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mongodb.ts
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mongodb.ts
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import { MongoClient } from 'mongodb'
if (!process.env.MONGODB_URI) {
throw new Error('Invalid environment variable: "MONGODB_URI"')
}
const uri = process.env.MONGODB_URI
const options = {}
let client
let clientPromise: Promise<MongoClient>
if (!process.env.MONGODB_URI) {
throw new Error('Please add your Mongo URI to .env.local')
}
if (process.env.NODE_ENV === 'development') {
// In development mode, use a global variable so that the value
// is preserved across module reloads caused by HMR (Hot Module Replacement).
if (!global._mongoClientPromise) {
client = new MongoClient(uri, options)
global._mongoClientPromise = client.connect()
}
clientPromise = global._mongoClientPromise
} else {
// In production mode, it's best to not use a global variable.
client = new MongoClient(uri, options)
clientPromise = client.connect()
}
// Export a module-scoped MongoClient promise. By doing this in a
// separate module, the client can be shared across functions.
export default clientPromise