SlideShare a Scribd company logo

Leveraging the Power of Graph Databases in PHP

Jeremy Kendall, profile picture
Jeremy Kendall

The document discusses leveraging graph databases in PHP applications. It provides an overview of graph databases, their data model consisting of nodes, properties and relationships. It then demonstrates connecting to Neo4j from PHP using the Neo4jPHP wrapper, querying the graph database with Cypher, and modeling a news feed content structure as a graph of connected content nodes. Sample code is shown for adding new content nodes to a user's news feed graph through a LASTPOST relationship.

Technology
1 of 97
Downloaded 17 times
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
Leveraging the Power of Graph Databases in PHP Jeremy Kendall Nashville PHP November 2014
Obligatory Intro Slide
Also - New Father
What Kind of Database?
Graphs != Charts https://www.flickr.com/photos/markgroves/3065192499/
Graphs != Charts http://stephenwildish.tumblr.com/post/101408321763/friday-project-witch-moral-compass
Graph Databases
Graph Databases • Data Model! • Nodes with properties • Typed relationships
Graph Databases • Data Model! • Nodes with properties • Typed relationships • Strengths! • Highly connected data • ACID
Graph Databases • Data Model! • Nodes with properties • Typed relationships • Strengths! • Highly connected data • ACID • Weaknesses! • Paradigm shift
Graph Databases • Data Model! • Nodes with properties • Typed relationships • Strengths! • Highly connected data • ACID • Weaknesses! • Paradigm shift • Examples! • Neo4j, Titan, OrientDB
Why Care?
Why Care? • All the NoSQL Joy • Schema-less • Semi-structured data
Why Care? • All the NoSQL Joy • Schema-less • Semi-structured data • Escape from JOIN Hell
Why Care? • All the NoSQL Joy • Schema-less • Semi-structured data • Escape from JOIN Hell • Speed
Why Care?
Why Care? • Relationships have 1st class status
Why Care? • Relationships have 1st class status • Just as important as the objects connecting them
Why Care? • Relationships have 1st class status • Just as important as the objects connecting them • You can have properties & labels
Why Care? • Relationships have 1st class status • Just as important as the objects connecting them • You can have properties & labels • Multiple relationships
Why Care?
Speed Depth MySQL Query Time Neo4j Query Time Records Returned 2 0.028 (28 MS) 0.04 ~900 3 0.213 0.06 ~999 4 10.273 0.07 ~999 5 92.613 0.07 ~999 1,000 people with an average 50 friends each
Crazy Speed Depth MySQL Query Time Neo4j Query Time Records Returned 2 0.016 (16 MS) 0.01 ~2500 3 30.27 0.168 ~125,000 4 1543.505 1.359 ~600,000 5 Stopped after 1 hour 2.132 ~800,000 1,000,000 people with an average 50 friends each
Neo4j + Cypher
Cypher • Neo4j’s declarative query language • Easy to pick up • Some clauses and concepts familiar from SQL
Simple Example
Goal
Create Some Nodes CREATE (jk:Person { name: "Jeremy Kendall" })! CREATE (gs:Company { name: "Graph Story" })! ! CREATE (tn:State { name: "Tennessee" })! CREATE (memphis:City { name: "Memphis" })! CREATE (nashville:City { name: "Nashville" })! ! CREATE (hotchicken:Food { name: "Hot Chicken" })! CREATE (bbq:Food { name: "Barbecue" })! CREATE (photography:Hobby { name: "Photography" })! CREATE (language:Language { name: "PHP" })! ! // . . . snip . . .!
Create Some Relationships // . . . snip . . .! ! CREATE (jk)-[:WORKS_AT { title: {"CTO"}]->(gs),! (jk)-[:LIVES_IN]->(memphis)-[:LIVED_IN]->(nashville),! (hotchicken)-[:ONLY_IN]->(nashville),! (bbq)-[:ONLY_IN]->(memphis),! (jk)-[:LOVES]->(hotchicken),! ! // . . . snip . . .!
Create Some Relationships // . . . snip . . .! ! CREATE (jk)-[:WORKS_AT { title: {"CTO"}]->(gs),! (jk)-[:LIVES_IN]->(memphis)-[:LIVED_IN]->(nashville),! (hotchicken)-[:ONLY_IN]->(nashville),! (bbq)-[:ONLY_IN]->(memphis),! (jk)-[:LOVES]->(hotchicken),! ! // . . . snip . . .!
Create Some Relationships // . . . snip . . .! ! CREATE (jk)-[:WORKS_AT { title: {"CTO"}]->(gs),! (jk)-[:LIVES_IN]->(memphis)-[:LIVED_IN]->(nashville),! (hotchicken)-[:ONLY_IN]->(nashville),! (bbq)-[:ONLY_IN]->(memphis),! (jk)-[:LOVES]->(hotchicken),! ! // . . . snip . . .!
