| var getID = function (result) { | |
| return result.id; | |
| }; | |
| var db = new PouchDB('test'); | |
| return db.post({things: [1, 2, 3]}) | |
| .then(getID) | |
| .then(function (id) { | |
| return db.get(id); | |
| }); |
The new Cloudant query API is pretty awesome. It basically looks like Mongo, which makes for much more readable and user-friendly queries than what you can get with standard map/reduce.
Index the field foo:
cinnabar:~ nolan$ acurl -X POST https://pouch.cloudant.com/mydb/_index -d '{
> "index": {
> "fields": ["foo"]
> },
| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes"> | |
| <style> | |
| .sidebyside { | |
| display:inline-block; | |
| max-width: 200px; | |
| margin: 0 30px 20px 30px; |
Quick post-mortem on this, since I think it's interesting. :)
The idea itself was excellent. By hooking into the Level* ecosystem, we got a number of different backends for free*: in-memory (both client and server), localStorage, RiakDOWN, SqlDOWN, etc.
We never did replace the IndexedDB and WebSQL adapters, though. Part of that was probably a self-fulfilling prophesy on my part, because I went to extreme lengths to get both adapters passing on Safari, IE, Android, iOS, PhantomJS, and now even the Cordova SQLite Plugin on both iOS and back to Android 2.3. Then I performance-tuned the hell out of them.
So now I think we're invested enough in idb.js and websql.js, and the performance is tuned so tightly to those specific APIs, that switching to level.js/WebDOWN/SqlDOWN would be too big a cost to bear in terms of performance (level.js is currently 2x slower). And we'd get little gain in developer efficiency, since our implementations are pretty rock-solid by now. In fact I think PouchDB may be at the forefro
| <html> | |
| <body> | |
| <script src="//cdnjs.cloudflare.com/ajax/libs/pouchdb/2.2.3/pouchdb.min.js"></script> | |
| <script src="index.js"></script> | |
| </body> | |
| </html> |
| 300340 pouchdb-new.js | |
| 134486 pouchdb-new.min.js | |
| 40975 pouchdb-new.min.js.gz | |
| 264669 pouchdb.js | |
| 113529 pouchdb.min.js | |
| 35341 pouchdb.min.js.gz |
| <html> | |
| <body> | |
| <script src="//cdnjs.cloudflare.com/ajax/libs/pouchdb/2.2.3/pouchdb.min.js"></script> | |
| <script src="index.js"></script> | |
| <button onclick="edit()">Edit</button> | |
| </body> | |
| </html> |
| var PouchDB = require('pouchdb'); | |
| var NUM_DOCS = 1000; | |
| var dbName = 'after'; | |
| //var dbName = 'before'; | |
| var pouch = new PouchDB(dbName + '_' + NUM_DOCS); | |
| var text = |
| <html> | |
| <head> | |
| <title> | |
| PouchDB nightly build | |
| </title> | |
| <style> | |
| html { | |
| font-family: Helvetica, Arial, sans-serif; | |
| margin: 0 10px; | |
| } |
| // with promises | |
| pouch.get('id').then(null, function (err) { | |
| if (err.code === 404) { | |
| // not found | |
| return {}; // default doc | |
| } | |
| throw err; | |
| }).then(function (doc) { | |
| doc.value = 'some new value'; | |
| return pouch.put(doc); |