1. Pavel Gorbach
pavel.gorbach@volcanoideas.com

2. MongoDB & Drupal 2/29
Plan
1. MySQL as standard.
2. Problems MySQL
3. Reply by MongoDB. Structure
4. Plus and Cons Mongo
5. Mongo and Drupal. Let's be friends
6. Work with users. Custom Module
7. Aggregation Framework

3. MongoDB & Drupal 3/29
MySQL as standard

4. MongoDB & Drupal 4/29
MySQL as standard
1. It is a reliable product
2. It is easy and convenient
3. A description of 90% of all possible data
storage structures *
4. It is used by millions of people *
* rough estimates

5. MongoDB & Drupal 5/29
MySQL is SLOW
node_load – SLOW
user_load – SLOW
JOIN - SLOW

6. MongoDB & Drupal 6/29
MySQL - hard structuring
The choice between
a set of tables or
columns empty
1. Slow selection
2. Waste of memory

7. MongoDB & Drupal 7/29
Reply by MongoDB
1. Very fast insert
2. No joins => Fast select
3. Power Update

8. MongoDB & Drupal 8/29
Structure MySQL

9. MongoDB & Drupal 9/29
Structure Mongo
{
name: "Jhon",
address:[
{city: "Sevastopol", country: "Ukraine"},
{city: "New York", country: "USA"}
],
friends:[
{id: 3}, {id: 13}
],
email: "mail@urk.net",
phone: "+380123456789"
}

10. MongoDB & Drupal 10/29
Mongo Plus
1. Flexibility
2. Scalability
3. Atomicity
4. Support for various
types of data
5. Object Query Language
6. Map/Reduce

11. MongoDB & Drupal 11/29
Mongo Minuses
1. Enough young product
2. Max object size - 4 Mb
3. Max DB size - 2 GB
4. Typing
5. No transaction

12. MongoDB & Drupal 12/29
Mongo and PHP
Installing from a Pecl rep
OR
Download the library from
Githab and make
Detailed documentation on PHP.net and living
examples in the test folder inside the library

13. MongoDB & Drupal 13/29
Mongo and Drupal.
Let's be friends

14. MongoDB & Drupal 14/29
Setting
#MongoDB
$conf['mongodb_connections'] = array(
'default' => array( // Connection name/alias
'host' => 'localhost', // Omit USER:PASS@
'db' => 'drup_conf' // Database name.
),
);
$conf['field_storage_default'] = 'mongodb_field_storage';

15. MongoDB & Drupal 15/29
Modules

16. MongoDB & Drupal 16/29
Update
function dc_mongodb_update($collection_name, $keys, $object,
$upsert = TRUE) {
// Select collection
$collection = mongodb_collection($collection_name);
if (!$collection || !$keys || !$object) {
return FALSE;
}
$result = $collection->update($keys, $object, array('upsert' => $upsert));
return $result;
}

17. MongoDB & Drupal 17/29
Find
function dc_mongodb_select($collection_name, $query = array(),
$fields = array(), $sort = array(), $limit = 0) {
// Select collection
$collection = mongodb_collection($collection_name);
// Set query
$mongo_result = $collection->find($query, $fields);
$mongo_result->sort($sort);
// Set limit if defined
if ($limit > 0) {
$mongo_result->limit($limit);
}
$result = array();
while($item = $mongo_result->getNext()) {
$result[] = $item;
}
return $result;
}

18. MongoDB & Drupal 18/29
Description task
Each user can be:
- name
- surname
- gender
- post
- any number of addresses
- Friends List
First and last name - required
Another fields - optional

19. MongoDB & Drupal 19/29
Structure - alone
Users
{ Address
"uid" : 5, {
"first_name" : "Jon", "uid" : 5,
"last_name" : "Smit", "address" : [ {
"gender " : "male", "country" : "USA",
"post" : "manager", "city" : "New York",
} "address" : "st Jimmy street 4 "
},
{
Friends "country" : "Great Brithan",
{ "city" : "London",
"users" : [ "address" : "Queen palace"
{ "uid" : 1 }, { "uid" : 7 } }]
] }
}