Create Some Relationships // . . . snip . . .! ! CREATE (jk)-[:WORKS_AT { title: {"CTO"}]->(gs),! (jk)-[:LIVES_IN]->(memphis)-[:LIVED_IN]->(nashville),! (hotchicken)-[:ONLY_IN]->(nashville),! (bbq)-[:ONLY_IN]->(memphis),! (jk)-[:LOVES]->(hotchicken),! ! // . . . snip . . .!
Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
Query Result
Neo4j + PHP
Neo4jPHP • PHP wrapper for the Neo4j REST API • Installable via Composer • Used internally at Graph Story • Used in this presentation • Well tested • https://packagist.org/packages/everyman/ neo4jphp
Also see: NeoClient • Written by Neoxygen • Alternative PHP wrapper for the Neo4j REST API • Installable via Composer • Under review for internal use at Graph Story • Well tested • https://packagist.org/packages/neoxygen/neoclient
Connecting $neo4jClient = new EverymanNeo4jClient(! ‘yourgraph.example.com’, ! 7473! );! ! $neo4jClient->getTransport()! ->setAuth('username', 'password')! ->getTransport()->useHttps();
Creating a Node and Label $node = new Node($neo4jClient);! ! $label = $neo4jClient->makeLabel('Person');! ! $node->setProperty('name', ‘Jeremy Kendall');! ! $node->save()->addLabels(array($label));
Searching // Searching for a label by property! $label = $neo4jClient->makeLabel('Person');! $nodes = $label->getNodes('name', $name);
Querying (Cypher) $queryString = ! 'MATCH (p:Person { name: { name }}) RETURN p';! ! $query = new EverymanNeo4jCypherQuery(! $neo4jClient,! $queryString,! ['name' => ‘Jeremy Kendall']! );! ! $result = $query->getResultSet();
Named Parameters
Named Parameters $queryString = ! 'MATCH (p:Person { name: { name }}) RETURN p';! ! $query = new EverymanNeo4jCypherQuery(! $neo4jClient,! $queryString,! ['name' => ‘Jeremy Kendall']! );! ! $result = $query->getResultSet();
Named Parameters $queryString = ! 'MATCH (p:Person { name: { name }}) RETURN p';! ! $query = new EverymanNeo4jCypherQuery(! $neo4jClient,! $queryString,! ['name' => ‘Jeremy Kendall']! );! ! $result = $query->getResultSet();
Content Modeling: News Feeds
News Feed • Modeled as a list of posts • Newest post first • All subsequent posts follow • Relationships: LASTPOST and NEXTPOST
LASTPOST
NEXTPOST
The Content Model class Content! {! public $node;! public $nodeId;! public $contentId;! public $title;! public $url;! public $tagstr;! public $timestamp;! public $userNameForPost;! public $owner = false;! }
Adding Content public static function add($username, Content $content)! {! $queryString =<<<CYPHER! MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url:{url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner! CYPHER;! ! $query = new Query(! Neo4jClient::client(),! $queryString,! array(! 'u' => $username,! 'title' => $content->title,! 'url' => $content->url,! 'tagstr' => $content->tagstr,! 'timestamp' => time(),! 'contentId' => uniqid()! )! );! $result = $query->getResultSet();! ! return self::returnMappedContent($result);! }
Adding Content public static function add($username, Content $content)! {! $queryString =<<<CYPHER! MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url:{url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner! CYPHER;! ! $query = new Query(! Neo4jClient::client(),! $queryString,! array(! 'u' => $username,! 'title' => $content->title,! 'url' => $content->url,! 'tagstr' => $content->tagstr,! 'timestamp' => time(),! 'contentId' => uniqid()! )! );! $result = $query->getResultSet();! ! return self::returnMappedContent($result);! }
Adding Content public static function add($username, Content $content)! {! $queryString =<<<CYPHER! MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url:{url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner! CYPHER;! ! $query = new Query(! Neo4jClient::client(),! $queryString,! array(! 'u' => $username,! 'title' => $content->title,! 'url' => $content->url,! 'tagstr' => $content->tagstr,! 'timestamp' => time(),! 'contentId' => uniqid()! )! );! $result = $query->getResultSet();! ! return self::returnMappedContent($result);! }
