AWS script for batch deleting data out of dynamodb using dynamoose

aws-dynamo-batch-delete.js

#!/usr/bin/env node
const dynamoose = require('dynamoose');

dynamoose.setDefaults({create: false });


let schema = new dynamoose.Schema({
        key: {
            type: String,
            required: true,
            hashKey: true
            },
        range: {
            type: String,
            required: true,
            rangeKey: true
            },

        other: String
    },{
        useNativeBooleans: true
    });

var model = dynamoose.model('mytablename', 
                            schema,
                            {
                                create: false,
                                update: false,
                                waitForActive: false,
                                waitForActiveTimeout: 3000
                            });


function deleteAll(list) {
    list = list.map(x => {return {"key": x.key, "range": x.range};});
    return new Promise((resolve, reject) => {
        model
        .batchDelete(
            list
            , (error) => {
                if (error)
                    reject(error);
                else{
                    resolve();
                    console.log("Batch Delete complete")
                }
                    
            }
        )
    });
}

function scan() {
    return new Promise ((resolve, reject) => {
        
        Target
        .scan()
        .limit(200)
        .exec((err, data)=>{
            console.log(`error:${err}`);
            console.log(`count:${data.length}`);
            if (!err)
                resolve(data);
            else
                reject(err);
        });
    });
}


try {
    while(true)
    {
        console.log("RunId Query");
        let result = await scan();
        console.log(JSON.stringify(result.map(x => {return {"runId": x.runId};})));

        if (result.length == 0) {
            console.log("DoneZo!!");
            return;
        }
        result = await deleteAll(result);
    }
} catch (error) {
    console.log(error);
}