Logstash Extract Elasticsearch Nested Fields

Elastic Stack Logstash
13

I also tried below :

  1. specifying "[appEvents][0][attribute_num][filesPendingForUpload]" 
input {
  elasticsearch {
    hosts => "10.10.101.1:9200"
    size => 10000
    index => "backupindex"
  }
}



output {
  csv {
    fields => ["userId", "timeStamp", "[backupSettings][backgroundUploading]", "[backupSettings][connectionType]", "[backupSettings][contactBackup]", "[backupSettings][contactPermission]", "[backupSettings][photoBackup]", "[backupSettings][photoQuality]", "[backupSettings][storagePermission]", "[backupSettings][videoBackup]", "[appEvents][0][attribute_num][filesPendingForUpload]"]
    path => "/tmp/exp.csv"
  }
}
  1. specifying "[appEvents][attribute_num][filesPendingForUpload]"

Both did not helped me ... IN CSV , field was blank.