Adding Content MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url: {url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner
Adding Content MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url: {url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner
Adding Content MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url: {url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner
Adding Content MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url: {url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner
Adding Content MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url: {url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner
Adding Content MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url: {url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner
Adding Content $query = new Query(! $neo4jClient,! $queryString,! array(! 'u' => $username,! 'title' => $content->title,! 'url' => $content->url,! 'tagstr' => $content->tagstr,! 'timestamp' => time(),! 'contentId' => uniqid()! )! );! ! $result = $query->getResultSet();
Retrieving Content public static function getContent($username, $skip)! {! $queryString = <<<CYPHER! MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4! CYPHER;! ! $query = new Query(! Neo4jClient::client(),! $queryString,! array(! 'u' => $username,! 'skip' => $skip,! )! );! ! $result = $query->getResultSet();! ! return self::returnMappedContent($result);! }
Retrieving Content MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4
Retrieving Content MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4
Retrieving Content MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4
Retrieving Content MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4
Retrieving Content MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4
Retrieving Content MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4
Editing Content public static function edit(Content $content)! {! $updatedAt = time();! ! $node = $content->node;! $node->setProperty('title', $content->title);! $node->setProperty('url', $content->url);! $node->setProperty('tagstr', $content->tagstr);! $node->setProperty('updated', $updatedAt);! $node->save();! ! $content->updated = $updatedAt;! ! return $content;! }
Editing Content public static function edit(Content $content)! {! $updatedAt = time();! ! $node = $content->node;! $node->setProperty('title', $content->title);! $node->setProperty('url', $content->url);! $node->setProperty('tagstr', $content->tagstr);! $node->setProperty('updated', $updatedAt);! $node->save();! ! $content->updated = $updatedAt;! ! return $content;! }
Editing Content public static function edit(Content $content)! {! $updatedAt = time();! ! $node = $content->node;! $node->setProperty('title', $content->title);! $node->setProperty('url', $content->url);! $node->setProperty('tagstr', $content->tagstr);! $node->setProperty('updated', $updatedAt);! $node->save();! ! $content->updated = $updatedAt;! ! return $content;! }
Editing Content public static function edit(Content $content)! {! $updatedAt = time();! ! $node = $content->node;! $node->setProperty('title', $content->title);! $node->setProperty('url', $content->url);! $node->setProperty('tagstr', $content->tagstr);! $node->setProperty('updated', $updatedAt);! $node->save();! ! $content->updated = $updatedAt;! ! return $content;! }
Editing Content public static function edit(Content $content)! {! $updatedAt = time();! ! $node = $content->node;! $node->setProperty('title', $content->title);! $node->setProperty('url', $content->url);! $node->setProperty('tagstr', $content->tagstr);! $node->setProperty('updated', $updatedAt);! $node->save();! ! $content->updated = $updatedAt;! ! return $content;! }
Deleting Content public static function delete($username, $contentId)! {! $queryString = self::getDeleteQueryString(! $username, ! $contentId! );! ! $params = array(! 'username' => $username,! 'contentId' => $contentId,! );! ! $query = new Query(! $neo4jClient,! $queryString, ! $params! );! $query->getResultSet();! }
