{ 
  "table":"cust",
  "layout":"form",
  "onecolumn":true,
  "caption": "File Upload - DB Optimized",
  "fields": [
    {"name":"cust_id", "key":1,"caption":"ID"},
    {"name":"cust_doc","type":"file","control":"file_upload","caption":"Client Document",
      "controlparams": { 
        "data_folder": "tutorials_cust_doc",
        "sqlparams": {
          "file_size":   "cust_doc_size",
          "file_extension":    "cust_doc_ext",
          "file_name":   "cust_doc_filename",
          "file_upload_user":     "cust_doc_upuser",
          "file_upload_timestamp": "cust_doc_uptstmp"
        }
      }
    },
   {"name":"cust_doc_filename","sqlselect":"cust_id||cust_doc_ext","control":"hidden"}
  ]
}