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The JavaScript JSON Cookbook

You're reading from   The JavaScript JSON Cookbook Over 80 recipes to make the most of JSON in your desktop, server, web, and mobile applications

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Product type Paperback
Published in Jun 2015
Publisher
ISBN-13 9781785286902
Length 192 pages
Edition 1st Edition
Languages
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Toc

Table of Contents (12) Chapters Close

Preface 1. Reading and Writing JSON on the Client FREE CHAPTER 2. Reading and Writing JSON on the Server 3. Using JSON in Simple AJAX Applications 4. Using JSON in AJAX Applications with jQuery and AngularJS 5. Using JSON with MongoDB 6. Using JSON with CouchDB 7. Using JSON in a Type-safe Manner 8. Using JSON for Binary Data Transfer 9. Querying JSON with JSONPath and LINQ 10. JSON on Mobile Platforms Index

Creating a document in CouchDB using Node.js and Cradle

The Cradle module provides the save method to save a new document to the database. You pass the document to save and a callback to invoke when the operation completes or fails.

How to do it...

Here's how to save a simple record using save:

var item =  {
  call: 'kf6gpe-7',
  lat: 37,
  lng: -122
};

db.save(item, function (error, result) {
  if (error) {
    console.log(error);
    // Handle error
  } else {
    var id = result.id;
    var rev = result.rev;
    }
  });

How it works…

The save method returns a JavaScript object to your callback with fields for the newly created document IDs and an internal revision number, along with a field titled ok, which should be true. As you'll see in the recipe titled Updating a Record in CouchDB with Node.js, you need both the revision of a document you store and the ID in order to update it; otherwise, you end up creating a new document or receiving a failure to save the...

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