GetTask.js

console.log('Loading function');
var AWS = require('aws-sdk');
AWS.config.region = 'ap-northeast-1';
var db = new AWS.DynamoDB();

exports.handler = function(event, context) {
    console.log(event);
    var ddbRequest = null;

    var formatOutput = function(data) {
        var output = [];
        
        for ( var i = 0; i < data.Items.length; i++ ) {
            var item = data.Items[i];
            output.push({
                'id' : item.id.N,
                'title' : item.title.S,
                'description' : item.description.S,
                'done' : item.done.BOOL,
                'createdAt' : item.createdAt.S,
                'updatedAt' : item.updatedAt.S
            });
        }
        
        return output;
    }
    
    console.log("hogehogehofoo")
    console.log(event.id)
    if (event.id !== null) {
        console.log("here......")
        var params = {
            TableName : 'Tasks',
            KeyConditions :  {
                "id" : {
                    "AttributeValueList" : [
                        {
                            "N" : String(event.id)
                        }
                    ],
                    "ComparisonOperator" : "EQ"
                }
            }
        }
        ddbRequest = db.query(params, function(err, data) {
            err && console.log(err);
            console.log('query');
            context.succeed(formatOutput(data)); 
        });
    } else {
        console.log("request fail");
        context.fail("required id is null");
    }
    ddbRequest.send();
};