PHP Development With MongoDB

MongoSF - PHP Development With MongoDB
Presented By: Fitz Agard - LightCube Solutions LLC

April 30, 2010

Introductions - Who is this guy?
{ “name”: “Fitz Agard”,
“description”: [“Developer”,”Consultant”,”Data Junkie”, “Educator”, “Engineer”],
“location”: “New York”,
“companies”:[
{“name”: “LightCube Solutions”, “url”: “www.lightcubesolutions.com”}
],
“urls”:[
{“name”: “LinkedIn”, “url”: “http://www.linkedin.com/in/fitzagard”},
{“name”: “Twitter”, “url”: “http://www.twitter.com/fitzhagard”}
],
“email”: “fhagard@lightcube.us”
}

(If the above formatting confused you please see - http://json.org/)

Why PHP Developers Should Use MongoDB?

PHP Reasons Database Reasons
• Enhanced Development Cycle - Itʼs no longer • Document-oriented storage - JSON-style documents with dynamic
necessary to go back and forth between the Database schemas offer simplicity and power.
Schema and Object. • Full Index Support - Index on any attribute.
• Easy Ramp-Up - Queries are just an array away. • Replication & High Availability - Mirror across LANs and WANs.
• No Need For ORM - No Schema! • Auto-Sharding - Scale horizontally without compromising functionality.
• DBA? What DBA? • Querying - Rich, document-based queries.
• Arrays, Array, Arrays! • Fast In-Place Updates - Atomic modiﬁers for contention-free
performance.
• Map/Reduce - Flexible aggregation and data processing.
• GridFS - Store ﬁles of any size.

Mongo and PHP in a Nutshell
http://us.php.net/manual/en/book.mongo.php

Common Methods Conditional Operators
• ﬁnd() • $ne
• ﬁndOne() • $in
• save() • $nin
• remove() • $mod
• update() • $all
• group() • $size
• limit() • $exists
• skip() • $type
• ensureIndex() • $gt
• count() • $lt
• ...And More • $lte
• $gte

(Connectivity)
http://us2.php.net/manual/en/mongo.connecting.php

function __construct()
{
global $dbname, $dbuser, $dbpass;
$this->dbname = $dbname;
$this->dbuser = $dbuser;
$this->dbpass = $dbpass;

// Make the initial connection
try {
$this->_link = new Mongo();
// Select the DB
$this->db = $this->_link->selectDB($this->dbname);
// Authenticate
$result = $this->db->authenticate($this->dbuser, $this->dbpass);
if ($result['ok'] == 0) {
// Authentication failed.
$this->error = ($result['errmsg'] == 'auth fails') ? 'Database Authentication Failure' : $result['errmsg'];
$this->_connected = false;
} else {
$this->_connected = true;
}
} catch (Exception $e) {
$this->error = (empty($this->error)) ? 'Database Connection Error' : $this->error;
}
}

(Simple Queries)
http://us2.php.net/manual/en/mongo.queries.php

/*
* SELECT * FROM students
* WHERE isSlacker = true
* AND postalCode IN (10466,10407,10704)
* AND gradYear BETWEEN (2010 AND 2014)
* ORDER BY lastName DESC
*/
$collection = $this->db->students;
$collection->ensureIndex(array('isSlacker'=>1, 'postalCode'=>1, 'lastName'=>1, 'gradYear'=>-1));

$conditions = array('postalCode'=>array('$in'=>array(10466,10407,10704)),
'isSlacker'=>true,
'gradYear'=>array('$gt'=>2010, '$lt'=>2014));

$results = $collection->find($conditions)->sort(array('lastName'=>1));

$collection = $this->db->grades;

//SELECT count(*) FROM grades
$total = $collection->count();

//SELECT count(*) FROM grades WHERE grade = 90
$smartyPants = $collection->find(array("grade"=>90))->count();

(Using GridFS)
http://us2.php.net/manual/en/class.mongogridfs.php

$m = new Mongo();

//select Mongo Database
$db = $m->selectDB("studentsystem");

//use GridFS class for handling files
$grid = $db->getGridFS();

//Optional - capture the name of the uploaded file
$name = $_FILES['Filedata']['name'];

//load file into MongoDB and get back _id
$id = $grid->storeUpload('Filedata',$name);

//set a mongodate
$date = new MongoDate();

//Use $set to add metadata to a file
$metaData = array('$set' => array("comment"=>"This looks like a MongoDB Student", "date"=>$date));

//Just setting up search criteria
$criteria = array('_id' => $id);

//Update the document with the new info
$db->grid->update($criteria, $metaData);

(Using GridFS)

public function remove($criteria)
{
//Get the GridFS Object
$grid = $this->db->getGridFS();

//Setup some criteria to search for file
$id = new MongoID($criteria['_id']);

//Remove file
$grid->remove(array('_id'=>$id), true);

//Get lastError array
$errorArray = $db->lastError();
if ($errorArray['ok'] == 1 ) {
$retval = true;
}else{
//Send back the error message
$retval = $errorArray['err'];
}
return $retval;
}

Let’s develop a simple student information capture
system with mongoDB and PHP!

