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mongo_trial.js
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mongo_trial.js
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var MongoClient = require('mongodb').MongoClient
, assert = require('assert');
// Connection URL
var dbs = "myproject";
var url = 'mongodb://localhost:27017/';
// Use connect method to connect to the server
MongoClient.connect(url, function(err, db) {
assert.equal(null, err);
console.log("Connected correctly to server");
var dbo = db.db(dbs);
insertDocuments(dbo, function() {
findAllDocuments(dbo, function() {
findDocuments(dbo, function() {
db.close();
})
});
});
});
var insertDocuments = function(db, callback) {
// Get the documents collection
var collection = db.collection('documents');
// Insert some documents
collection.insertMany([
{a : 1}, {a : 2}, {a : 3}
], function(err, result) {
assert.equal(err, null);
assert.equal(3, result.result.n);
assert.equal(3, result.ops.length);
console.log("Inserted 3 documents into the collection");
callback(result);
});
}
var findAllDocuments = function(db, callback) {
// Get the documents collection
var collection = db.collection('documents');
// Find some documents
collection.find({}).toArray(function(err, docs) {
assert.equal(err, null);
console.log("Found the following records");
console.log(docs)
callback(docs);
});
}
var findDocuments = function(db, callback) {
// Get the documents collection
var collection = db.collection('documents');
// Find some documents
collection.find({'a': 3}).toArray(function(err, docs) {
assert.equal(err, null);
console.log("Found the following records");
console.log(docs);
callback(docs);
});
}