20. MongoDB & Drupal 20/29
The structure - all-inclusive
Users
{
"uid" : 5,
"first_name" : "Jon",
"last_name" : "Smit",
“gender" : "male",
"post" : "manager",
"address" : [ { "country" : "USA", ... }]
"friends" : [ {
"first_name" : "Jon",
"last_name" : "Smit",
“gender " : "male",
"post" : "manager",
"address" : [ { ... } ]
}]
}

21. MongoDB & Drupal 21/29
Structure - mixed
{
"uid" : 5,
"profile" : {
"first_name" : "Jon",
"last_name" : "Smit",
"gender" : "male",
"post" : "manager",
"address" : [ {…}, {…} ]
},
"friends" : [
{ "uid" : 1, "name" : "Bobby”},
{ "uid" : 7, "name" : "Jynu“ }
]
}

22. MongoDB & Drupal 22/29
hook_user_update
function dc_mongodb_user_user_update(&$edit, $account, $category)
{
$keys = array('uid' => (int) $account->uid);
//Get user data from mongodb
$data = dc_mongodb_select_one('users', $keys);
$userOldName = $data['profile']['first_name'] ;
//Set update data
$data['uid'] = (int) $account->uid;
$data['profile']['first_name'] = $edit['first_name'];
//Update user collection
dc_mongodb_update('users', $keys, $data);
if ($userOldName != $edit['first_name']) {
dc_mongodb_update('users', array('friends.uid' => $data['uid'] ),
array('$set' => array('friends.$.name' => $edit['first_name'])), FALSE);
}
}

23. MongoDB & Drupal 23/29
Aggregation Framework
1. Means to calculate aggregated values
without having to use map-reduce
2. Provides similar functionality to GROUP
BY and related SQL operators
3. Add computed fields
4. Create new virtual sub-objects
5. Extract sub-fields into the top-level of
results

24. MongoDB & Drupal 24/29
Aggregation wrapper
/**
* Mongo aggregate
*/
function dc_mongodb_aggregate($collection_name, $opt) {
// Select collection
$collection = mongodb_collection($collection_name);
if (!$collection) {
return FALSE;
}
$result = $collection->aggregate($opt);
unset($collection);
return $result;
}

25. MongoDB & Drupal 25/29
Extract sub-fields
$top_users = dc_mongodb_aggregate( {
„users‟, "uid" : 1,
array( "friend_name" : “Bob",
array('$unwind' => '$friends'), "frined_id" : 5
array( },
'$project' => array( ...
'uid' => 1, {
'_id' => 0, "uid" : 1,
'friend_uid' => '$friends.uid', "friend_name" : “Alex",
'friend_name' => '$friends.name', "frined_id" : 12
) }
));

26. MongoDB & Drupal 26/29
Add virtual field
{
"uid" : 1,
array( "friend_name" : “Bob",
'$project' => array( "frined_id" : 5,
"count " : 1
...
},
'count' => array( ...
'$add' => 1 {
) "uid" : 1,
) "friend_name" : “Alex",
) "frined_id" : 12,
"count" : 1
}

27. MongoDB & Drupal 27/29
Group
array( {
"_id " : {
'$group' => array(
"user_name " : “Bob",
'_id' => array( "user_id " : 5
'user_name' => '$friend_name', },
'user_id' => '$friend_uid', "count " : 3
), },
'count' => array( ...
'$sum' => '$count' {
) "_id " : {
) "user_name " : “Alex",
"user_id " : 2
),
},
"count " : 12
}

28. MongoDB & Drupal 28/29
Add sort and limit
array(
'$sort' => array( {
'count' => -1 "_id " : {
) "user_name " : “Alex",
), "user_id " : 2
array( },
$limit' => 1 "count " : 12
) }

29. MongoDB & Drupal 29/29
Questions ?
Contact:
E-mail: pavel.gorbach@volcanoideas.com
Skype: rgnrok