I'm trying to perform a PutItem action against dynamoDB table with itemID as Primary partition key and createdAt as Primary sort key, with a condition like follows:
{
"TableName": "ShoppingBasket",
"Item": {
"itemID": {
"N": "7456473"
},
"createdAt": {
"S": "2001-02-03T04:05:06Z"
}
},
"ConditionExpression": "contains(createdAt, :created_at)",
"ExpressionAttributeValues": {
":created_at": {"S": "Z"}
}
}
The expression is there to ensure that ISO8601 UTC time is provided for the createdAt attribute. However it gives me: ConditionalCheckFailedException: The conditional request failed
What am I doing wrong?
Using contains on items that do not exist yet will always evaluate to false. Instead, please perform input validation on the client side before calling PutItem, checking that createdAt is of the correct form.
Related
So, i am trying to filter objects inside of an array using dynamo db.
This is my sample object
client: {
"name":"etc"
"subscriptions": [
{
"status": "canceled"
... other fields
},
{
"status": "active"
... other fields
}
]
}
I am using filter expressions and dynamoose scan method, what i want to achieve in this case would be the scan bring me back all subscriptions that have the canceled status, is this possible using dynamodb and this kind of objects?.
var filter = {
FilterExpression: "#subscriptions.#status = :statusValue",
ExpressionAttributeNames: {
"#subscriptions":"subscriptions",
"#status": "status"
},
ExpressionAttributeValues:{
":statusValue": "canceled"
}
};
dynamooseEntity.scan(filter).exec();
When using the Firestore REST API to order and filter results, I am unable to use a cursor/reference value for the startAt value. I feel this may be possible, seeing it is provided in examples of Firestore's cursor-based pagination is detailed in their SDK: https://firebase.google.com/docs/firestore/query-data/query-cursors
I have a query that uses orderBy on a integer field within a document. I can successfully start at a specific integer value for this query, like so:
"structuredQuery": {
"from": [
{
"collectionId": "objects"
}
],
"orderBy": [
{
"field": {
"fieldPath": "counter"
},
"direction": "DESCENDING"
}
],
"startAt": {
"values": [
{
"integerValue": 15
}
]
}
}
I'm hoping to benefit from cursor pagination, but unfortunately if I change the startAt value to referenceValue, the query results do not reflect this, even though the query is successfully performed.
"startAt": {
"values": [
{
"referenceValue": "projects/.../databases/(default)/documents/objects/OjvmBvvQ9TkyyQiJ4ExJ"
}
]
}
Am I missing something in the way this works differently to the SDK examples?
Note that it's not a document reference but a document snapshot that you can use as a query cursor. A snapshot includes the field values needed for startAt. The SDKs take a document snapshot, extract the field values, and pass those values to startAt.
You can see the Node.js client library doing this here in createCursor and extractFieldValues.
I am able to fetch the record from dynamo db and view the response successfully. I need to modify the fetched 'ACCOUNTNAME' attribute in the 'items' array and update the json and also update in dynamo db. Now when I try to update the fetched records I end up with the Invalid attribute value type exception.
I was trying to update it using the key with Array of Strings which is provided with code snippet also tried to update inside for loop using the individual string but both failed with same exception as
"statusCode": 400,
"body": {
"message": "Invalid attribute value type",
"error": {
"errorMessage": "ValidationException"
}
}
I tried to create params and update the call inside the for loop by setting the key as below,
Key: {
"UUID": {
"S": usersOfAccountFromDB.body.Items[key].UUID
}
,
"TYPE": {
"S": user
}
}
but also failed with the same exception.
Fetched Json from dynamo db
[
{
"DEFINITION": "914ba44a-8c26-4b60-af0f-96b6aa37efe6",
"UUID": "830a49cb-4ed3-41ae-b111-56714a71ab98",
"TYPE": "USER",
"RELATION": "01efd131-6a5d-4068-889e-9dba44262da5",
"ACCOUNTNAME": "Wolff LLC"
},
{
"DEFINITION": "1f60fded-323d-40e1-a7f8-e2d053b0bed0",
"UUID": "47db3bbe-53ac-4e58-a378-f42331141997",
"TYPE": "USER",
"RELATION": "01efd131-6a5d-4068-889e-9dba44262da5",
"ACCOUNTNAME": "Wolff LLC"
},
{
"DEFINITION": "05ddccba-2b6d-46bd-9db4-7b897ebe16ca",
"UUID": "e7290457-db77-48fc-bd1a-7056bfce8fab",
"TYPE": "USER",
"RELATION": "01efd131-6a5d-4068-889e-9dba44262da5",
"ACCOUNTNAME": "Wolff LLC"
},
.
.
.
.]
