serverless and connections mongodb atlas
const mongoose = require('mongoose');
mongoose.Promise = global.Promise;
let isConnected;
module.exports = connectToDatabase = () => {
if (isConnected) {
console.log('=> using existing database connection');
return Promise.resolve();
}
console.log('=> using new database connection');
return mongoose.connect(process.env.DB)
.then(db => {
isConnected = db.connections[0].readyState;
});
};
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