Deleting Content public static function delete($username, $contentId)! {! $queryString = self::getDeleteQueryString(! $username, ! $contentId! );! ! $params = array(! 'username' => $username,! 'contentId' => $contentId,! );! ! $query = new Query(! $neo4jClient,! $queryString, ! $params! );! $query->getResultSet();! }
Deleting Content public static function delete($username, $contentId)! {! $queryString = self::getDeleteQueryString(! $username, ! $contentId! );! ! $params = array(! 'username' => $username,! 'contentId' => $contentId,! );! ! $query = new Query(! $neo4jClient,! $queryString, ! $params! );! $query->getResultSet();! }
Deleting Content public static function delete($username, $contentId)! {! $queryString = self::getDeleteQueryString(! $username, ! $contentId! );! ! $params = array(! 'username' => $username,! 'contentId' => $contentId,! );! ! $query = new Query(! $neo4jClient,! $queryString, ! $params! );! $query->getResultSet();! }
Deleting Content: Leaf // If leaf! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(c:Content { contentId: { contentId }})! WITH c! MATCH (c)-[r]-()! DELETE c, r
Deleting Content: Leaf // If leaf! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(c:Content { contentId: { contentId }})! WITH c! MATCH (c)-[r]-()! DELETE c, r
Deleting Content: Leaf // If leaf! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(c:Content { contentId: { contentId }})! WITH c! MATCH (c)-[r]-()! DELETE c, r
Deleting Content: Leaf // If leaf! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(c:Content { contentId: { contentId }})! WITH c! MATCH (c)-[r]-()! DELETE c, r
Deleting Content: Leaf // If leaf! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(c:Content { contentId: { contentId }})! WITH c! MATCH (c)-[r]-()! DELETE c, r
Deleting Content: LASTPOST // If last! MATCH (u:User { username: { username }})-[lp:LASTPOST]- >(del:Content { contentId: { contentId }})-[np:NEXTPOST]- >(nextPost)! CREATE UNIQUE (u)-[:LASTPOST]->(nextPost)! DELETE lp, del, np
Deleting Content: LASTPOST // If last! MATCH (u:User { username: { username }})-[lp:LASTPOST]- >(del:Content { contentId: { contentId }})-[np:NEXTPOST]- >(nextPost)! CREATE UNIQUE (u)-[:LASTPOST]->(nextPost)! DELETE lp, del, np
Deleting Content: LASTPOST // If last! MATCH (u:User { username: { username }})-[lp:LASTPOST]- >(del:Content { contentId: { contentId }})-[np:NEXTPOST]- >(nextPost)! CREATE UNIQUE (u)-[:LASTPOST]->(nextPost)! DELETE lp, del, np
Deleting Content: LASTPOST // If last! MATCH (u:User { username: { username }})-[lp:LASTPOST]- >(del:Content { contentId: { contentId }})-[np:NEXTPOST]- >(nextPost)! CREATE UNIQUE (u)-[:LASTPOST]->(nextPost)! DELETE lp, del, np
Deleting Content: Other // All other! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(before),! (before)-[delBefore]->(del:Content { contentId: { contentId }})-[delAfter]->(after)! CREATE UNIQUE (before)-[:NEXTPOST]->(after)! DELETE del, delBefore, delAfter
Deleting Content: Other // All other! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(before),! (before)-[delBefore]->(del:Content { contentId: { contentId }})-[delAfter]->(after)! CREATE UNIQUE (before)-[:NEXTPOST]->(after)! DELETE del, delBefore, delAfter
Deleting Content: Other // All other! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(before),! (before)-[delBefore]->(del:Content { contentId: { contentId }})-[delAfter]->(after)! CREATE UNIQUE (before)-[:NEXTPOST]->(after)! DELETE del, delBefore, delAfter
Deleting Content: Other // All other! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(before),! (before)-[delBefore]->(del:Content { contentId: { contentId }})-[delAfter]->(after)! CREATE UNIQUE (before)-[:NEXTPOST]->(after)! DELETE del, delBefore, delAfter
Deleting Content: Other // All other! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(before),! (before)-[delBefore]->(del:Content { contentId: { contentId }})-[delAfter]->(after)! CREATE UNIQUE (before)-[:NEXTPOST]->(after)! DELETE del, delBefore, delAfter
Questions?
Thanks! ! jeremy.kendall@graphstory.com @JeremyKendall http://www.graphstory.com

