pass multiple(distinct) values to and single attribute in a iteration JMeter - performance

Question

Unable to pass multiple values in a single iteration from csv config data set
POST Body :-
[{"customerOrderId": "WS_${_RandomString(5,ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890,)}", "shipFromLocationId": "${ship_from_location}", "deliveryDate": "${expected_arrival_date}Z", "deliveryLatestDate": "${expected_arrival_date}Z", "packId": "${pack_id}", "itemId": "${item_id}", "type": "fresh", "itemDescription": "${random_text}", "quantityOrdered": "${qty_ordered}", "quantityType": "CS", "createdAt": "${current_time}Z"},
{"customerOrderId": "WS${_RandomString(5,ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890,)}", "shipFromLocationId": "${ship_from_location}", "deliveryDate": "${expected_arrival_date}Z", "deliveryLatestDate": "${expected_arrival_date}Z", "packId": "${pack_id}", "itemId": "${item_id}", "type": "fresh", "itemDescription": "${random_text}", "quantityOrdered": "${qty_ordered}", "quantityType": "CS", "createdAt": "${current_time}Z"},
{"customerOrderId": "WS${__RandomString(5,ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890,)}", "shipFromLocationId": "${ship_from_location}", "deliveryDate": "${expected_arrival_date}Z", "deliveryLatestDate": "${expected_arrival_date}Z", "packId": "${pack_id}", "itemId": "${item_id}", "type": "fresh", "itemDescription": "${random_text}", "quantityOrdered": "${qty_ordered}", "quantityType": "CS", "createdAt": "${current_time}Z"}]
CSV Data File
Column 2 is itemId , i need different itemID in a single iteration. As body contains different itemId, i need to make sure it has different item id from csv
How can I achieve this? as with csv data set config I don't see any option to achieve this

Answer 1

Given default CSV Data Set Config Sharing Mode of All Threads each virtual user will read next line from the csv file on each iteration.
If you want to read several lines within the bounds of a single iteration - you will need to consider switching to __CSVRead() function instead
Replace ${item_id} with ${__CSVRead(test.csv,1)}${__CSVRead(test.csv,next)}
[
{
"customerOrderId": "WS_${_RandomString(5,ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890,)}",
"shipFromLocationId": "${ship_from_location}",
"deliveryDate": "${expected_arrival_date}Z",
"deliveryLatestDate": "${expected_arrival_date}Z",
"packId": "${pack_id}",
"itemId": "${__CSVRead(test.csv,1)}${__CSVRead(test.csv,next)}",
"type": "fresh",
"itemDescription": "${random_text}",
"quantityOrdered": "${qty_ordered}",
"quantityType": "CS",
"createdAt": "${current_time}Z"
},
{
"customerOrderId": "WS${_RandomString(5,ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890,)}",
"shipFromLocationId": "${ship_from_location}",
"deliveryDate": "${expected_arrival_date}Z",
"deliveryLatestDate": "${expected_arrival_date}Z",
"packId": "${pack_id}",
"itemId": "${__CSVRead(test.csv,1)}${__CSVRead(test.csv,next)}",
"type": "fresh",
"itemDescription": "${random_text}",
"quantityOrdered": "${qty_ordered}",
"quantityType": "CS",
"createdAt": "${current_time}Z"
},
{
"customerOrderId": "WS${__RandomString(5,ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890,)}",
"shipFromLocationId": "${ship_from_location}",
"deliveryDate": "${expected_arrival_date}Z",
"deliveryLatestDate": "${expected_arrival_date}Z",
"packId": "${pack_id}",
"itemId": "${__CSVRead(test.csv,1)}${__CSVRead(test.csv,next)}",
"type": "fresh",
"itemDescription": "${random_text}",
"quantityOrdered": "${qty_ordered}",
"quantityType": "CS",
"createdAt": "${current_time}Z"
}
]
again, replace test.csv with either relative or full path to your CSV file.