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The JavaScript JSON Cookbook

The JavaScript JSON Cookbook

By : Ray Rischpater
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The JavaScript JSON Cookbook

The JavaScript JSON Cookbook

1 (2)
By: Ray Rischpater

Overview of this book

If you're writing applications that move structured data from one place to another, this book is for you. This is especially true if you've been using XML to do the job because it's entirely possible that you could do much of the same work with less code and less data overhead in JSON. While the book's chapters make some distinction between the client and server sides of an application, it doesn't matter if you're a frontend, backend, or full-stack developer. The principles behind using JSON apply to both the client and the server, and in fact, developers who understand both sides of the equation generally craft the best applications.
Table of Contents (12 chapters)
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11
Index

Searching for a document in MongoDB with Node.js

Being able to insert documents wouldn't do you much good if you didn't have a way to search for documents. MongoDB lets you specify a template on which to match, and returns objects matching that template.

As with insertions and updates, you'll work with a collection of documents, invoking the collection's find method.

How to do it...

Here's an example that finds all documents in the test collection with a call of kf6gpe-7 and prints them to the console:

var mongo = require('mongodb').MongoClient;

var url = 'mongodb://localhost:27017/test';

mongo.connect(url, function(error, db) {
  console.log("mongo.connect returned " + error);

  var cursor = collection.find({call: 'kf6gpe-7'});
  cursor.toArray(function(error, documents) {
    console.log(documents);

    db.close();
  });
});

How it works…

After connecting to the database, we invoke find in the collection, which returns...

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