More Related Content

ODP
Php 102: Out with the Bad, In with the Good
Jeremy Kendall
 
PDF
Assetic (OSCON)
Kris Wallsmith
 
PDF
The jQuery Divide
Rebecca Murphey
 
PDF
NoSQL & MongoDB
Shuai Liu
 
KEY
Potential Friend Finder
Richard Schneeman
 
PDF
The effective use of Django ORM
Yaroslav Muravskyi
 
PPTX
PHP 1
Mohammed Abutabikh
 
PDF
NoSQL を Ruby で実践するための n 個の方法
Tomohiro Nishimura
 
Php 102: Out with the Bad, In with the Good
Jeremy Kendall
 
Assetic (OSCON)
Kris Wallsmith
 
The jQuery Divide
Rebecca Murphey
 
NoSQL & MongoDB
Shuai Liu
 
Potential Friend Finder
Richard Schneeman
 
The effective use of Django ORM
Yaroslav Muravskyi
 
PHP 1
Mohammed Abutabikh
 
NoSQL を Ruby で実践するための n 個の方法
Tomohiro Nishimura
 

What's hot (15)

ODP
Terms of endearment - the ElasticSearch Query DSL explained
clintongormley
 
KEY
(Ab)Using the MetaCPAN API for Fun and Profit
Olaf Alders
 
PDF
Tips of CakePHP and MongoDB - Cakefest2011 ichikaway
ichikaway
 
PPT
Fantom and Tales
kaushik_sathupadi
 
PDF
RESTFUL SERVICES MADE EASY: THE EVE REST API FRAMEWORK - Nicola Iarocci - Co...
Codemotion
 
PPT
PHP Tutorial (funtion)
Tinnakorn Puttha
 
PDF
Current state-of-php
Richard McIntyre
 
PDF
How to use MongoDB with CakePHP
ichikaway
 
PDF
Fazendo mágica com ElasticSearch
Pedro Franceschi
 
PDF
jQuery%20on%20Rails%20Presentation
guestcf600a
 
PDF
10gen Presents Schema Design and Data Modeling
DATAVERSITY
 
PPTX
Raleigh Web Design Meetup Group - Sass Presentation
Daniel Yuschick
 
PPTX
SPL - The Undiscovered Library - PHPBarcelona 2015
Mark Baker
 
PDF
My First Ruby
Murray Steele
 
PDF
анатолий шарифулин Mojolicious
rit2010
 
Terms of endearment - the ElasticSearch Query DSL explained
clintongormley
 
(Ab)Using the MetaCPAN API for Fun and Profit
Olaf Alders
 
Tips of CakePHP and MongoDB - Cakefest2011 ichikaway
ichikaway
 
Fantom and Tales
kaushik_sathupadi
 
RESTFUL SERVICES MADE EASY: THE EVE REST API FRAMEWORK - Nicola Iarocci - Co...
Codemotion
 
PHP Tutorial (funtion)
Tinnakorn Puttha
 
Current state-of-php
Richard McIntyre
 
How to use MongoDB with CakePHP
ichikaway
 
Fazendo mágica com ElasticSearch
Pedro Franceschi
 
jQuery%20on%20Rails%20Presentation
guestcf600a
 
10gen Presents Schema Design and Data Modeling
DATAVERSITY
 
Raleigh Web Design Meetup Group - Sass Presentation
Daniel Yuschick
 
SPL - The Undiscovered Library - PHPBarcelona 2015
Mark Baker
 
My First Ruby
Murray Steele
 
анатолий шарифулин Mojolicious
rit2010
 
Ad

Viewers also liked (7)

PDF
Illinois Health Care Spring It Technology Conference
jfsheridan
 
ODP
A Brief Introduction to Zend_Form
Jeremy Kendall
 
ODP
Zero to Zend Framework in 10 minutes
Jeremy Kendall
 
ODP
TDD in PHP - Memphis PHP 2011-08-25
Jeremy Kendall
 
ODP
Intro to #memtech PHP 2011-12-05
Jeremy Kendall
 
ODP
Tdd in php a brief example
Jeremy Kendall
 
PDF
Didactica concepto, objeto y finalidades
Alejandro De Greef
 
Illinois Health Care Spring It Technology Conference
jfsheridan
 
A Brief Introduction to Zend_Form
Jeremy Kendall
 
Zero to Zend Framework in 10 minutes
Jeremy Kendall
 
TDD in PHP - Memphis PHP 2011-08-25
Jeremy Kendall
 
Intro to #memtech PHP 2011-12-05
Jeremy Kendall
 
Tdd in php a brief example
Jeremy Kendall
 
Didactica concepto, objeto y finalidades
Alejandro De Greef
 
Ad

Similar to Leveraging the Power of Graph Databases in PHP (20)

PDF
Leveraging the Power of Graph Databases in PHP
Jeremy Kendall
 
PDF
Neo4j (Part 1)
Bibhuti Regmi
 
PDF
Neo4j Introduction (Basics, Cypher, RDBMS to GRAPH)
David Fombella Pombal
 
PDF
Getting started with Graph Databases & Neo4j
Suroor Wijdan
 
PDF
Introduction to graph databases, Neo4j and Spring Data - English 2015 Edition
Aleksander Stensby
 
PPT
Hands on Training – Graph Database with Neo4j
Serendio Inc.
 
