Created
May 3, 2018 21:24
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Lambda function that connects to mongo database and increments a number
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| const { MongoClient } = require('mongodb'); | |
| const DB_URL = process.env.DB_URL || 'mongodb://localhost:27017'; | |
| const DB_NAME = 'serverless-smoothielicious'; | |
| function errorResponse(callback, err) { | |
| console.error(err); | |
| callback(null, { | |
| statusCode: 500, | |
| body: JSON.stringify({ error: err }) | |
| }) | |
| } | |
| function successResponse(callback, res) { | |
| // console.logs are useful for the debug log on netlify | |
| console.log('Saved new page request. Current count:', res.value.requests); | |
| callback(null, { | |
| statusCode: 200, | |
| body: JSON.stringify(res) | |
| }); | |
| } | |
| exports.handler = function(event, context, callback) { | |
| MongoClient.connect(`${DB_URL}/${DB_NAME}`, (err, connection) => { | |
| if (err) return errorResponse(callback, err); | |
| const db = connection.db(DB_NAME); | |
| const infoCollection = db.collection('info'); | |
| const updateAction = { $inc: { requests: 1 } }; // increment requests record by 1 | |
| const updateOptions = { | |
| projection: { _id: 0 }, | |
| upsert: true, // create record if not present | |
| returnOriginal: false // return updated value | |
| }; | |
| infoCollection.findOneAndUpdate({}, updateAction, updateOptions, (err, result) => { | |
| if (err) return errorResponse(callback, err); | |
| console.log('Saved new page request. Current count:', result.value.requests); | |
| connection.close(); | |
| callback(null, { | |
| statusCode: 200, | |
| body: JSON.stringify(result) | |
| }); | |
| }) | |
| }); | |
| } |
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