ActiveRecord::RecordNotFound in KetquagiaiquyetsController#download_file

Couldn't find Ketquagiaiquyet with 'id'=18

Extracted source (around line #21):
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def download_file
@model = Ketquagiaiquyet.find(params[:id])
@model.increment!(:soluong_download)
send_file(@model.file.path,
:filename => File.basename(@model.file_url),

Rails.root: /app

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Request

Parameters:

{"id"=>"18"}

Response

Headers:

None