'Dynamodb scan on array of objects Filter Expression
I want to scan dynamodb using filter on product_id showing in below json of table. Can anybody explain how to do scanning using filter of product_id. Wants to scan dynamodb table data using documentclient. Wants to find all fields which has product_id: something
{
"mandi_id": 1,
"product": [
{
"updated_price": 24,
"product_id": 2,
"last_price": 23
},
{
"updated_price": 24,
"product_id": 5,
"last_price": 23
}
],
"status": "active",
"createdAt": "2022-04-21T08:23:41.774Z",
"mandiCloseTime": "4pm",
"mandi_description": "anaj mandi",
"mandi_name": "gaziabad anaj mandi",
"state": "uttar pradesh",
"city": "gaziabad",
"main_image_s3": "",
"mandi_latlong": {
"lng": 77.48325609999999,
"lat": 28.680346
},
"mandiOpenTime": "10am",
"updatedAt": "2022-04-21T08:23:41.774Z",
"address_name": "gavindpuram",
"landmark_name": "mandi",
"village": "gaziabad",
"postal": "201013"
}
I have tried the following set of code but it is returning empty array list
var params = {
TableName: "dev-agrowave-mandi-management",
// Select: "ALL_ATTRIBUTES"
FilterExpression: "contains(#product,:product)",
ExpressionAttributeNames: {
"#product": "product",
},
ExpressionAttributeValues: { ":product": {"product_id":parseInt(id)}
}
};
let lastEvaluatedKey = 'dummy'; // string must not be empty
const itemsAll = [];
while (lastEvaluatedKey) {
const data = await docClient.scan(params).promise();
itemsAll.push(...data.Items);
lastEvaluatedKey = data.LastEvaluatedKey;
if (lastEvaluatedKey) {
params['ExclusiveStartKey'] = lastEvaluatedKey;
}
}
return {msg:itemsAll,params:params};
Sources
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Source: Stack Overflow
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