DynamoDB Query Action

Execute DynamoDB query completely serverless via Thingsup IoT Platform. Create custom query from MQTT Rules Engine or HTTP APIs.

It provides a way to perform a query on DynamoDB. Before adding DynamoDB Query Action, user has to define a AWS Connection. User need to provide following parameters to add DynamoDB Query Action.

TableName

User's DynamoDB Tablename

Function

  • JavaScript code to Query "DynamoDB".

  • "payload" object and "params" object is available in this code. params object should hold key-value data pairs as mentioned in AWS Doc. "payload" object is supplied from Action Trigger like Rules, Action Command etc.

  • Any params passed through Function will override parameters passed through form.

Connection ID

Connection ID of AWS Connection.

Limit

User can set limit here.

KeyConditionExpression

User can provide a KeyConditionExpression here. Check AWS Doc for more information.

ExpressionAttributeValues

User can provide a ExpressionAttributeValues here. Check AWS Doc for more information.

ExpressionAttributeNames

User can provide a ExpressionAttributeNames here. Check AWS Doc for more information.

FilterExpression

User can provide a FilterExpression here. Check AWS Doc for more information.

ProjectionExpression

User can provide a ProjectionExpression here. Check AWS Doc for more information.

//Example 1
//Let "id" and "name" are the column names inside DynamoDB table.
//It contains a entry having id=2 and name="abc"
//Following are the fields you need mention in form to get the entries from table id having value 2.
‚Äč
#a = :id_val //KeyConditionExpression
{"#a":"id" } //ExpressionAttributeNames
{":id_val":2} //ExpressionAttributeValues
Add DynamoDB Query Action

Please note the following points:

  • "payload" object is supplied from Action Trigger like Rules, Action Command etc.

  • Data Response of Query will be available as Action Response.