PDF
Neo4j: Graph-like power
Roman Rodomansky
 
PDF
3rd Athens Big Data Meetup - 2nd Talk - Neo4j: The World's Leading Graph DB
Athens Big Data
 
PPTX
Intro to Cypher
Brian Underwood
 
PDF
Neo4j Introduction (for Techies)
Patrick Baumgartner
 
PPTX
Neo4j
George Eleftheriadis
 
PDF
Combine Spring Data Neo4j and Spring Boot to quickl
Neo4j
 
PDF
Understanding Graph Databases with Neo4j and Cypher
Ruhaim Izmeth
 
PDF
Polyglot Persistence with MongoDB and Neo4j
Corie Pollock
 
PDF
Graph Database Using Neo4J
Harmeet Singh(Taara)
 
PDF
Neo4J
nklmish
 
PPTX
Neo4j graph database
Prashant Bhargava
 
PPTX
The Inside Scoop on Neo4j: Meet the Builders
Neo4j
 
PDF
Introduction to Graph Databases with Neo4J
Brant Boehmann
 
PDF
There and Back Again, A Developer's Tale
Neo4j
 
Leveraging the Power of Graph Databases in PHP
Jeremy Kendall
 
Neo4j (Part 1)
Bibhuti Regmi
 
Neo4j Introduction (Basics, Cypher, RDBMS to GRAPH)
David Fombella Pombal
 
Getting started with Graph Databases & Neo4j
Suroor Wijdan
 
Introduction to graph databases, Neo4j and Spring Data - English 2015 Edition
Aleksander Stensby
 
Hands on Training – Graph Database with Neo4j
Serendio Inc.
 
Neo4j: Graph-like power
Roman Rodomansky
 
3rd Athens Big Data Meetup - 2nd Talk - Neo4j: The World's Leading Graph DB
Athens Big Data
 
Intro to Cypher
Brian Underwood
 
Neo4j Introduction (for Techies)
Patrick Baumgartner
 
Neo4j
George Eleftheriadis
 
Combine Spring Data Neo4j and Spring Boot to quickl
Neo4j
 
Understanding Graph Databases with Neo4j and Cypher
Ruhaim Izmeth
 
Polyglot Persistence with MongoDB and Neo4j
Corie Pollock
 
Graph Database Using Neo4J
Harmeet Singh(Taara)
 
Neo4J
nklmish
 
Neo4j graph database
Prashant Bhargava
 
The Inside Scoop on Neo4j: Meet the Builders
Neo4j
 
Introduction to Graph Databases with Neo4J
Brant Boehmann
 
There and Back Again, A Developer's Tale
Neo4j
 

More from Jeremy Kendall (9)

PDF
5 Ways to Awesome-ize Your (PHP) Code
Jeremy Kendall
 
PDF
Game Changing Dependency Management
Jeremy Kendall
 
PDF
Keeping it small - Getting to know the Slim PHP micro framework
Jeremy Kendall
 
PDF
Keeping it Small: Getting to know the Slim Micro Framework
Jeremy Kendall
 
KEY
Keeping it small: Getting to know the Slim micro framework
Jeremy Kendall
 
KEY
Php 101: PDO
Jeremy Kendall
 
ODP
PHP 102: Out with the Bad, In with the Good
Jeremy Kendall
 
ODP
Zend_Form to the Rescue - A Brief Introduction to Zend_Form
Jeremy Kendall
 
PDF
Zero to ZF in 10 Minutes
Jeremy Kendall
 
5 Ways to Awesome-ize Your (PHP) Code
Jeremy Kendall
 
Game Changing Dependency Management
Jeremy Kendall
 
Keeping it small - Getting to know the Slim PHP micro framework
Jeremy Kendall
 
Keeping it Small: Getting to know the Slim Micro Framework
Jeremy Kendall
 
Keeping it small: Getting to know the Slim micro framework
Jeremy Kendall
 
Php 101: PDO
Jeremy Kendall
 
PHP 102: Out with the Bad, In with the Good
Jeremy Kendall
 
Zend_Form to the Rescue - A Brief Introduction to Zend_Form
Jeremy Kendall
 
Zero to ZF in 10 Minutes
Jeremy Kendall
 

Recently uploaded (20)

PDF
Shreyas Phanse Resume: Experienced Backend Engineer | Java • Spring Boot • Ka...
SHREYAS PHANSE
 
PDF
Architecting across the Boundaries of two Complex Domains - Healthcare & Tech...
Peter Tan
 
