I am trying to figure out how to insert dynamic data into a dynamodb table via an API Gateway in AWS. Currently I have a dynamodb table and an API endpoint setup that accepts a POST like so.
POST https://{unique-id}.execute-api.us.east-1.amazonaws.com/notification/events
{
"reference_number": 99,
"purchase_date": "1/1/2017"
}
I've setup a body mapping template in the API gateway to massage the data into the dynamodb.
{
"TableName": "Events",
"Item": {
"reference_number": {
"N": "$input.path('$.reference_number')"
},
"purchase_date": {
"S": "$input.path('$.purchase_date')"
}
}
}
The above works and saves to the table.
Suppose I add the event hash to my json (which can change based on events).
{
"reference_number": 99,
"purchase_date": "1/1/2017",
"event": {
"name": "purchase",
"items": [1,3,6],
"info": {
"currencyID": "USD",
"countryID": "US"
}
}
}
How do I save the event attribute to a Map in dynamodb using the API Gateway Body mapping template syntax?
{
"TableName": "Events",
"Item": {
"reference_number": {
"N": "$input.path('$.reference_number')"
},
"purchase_date": {
"S": "$input.path('$.purchase_date')"
},
"event":{
"M": "$input.path('$.event')"
}
}
}
The above template gives me the following error. "Expected map or null"
"event": { "M": "$input.json('$.event')" }
? - Khalid T.