Now I tried to iterate the Json and setup UUID which is the key as the String array as below,
var userUUIDArray : string[] = [];
for (let key in usersOfAccountFromDB.body.Items) {
userUUIDArray.push(usersOfAccountFromDB.body.Items[key].UUID);
}
for (var uuid of userUUIDArray) {
console.log("UUID : " +uuid); // prints all the uuid
}
// Creating a parameter for the update dynamo db
var params = {
TableName: <tableName>,
Key: {
"UUID": {
"SS": userUUIDArray
}
,
"TYPE": {
"S": user
}
},
UpdateExpression: 'SET #ACCOUNTNAME = :val1',
ExpressionAttributeNames: {
'#ACCOUNTNAME': 'ACCOUNTNAME' //COLUMN NAME
},
ExpressionAttributeValues: {
':val1': newAccountName
},
ReturnValues: 'UPDATED_NEW',
};
//call the update of dynamodb
const result = await this.getDocClient().update(param).promise();
I get the error as below,
"body": {
"message": "Invalid attribute value type",
"error": {
"errorMessage": "ValidationException"
}
}
All the approaches failed with same above exception
The update operation which your code currently uses only allow a single item to be updated.
IIUC, you want to update multiple items with one API call. For this you need to use batchWrite operation. Keep in mind that you cannot update more than 25 items per invocation.
The origin of the error you are getting
Your code fails due to the use of "SS" in the UUID field. This field is of type string so you must use "S". Note however that since you're using the document client API you do not need to pass values using this notation. See this answer for further details.
I have resolved the issue now by running the update statement one by one using loop
for (let key in usersOfAccountFromDB.body.Items) {
var updateParam = {
TableName: process.env.AWS_DYNAMO_TABLE,
Key: {
UUID: usersOfAccountFromDB.body.Items[key].UUID,
TYPE: user
},
UpdateExpression: "SET #ACCOUNTNAME = :val1",
ExpressionAttributeNames: {
'#ACCOUNTNAME': 'ACCOUNTNAME'
},
ExpressionAttributeValues: {
":val1": newAccountName
},
ReturnValues: "UPDATED_NEW",
};
const result = await this.getDocClient().update(updateParam).promise();
}
I have a table that has uid has its primary key. Given an array of uid values, I need to be able to query all the items in the table whose uid matches any of the supplied uid values.
This is what I tried (an example with 3 uids to look up):
{
"TableName": "my_table",
"KeyConditionExpression": "uid IN (:entry_0,:entry_1,:entry_2)",
"ExpressionAttributeValues": {
":entry_0": {
"S": "4e77576f-f92c-449d-8729-070b7568b349"
},
":entry_1": {
"S": "7f9edaf4-be64-49d4-a6b5-f18f7dce7c79"
},
":entry_2": {
"S": "eca6134e-aad5-473c-83c3-9b4fda554588"
}
}
}
However, when I try this, I get the following error:
Invalid operator used in KeyConditionExpression: IN
Can anyone spot the error?
Use a batchGet query here:
https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_BatchGetItem.html
You can send multiple ids and any no of ids will still return in about 20-30ms for primary key queries.
I have an user table, which consists of email, phone etc., and I would like to query a record based on its email or phone value (instead of #Id). Having not-adequate knowledge to do this - I wrote a schema like this:
type Query {
...
getUser(id: ID!): User
getUserByEmail(input: GetUserByEmailInput!): User
...
}
input GetUserByEmailInput {
email: String!
}
In resolver against getUserByEmail(..), I tried to experiment but nothing worked so far, so its remain to default state:
So when I ran a query like this to the Queries console:
query GetUserByEmail {
getUserByEmail(input: {email: "email#email.com"}) {
id
name
email
image
}
}
this returns an error like this:
{
"data": {
"getUserByEmail": null
},
"errors": [
{
"path": [
"getUserByEmail"
],
"data": null,
"errorType": "DynamoDB:AmazonDynamoDBException",
"errorInfo": null,
"locations": [
{
"line": 41,
"column": 5,
"sourceName": null
}
],
"message": "The provided key element does not match the schema (Service: AmazonDynamoDBv2; Status Code: 400; Error Code: ValidationException; Request ID: xxx)"
}
]
}
How can I query a record by non-Id field value?
If you use the Create Resources flow in the console, it will create a listUsers query that looks like the following for example. Note that the DynamoDb operation will be a Scan that has a DynamoDb filter expression where you can use any field to query DynamoDb. See below for the mapping template.
{
"version": "2017-02-28",
"operation": "Scan",
"filter": #if($context.args.filter) $util.transform.toDynamoDBFilterExpression($ctx.args.filter) #else null #end,
"limit": $util.defaultIfNull($ctx.args.limit, 20),
"nextToken": $util.toJson($util.defaultIfNullOrEmpty($ctx.args.nextToken, null)),
}
You can find more details about Scans and filter expressions in the AWS AppSync documentation:
https://docs.aws.amazon.com/appsync/latest/devguide/tutorial-dynamodb-resolvers.html