PPT
Teaching material agriculture food technology
LiaRayya
 
PDF
How UI/UX Design Impacts User Retention in Mobile Apps.pdf
SynapseIndia
 
PDF
Encapsulation_ Review paper, used for researhc scholars
gurumoop
 
PDF
Encapsulation theory and applications.pdf
gurumoop
 
PDF
CIFDAQ's Market Insight: SEC Turns Pro Crypto
CIFDAQ
 
PPTX
20250228 LYD VKU AI Blended-Learning.pptx
DatVoNgoc
 
PPTX
Cloud computing and distributed systems.
kkkkkhan
 
PDF
Machine learning based COVID-19 study performance prediction
IAESIJAI
 
PDF
Unlocking AI with Model Context Protocol (MCP)
Brian McKeiver
 
PDF
Empathic Computing: Creating Shared Understanding
Mark Billinghurst
 
PDF
Reach Out and Touch Someone: Haptics and Empathic Computing
Mark Billinghurst
 
PDF
TokAI - TikTok AI Agent : The First AI Application That Analyzes 10,000+ Vira...
SOFTTECHHUB
 
PDF
Diabetes mellitus diagnosis method based random forest with bat algorithm
IAESIJAI
 
PDF
Electronic commerce courselecture one. Pdf
OmerMohamed64
 
PDF
Peak of Data & AI Encore- AI for Metadata and Smarter Workflows
Safe Software
 
PPTX
Understanding_Digital_Forensics_Presentation.pptx
ImranKhan423233
 
PDF
Blue Purple Modern Animated Computer Science Presentation.pdf.pdf
Akar16
 
PPTX
Big Data Technologies - Introduction.pptx
kuthubussaman1
 
Shreyas Phanse Resume: Experienced Backend Engineer | Java • Spring Boot • Ka...
SHREYAS PHANSE
 
Architecting across the Boundaries of two Complex Domains - Healthcare & Tech...
Peter Tan
 
Teaching material agriculture food technology
LiaRayya
 
How UI/UX Design Impacts User Retention in Mobile Apps.pdf
SynapseIndia
 
Encapsulation_ Review paper, used for researhc scholars
gurumoop
 
Encapsulation theory and applications.pdf
gurumoop
 
CIFDAQ's Market Insight: SEC Turns Pro Crypto
CIFDAQ
 
20250228 LYD VKU AI Blended-Learning.pptx
DatVoNgoc
 
Cloud computing and distributed systems.
kkkkkhan
 
Machine learning based COVID-19 study performance prediction
IAESIJAI
 
Unlocking AI with Model Context Protocol (MCP)
Brian McKeiver
 
Empathic Computing: Creating Shared Understanding
Mark Billinghurst
 
Reach Out and Touch Someone: Haptics and Empathic Computing
Mark Billinghurst
 
TokAI - TikTok AI Agent : The First AI Application That Analyzes 10,000+ Vira...
SOFTTECHHUB
 
Diabetes mellitus diagnosis method based random forest with bat algorithm
IAESIJAI
 
