How to set a field in Logstash to "not_analyzed" using the Logstash config file

I have an elasticsearch index that I use to index a collection of documents.

These documents are originally in csv format and I am viewing them using logstash.

My Logstash config file.

    input {
        file {
                path => "/csv_files_for_logstash/app1lg.csv"
                        type => "core2"
                        start_position => "beginning"
        }   }


    filter {
        csv {
                separator => ","
                        columns=> ["Date","Package Name","App Version Code","Current Device Installs","Daily Device Installs","Daily Device Uninstalls","Daily Device Upgrades","Current User Installs","Total User Installs","Daily User Installs","Daily User Uninstalls"]
        }
        mutate {convert => ["App Version Code", "string"]}
        mutate {convert => ["Current Device Installs", "float"]}
        mutate {convert => ["Daily Device Installs", "float"]}
        mutate {convert => ["Daily Device Uninstalls", "float"]}
        mutate {convert => ["Current User Installs", "float"]}
        mutate {convert => ["Total User Installs", "float"]}
        mutate {convert => ["Daily User Installs", "float"]}
        mutate {convert => ["Daily User Uninstalls", "float"]}
        ruby {
                code => '
                  b = event["App Version Code"]
                  string2=""
                  for counter in (3..(b.size-1))
                         if counter == 4
                                 string2+= "."+ b[counter]
                         elsif counter ==  6
                                string2+= "("+b[counter]
                         elsif counter == 8
                                string2+= b[counter] + ")"
                         else
                                 string2+= b[counter]
                         end

                   end

                   event["App Version Code"] = string2

                  '

        }
}
   output {
        elasticsearch {
                embedded => true
                        action => "index"
                        host => "es"
                        index => "fivetry"
                        workers => 1

        }
        stdout{
                codec => rubydebug {
                }
        }
}

      

        
        
        
      

    

Now my field value (app version code) looks like "123456789" in the csv which I parse to "4.56 (789)" using Ruby code.

This term breaks it down into different meanings as it is not analyzed.

I know there is another way to create a mapping and set it to not_ananlysed, but I don’t know how. So,

Is there a way to set this not_analysed using just my logstash config file?

Besides,

The .raw field does not appear in Kibana, with which I can use the exact string.

Thanks and regards,