DynamoDB UpdateItem Action

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

It provides a way to update Item in DynamoDB. Before adding DynamoDB UpdateItem Action, user has to define a . User need to provide following parameters to add DynamoDB UpdateItem Action.

TableName

User's DynamoDB Tablename

Function

JavaScript code to update "DynamoDB Item".
"payload" object and "params" object is available in this code. params object should hold key-value data pairs as mentioned in . "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.

ConditionExpression

User can provide a condition expression here. Check for more information.

UpdateExpression

User can provide a update expression here. Check for more information.

key

User can provide a primary key here. Check for more information.

ExpressionAttributeValues

ExpressionAttributeNames

//"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 change the name value to "pqr" of id having value 2.

#b = :id_val                    //Condition Expression
set #a = :x                     //Update Expression
{"id":"2"}                      //key
{ ":x":"pqr" , ":id_val":"2" }  //ExpressionAttributeValues
{ "#a" : "name","#b":"id" }     //ExpressionAttributeNames

Please note the following points:

"payload" object is supplied from Action Trigger like Rules, Action Command etc.
Data Response of UpdateItem will be available as Action Response.

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Last updated 3 years ago

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