Created
August 26, 2016 15:33
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Migrate Mongo -> Firebase
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/** | |
* Migrate MongoDB database to Firebase. | |
* Syntax: node migrate.js [-c || --collection=]<MongoDB Collection> [ [-h || --host=]<MongoDB URI>] | |
* If no args are provided, the MONGODB_URI | |
* env variable declared in the .env file | |
* will be used instead. | |
*/ | |
const env = require('dotenv'); | |
const firebase = require('firebase'); | |
const execSync = require('child_process').execSync; | |
const minimist = require('minimist'); | |
const readline = require('readline'); | |
const fs = require('fs'); | |
const args = minimist(process.argv.slice(2)); | |
env.config({ silent: true }); | |
var collection = args.c || args.collection; | |
// Parse MongoDB URI - if none is provided, get the environment URI instead | |
var mongoURI = args.h || args.host || process.env.MONGODB_URI; | |
// Remove mongo protocol from URI | |
mongoURI = mongoURI.substr(10); | |
// Separate data from URI - split on "@", "/" (escaped) and ":" (also escaped) | |
var mongoData = mongoURI.split(/[@\/\:]/); | |
// Convert mongoData to object/dictionary | |
var keys = ["user", "password", "uri", "port", "database"]; | |
keys.forEach((keys, i) => { | |
mongoData[keys] = mongoData[0]; | |
mongoData.shift(); // Removing number-indexed values | |
}); | |
var command = "mongoexport -h " + mongoData.uri + ":" + mongoData.port + | |
" -d " + mongoData.database + " -u " + mongoData.user + | |
" -p " + mongoData.password + " -c " + collection + " -o backup.json"; | |
console.log("=>", command); | |
// Run mongoexport -h <uri>:<port> -u <username> -p <password> -d <database> -c <collection> | |
var child = execSync(command); | |
var backup = []; | |
var lines = fs.readFileSync('backup.json').toString().split('\n'); | |
lines.pop(); // If last element length is lesser than 1, pop from array | |
// Assign parsed JSON to backup var | |
lines.forEach(line => { | |
backup.push(JSON.parse(line)); | |
}); | |
// Remove _id field, convert data objects to string if they are objects | |
backup = backup.map(item => { | |
delete item._id; | |
if (typeof item.endDateTime === "object") { | |
item.endDateTime = item.endDateTime["$date"]; | |
} | |
if (typeof item.createDate === "object") { | |
item.createDate = item.createDate["$date"]; | |
} | |
if (typeof item.updateDate === "object") { | |
item.updateDate = item.updateDate["$date"]; | |
} | |
return item; | |
}); | |
// Initialize Firebase | |
var config = { | |
apiKey: process.env.FIREBASE_API_KEY, | |
authDomain: process.env.FIREBASE_AUTH_DOMAIN, | |
databaseURL: process.env.FIREBASE_DATABASE_URL, | |
storageBucket: process.env.FIREBASE_STORAGE_BUCKET | |
}; | |
const firebaseApp = firebase.initializeApp(config); | |
// Initialize database | |
const database = firebaseApp.database().ref().child(collection); | |
var promises = []; | |
// Insert backup data | |
backup.forEach(row => { | |
promises.push(database.push(row)); | |
}); | |
Promise.all(promises).then(() => { | |
process.exit(1); | |
}); |
I would also like to know if it still works today, please and urgently if you please.
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Is this still working in 2019?