Having hard time to extract day of week in scripted field

Elastic Stack Kibana
1

I am able to extract hour of day using the below script format. But facing the issue while extracting the day of week because of timezone.

I used this script.

["","Mon","Tue","Wed","Thu","Fri","Sat","Sun"]doc['event_time'].value.dayOfWeek

You can see the July 23 extract Fri and Thu as a day of week.

image
image1322×145 6.44 KB

So please guide how to resolve this issue? Thank you

Continuing the discussion from Hour Scripted Field:

2

This is done in Painless Lab so will need to change for a scripted field.

# Get the date and store in ZonedDateTime variable.
ZonedDateTime zdt = ZonedDateTime.parse(params.date_field);

# Set the pattern which is day of week. See documentation below.
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("E");

# Extract the day of the week and save as a string.
String day_of_week = zdt.format(formatter);

# Output the day of week.
return day_of_week;

Input
"date_field": "2021-06-12T09:28:48+00:00"

Output
Sat

Documentation

3

how to do in scripted field ?

4

The below should work. Just replace with your field name. The only thing that changes is where you are getting the data from.

# Get the date and store in ZonedDateTime variable.
ZonedDateTime zdt = ZonedDateTime.parse(doc['YOUR-FIELD-NAME'].value);

# Set the pattern which is day of week. See documentation below.
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("E");

# Extract the day of the week and save as a string.
String day_of_week = zdt.format(formatter);

# Output the day of week.
return day_of_week;
5

I am getting this error.

{
 "root_cause": [
  {
   "type": "script_exception",
   "reason": "runtime error",
   "script_stack": [
    "java.base/java.lang.Class.cast(Class.java:3818)",
    "zdt = ZonedDateTime.parse(doc['fm_data.event_time'].value);\nDateTimeFormatter ",
    "                                                   ^---- HERE"
   ],
   "script": "ZonedDateTime zdt = ZonedDateTime.parse(doc['fm_data.event_time'].value); ...",
   "lang": "painless",
   "position": {
    "offset": 65,
    "start": 14,
    "end": 92
   }
  }
 ],
 "type": "search_phase_execution_exception",
 "reason": "all shards failed",
 "phase": "query",
 "grouped": true,
 "failed_shards": [
  {
   "shard": 0,
   "index": "4g-radio-fm",
   "node": "n-2CcZomQIWiklu2KWP19g",
   "reason": {
    "type": "script_exception",
    "reason": "runtime error",
    "script_stack": [
     "java.base/java.lang.Class.cast(Class.java:3818)",
     "zdt = ZonedDateTime.parse(doc['fm_data.event_time'].value);\nDateTimeFormatter ",
     "                                                   ^---- HERE"
    ],
    "script": "ZonedDateTime zdt = ZonedDateTime.parse(doc['fm_data.event_time'].value); ...",
    "lang": "painless",
    "position": {
     "offset": 65,
     "start": 14,
     "end": 92
    },
    "caused_by": {
     "type": "class_cast_exception",
     "reason": "Cannot cast org.elasticsearch.script.JodaCompatibleZonedDateTime to java.lang.CharSequence"
    }
   }
  }
 ]
}
6

I tried to use this script. This script is given in the documentation.

LocalDateTime.ofInstant(Instant.ofEpochMilli(doc['fm_data.event_time'].value), ZoneId.of('Asia/Kolkata')).getDayOfWeek().getDisplayName(TextStyle.FULL, Locale.getDefault())

Here also I am getting the error. Please see the error below.

{
 "root_cause": [
  {
   "type": "script_exception",
   "reason": "runtime error",
   "script_stack": [
    "LocalDateTime.ofInstant(Instant.ofEpochMilli(doc['fm_data.event_time'].value), ZoneId.of('Asia/Kolkata')).getDayOfWeek().getDisplayName(TextStyle.FULL, Locale.getDefault())\n\n",
    "                                                                      ^---- HERE"
   ],
   "script": " ...",
   "lang": "painless",
   "position": {
    "offset": 71,
    "start": 1,
    "end": 175
   }
  }
 ],
 "type": "search_phase_execution_exception",
 "reason": "all shards failed",
 "phase": "query",
 "grouped": true,
 "failed_shards": [
  {
   "shard": 0,
   "index": "4g-radio-fm",
   "node": "n-2CcZomQIWiklu2KWP19g",
   "reason": {
    "type": "script_exception",
    "reason": "runtime error",
    "script_stack": [
     "LocalDateTime.ofInstant(Instant.ofEpochMilli(doc['fm_data.event_time'].value), ZoneId.of('Asia/Kolkata')).getDayOfWeek().getDisplayName(TextStyle.FULL, Locale.getDefault())\n\n",
     "                                                                      ^---- HERE"
    ],
    "script": " ...",
    "lang": "painless",
    "position": {
     "offset": 71,
     "start": 1,
     "end": 175
    },
    "caused_by": {
     "type": "wrong_method_type_exception",
     "reason": "cannot convert MethodHandle(Dates)JodaCompatibleZonedDateTime to (Object)long"
    }
   }
  }
 ]
}
7

I am able to figure out the solution. This script is perfectly working for me

LocalDateTime.ofInstant(Instant.ofEpochMilli(doc['event_time'].value.millis), ZoneId.of('Asia/Kolkata')).getDayOfWeek().getDisplayName(TextStyle.SHORT, Locale.getDefault())

Thanks