<script type="text/javascript">
$("#submit-uploader").click(function(e){
e.preventDefault();
$.ajax({
type: "POST",
dataType: "script",
url: $(this).parents("form").attr("action"),
contentType: 'application/json',
data: JSON.stringify({ file: $("#uploader_file"), _method: 'post' })
}).done(function( data ){
console.log(data);
});
});
</script>
现在,我使用javascript通过JSON提交活动存储表单 . 但显然缺少一些东西,因为脚本目前还没有处理任何活动存储 . 那么,我该如何解决这个问题呢?
谢谢!
1 回答
你可以用ajax发送文件,这里是 example :