Typical Development Cycle

Design

Test Develop

Typical Design
Design

(The Schema)
Test Develop

Our Design
Design

(The Mongo Model)
Test Develop

db.students db.teachers

firstName: firstName:
lastName: lastName:
address: isCrazy:

address:
city:
state:
postalCode:
db.courses

grades:
name:
grade: isImpossible:
course: teacher:
createdDate:
modifiedDate:
comment:

schedule:
course:

sysInfo: Whiteboards aren’t this neat but they
are just as good!
username:
password:

isSlacker:

gradYear:

Some Wireframes
Design

(The View)
Test Develop

Select Course: - Select One - * Required

User Name: * Required Select Student: - Select One - * Required

Password: ***************** * Required
Grade:

First Name: * Required

Submit

Last Name: * Required

Address: * Required

City, State, Postal Code: City - State - Postal Code * Required

Click if this student is a slacker Imagine the code for this
Graduation Date: mm/dd/yyyy

Submit

Design

We’re Developing
Test Develop

public function studentUpdate()
{
$mongo_id = new MongoID($_POST['_id']);

$data = $this->cleanupData($_POST);

$this->col->update(array("_id" => $mongo_id), array('$push' => $data));

return;

}
$_POST = '4b7c29908ead0e2e1d000000';
$data = array('firstName'=>'Fitz',
'lastName'=>'Agard',
'address'=>array(
'address'=>'123 Data Lane',
'state'=>'New York',
Letʼs assume cleanupData only removes 'postalCode'=>10704
unnecessary POST elements like the _id ),
'sysInfo'=>array(
'username'=>'fhagard',
'password'=>sha1('MongoW00t')
),
'isSlacker'=>true,
'gradYear'=>2003
);

Design

We’re Developing
Test Develop

{



return;
}

$_POST = '4b7c29908ead0e2e1d000000';
$data = array('grades'=>array(
'grade'=>'3.8',
'course'=>'4bd0dd44cc93740f3e00251c',
'createDate'=>new MongoDate()));

Donʼt forget that cleanupData only removes
unnecessary POST elements like the _id

Design

Test Develop

Problem: The client called and asked why we forgot
to collect “student infractions” in our design.

oops!

“oops” - used typically to express mild apology, surprise, or dismay.

Development back to Design
Design

(“oops” is easily fixed)
Test Develop
db.students

firstName:
lastName:
address:

address:
city:
state:
postalCode: infractions:

grades: desc:
grade: date:
course:
createdDate:
modifiedDate:
comment:

schedule:
course:

sysInfo:

username:
password:
Back to the whiteboard
(or - napkin, omnigraffle, visio, etc)
isSlacker:

gradYear:

Another Wireframe
Design

(The View - Again)
Test Develop

Infraction View

Search for Student Input Search

Last Name
First Name
Graduating Year
Course

Imagine the Editor Controls A ab

new code for
Format Font Size

B i u 1
2

this.
3

Textarea enter text

Date Selector __ / __ / ____

Select a date range

Submit

Design right back to Development
Design

(The Fix! Do you see it?)
Test Develop

{



return;
}

$_POST['_id'] = '4b7c29908ead0e2e1d000000';
$data = array('infractions'=> array('desc'=>'Caught Sharding', 'date'=> new MongoDate()));

Answer: The only thing that changed was the view in the last slide.
This code is the same!

Design and Development In Summary

Our Classes/Methods/Views made the schema
NoSQL
NoORM
Arrays! Arrays! Arrays!

Design

Let’s Test
Test Develop

What does MongoDB have to do with testing?

Design

Let’s Test
Test Develop

Isn’t it a good idea to run unit tests often?

Where do you store the results?

Idea: PHPUnit to Mongo
Design

(Test Logging)
Test Develop

Test logs can
go in Mongo

Clipping from: http://www.phpunit.de/manual/current/en/logging.html#logging.json

Cursors
MongoDates
Indexes MapReduce

...Just to name a few...
Sharding
Exceptions

MongoBinData
MongoCode
MongoRegex

No more time.

Go here for more:
http://us.php.net/manual/en/book.mongo.php
http://www.mongodb.org
http://www.lightcubesolutions.com

{ “type”: “Conclusion”,
“date”: new Date('04-30-2010'),
“comments”: [“Thank You”,”Have Fun Developing”],
“location”: “San Francisco”,
“speaker”: “Fitz H. Agard”,
“contact”: “fhagard@lightcube.us”
}

PHP Development With MongoDB

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