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Reusable DynamoDb Function to Update Multiple Fields at Once
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import { DateTime } from "luxon"; | |
import { | |
AttributeValue, | |
DynamoDBClient, | |
QueryCommand, | |
UpdateItemCommand, | |
} from "@aws-sdk/client-dynamodb"; | |
const dynamoDBClient = new DynamoDBClient({}); | |
interface UserFields { | |
[key: string]: string | boolean | number; | |
} | |
export const updateUserFields = async ( | |
userId: string, | |
fields: UserFields | |
): Promise<boolean> => { | |
const currentDateTime = DateTime.now(); | |
const now = currentDateTime.toFormat("MM/dd/yy hh:mm:ss a"); | |
const userTable = "users"; | |
try { | |
// Construct update expression | |
const updateExpressions = []; | |
Object.keys(fields).forEach((field: string) => { | |
updateExpressions.push(`#${field} = :${field}`); | |
}); | |
updateExpressions.push("#updated_at = :updated_at"); | |
const updateExpression = "SET " + updateExpressions.join(", "); | |
const expressionAttributeNames: Record<string, string> = {}; | |
const expressionAttributeValues: Record<string, AttributeValue> = {}; | |
// Construction attribute names and values | |
Object.keys(fields).forEach((field: string) => { | |
const value = fields[field]; | |
const namePlaceholder = `#${field}`; | |
const valuePlaceholder = `:${field}`; | |
expressionAttributeNames[namePlaceholder] = field; | |
if (typeof value === "boolean") { | |
expressionAttributeValues[valuePlaceholder] = { BOOL: value }; | |
} else if (typeof value === "number") { | |
expressionAttributeValues[valuePlaceholder] = { N: value.toString() }; | |
} else if (typeof value === "string") { | |
expressionAttributeValues[valuePlaceholder] = { S: value }; | |
} | |
// Add support for other data types... | |
}); | |
expressionAttributeNames["#updated_at"] = "updated_at"; | |
expressionAttributeValues[":updated_at"] = { S: now }; | |
const updateCommand = new UpdateItemCommand({ | |
TableName: userMetadataTableName, | |
Key: { user_id: { S: userId } }, | |
UpdateExpression: updateExpression, | |
ExpressionAttributeNames: expressionAttributeNames, | |
ExpressionAttributeValues: expressionAttributeValues, | |
}); | |
await dynamoDBClient.send(updateCommand); | |
return true; | |
} catch (error: any) { | |
// Your own error handling here... | |
} | |
}; |
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