How to fix this error in my appsync while creating an array of data - amazon-web-services

Question

I am creating an array of date and in my resolver it only return one output of date and count audited
I search throughout the google to find some answer and I found a code how to make an array of list but the problem is it didn't return well
https://imgur.com/a/1eDknYN
this is a result and the code I use it attached in the picture
#set ($tu = 0) #set ($pc = 0) #set ($fc = 0) #set ($da = [])#set ($cda = []) #foreach($item in $ctx.result.items)
#set($tu = $item.total_audits + $tu)
#set($pc = $item.passed_compliance + $pc)
#set($fc = $item.failed_compliance + $fc)
#set($date = $item.sort)
#set($count = $item.total_audits)
$util.qr($da.add("$date"))
$util.qr($cda.add("$count"))
#end
$util.toJson({"total_audits":$tu, "passed_compliance":$pc,
"failed_compliance":$fc, "daily_audit": [{"date": $da, "count": $cda}]})
here is the error
"errors": [
{
"path": [
"getAuditSummary",
"daily_audit",
0,
"date"
],
"locations": null,
"message": "Can't serialize value (/getAuditSummary/daily_audit[0]/date) : Unable to serialize `[2018-12-26, 2018-12-27, 2018-12-28]` as a valid date."
},
{
"path": [
"getAuditSummary",
"daily_audit",
0,
"count"
],
"locations": null,
"message": "Can't serialize value (/getAuditSummary/daily_audit[0]/count) : Expected type 'Int' but was 'ArrayList'."
what i want to make is it would return something like this
"daily_audit": [
{
"date": 2018-12-26,
"count": 1
}
{
"date": 2018-12-27,
"count": 4
}
{
"date": 2018-12-28,
"count": 2
}
]

Answer 1

This is happening because $da and $cda are arrays. So it's probably returning:
"daily_audit": [
{
"date": [2018-12-26,2018-12-27,2018-12-28],
"count": [1,4,2]
}
]
So, in your response mapping template, you can try something like:
#set ($tu = 0)
#set ($pc = 0)
#set ($fc = 0)
#set ($da = [])
#foreach($item in $ctx.result.items)
#set($tu = $item.total_audits + $tu)
#set($pc = $item.passed_compliance + $pc)
#set($fc = $item.failed_compliance + $fc)
#set($date = $item.sort)
#set($count = $item.total_audits)
$util.qr($da.add({"date":$date, "count":$count}))
#end
$util.toJson({"total_audits":$tu, "passed_compliance":$pc, "failed_compliance":$fc, "daily_audit": $da})