Created
July 22, 2019 09:41
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AppSync Resolver PutItem with Condition Prevent Data Overwrite
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| { | |
| "version" : "2017-02-28", | |
| "operation" : "PutItem", | |
| "key" : { | |
| "shopID": $util.dynamodb.toDynamoDBJson($ctx.args.shopID), | |
| "vendorID": $util.dynamodb.toDynamoDBJson($ctx.args.vendorID) | |
| }, | |
| "attributeValues": { | |
| "name": $util.dynamodb.toDynamoDBJson($ctx.args.name) | |
| }, | |
| ## ADD NEW ITEM IF SHOP ID AND VENDOR ID NOT YET EXIST | |
| "condition": { | |
| "expression": "attribute_not_exists(shopID) AND attribute_not_exists(vendorID)" | |
| } | |
| } |
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Perfect. That's exactly what I've been looking for! Thanks a lot