Electronic commerce courselecture one. Pdf
OmerMohamed64
 
Peak of Data & AI Encore- AI for Metadata and Smarter Workflows
Safe Software
 
Understanding_Digital_Forensics_Presentation.pptx
ImranKhan423233
 
Blue Purple Modern Animated Computer Science Presentation.pdf.pdf
Akar16
 
Big Data Technologies - Introduction.pptx
kuthubussaman1
 

Leveraging the Power of Graph Databases in PHP

  • 1. Leveraging the Power of Graph Databases in PHP Jeremy Kendall Nashville PHP November 2014
  • 3. Also - New Father
  • 8. Graph Databases • Data Model! • Nodes with properties • Typed relationships
  • 9. Graph Databases • Data Model! • Nodes with properties • Typed relationships • Strengths! • Highly connected data • ACID
  • 10. Graph Databases • Data Model! • Nodes with properties • Typed relationships • Strengths! • Highly connected data • ACID • Weaknesses! • Paradigm shift
  • 11. Graph Databases • Data Model! • Nodes with properties • Typed relationships • Strengths! • Highly connected data • ACID • Weaknesses! • Paradigm shift • Examples! • Neo4j, Titan, OrientDB
  • 13. Why Care? • All the NoSQL Joy • Schema-less • Semi-structured data
  • 14. Why Care? • All the NoSQL Joy • Schema-less • Semi-structured data • Escape from JOIN Hell
  • 15. Why Care? • All the NoSQL Joy • Schema-less • Semi-structured data • Escape from JOIN Hell • Speed
  • 17. Why Care? • Relationships have 1st class status
  • 18. Why Care? • Relationships have 1st class status • Just as important as the objects connecting them
  • 19. Why Care? • Relationships have 1st class status • Just as important as the objects connecting them • You can have properties & labels
  • 20. Why Care? • Relationships have 1st class status • Just as important as the objects connecting them • You can have properties & labels • Multiple relationships
  • 22. Speed Depth MySQL Query Time Neo4j Query Time Records Returned 2 0.028 (28 MS) 0.04 ~900 3 0.213 0.06 ~999 4 10.273 0.07 ~999 5 92.613 0.07 ~999 1,000 people with an average 50 friends each
  • 23. Crazy Speed Depth MySQL Query Time Neo4j Query Time Records Returned 2 0.016 (16 MS) 0.01 ~2500 3 30.27 0.168 ~125,000 4 1543.505 1.359 ~600,000 5 Stopped after 1 hour 2.132 ~800,000 1,000,000 people with an average 50 friends each
  • 25. Cypher • Neo4j’s declarative query language • Easy to pick up • Some clauses and concepts familiar from SQL
  • 27. Goal
  • 28. Create Some Nodes CREATE (jk:Person { name: "Jeremy Kendall" })! CREATE (gs:Company { name: "Graph Story" })! ! CREATE (tn:State { name: "Tennessee" })! CREATE (memphis:City { name: "Memphis" })! CREATE (nashville:City { name: "Nashville" })! ! CREATE (hotchicken:Food { name: "Hot Chicken" })! CREATE (bbq:Food { name: "Barbecue" })! CREATE (photography:Hobby { name: "Photography" })! CREATE (language:Language { name: "PHP" })! ! // . . . snip . . .!
  • 29. Create Some Relationships // . . . snip . . .! ! CREATE (jk)-[:WORKS_AT { title: {"CTO"}]->(gs),! (jk)-[:LIVES_IN]->(memphis)-[:LIVED_IN]->(nashville),! (hotchicken)-[:ONLY_IN]->(nashville),! (bbq)-[:ONLY_IN]->(memphis),! (jk)-[:LOVES]->(hotchicken),! ! // . . . snip . . .!
  • 30. Create Some Relationships // . . . snip . . .! ! CREATE (jk)-[:WORKS_AT { title: {"CTO"}]->(gs),! (jk)-[:LIVES_IN]->(memphis)-[:LIVED_IN]->(nashville),! (hotchicken)-[:ONLY_IN]->(nashville),! (bbq)-[:ONLY_IN]->(memphis),! (jk)-[:LOVES]->(hotchicken),! ! // . . . snip . . .!
  • 31. Create Some Relationships // . . . snip . . .! ! CREATE (jk)-[:WORKS_AT { title: {"CTO"}]->(gs),! (jk)-[:LIVES_IN]->(memphis)-[:LIVED_IN]->(nashville),! (hotchicken)-[:ONLY_IN]->(nashville),! (bbq)-[:ONLY_IN]->(memphis),! (jk)-[:LOVES]->(hotchicken),! ! // . . . snip . . .!
  • 32. Create Some Relationships // . . . snip . . .! ! CREATE (jk)-[:WORKS_AT { title: {"CTO"}]->(gs),! (jk)-[:LIVES_IN]->(memphis)-[:LIVED_IN]->(nashville),! (hotchicken)-[:ONLY_IN]->(nashville),! (bbq)-[:ONLY_IN]->(memphis),! (jk)-[:LOVES]->(hotchicken),! ! // . . . snip . . .!
  • 33. Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
  • 34. Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
  • 35. Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
  • 36. Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
  • 37. Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
  • 38. Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
  • 39. Example Cypher Query MATCH (p:Person { name: "Jeremy Kendall" })-[:LOVES]->(l)! WITH p, l! MATCH (p)-[:WORKS_AT]->(j)! WITH p, l, j! MATCH (p)-[:LIVES_IN]->(c:City)-[:LIVED_IN*0..]->(o:City)! RETURN p, l, j, o
  • 42. Neo4jPHP • PHP wrapper for the Neo4j REST API • Installable via Composer • Used internally at Graph Story • Used in this presentation • Well tested • https://packagist.org/packages/everyman/ neo4jphp
  • 43. Also see: NeoClient • Written by Neoxygen • Alternative PHP wrapper for the Neo4j REST API • Installable via Composer • Under review for internal use at Graph Story • Well tested • https://packagist.org/packages/neoxygen/neoclient
  • 44. Connecting $neo4jClient = new EverymanNeo4jClient(! ‘yourgraph.example.com’, ! 7473! );! ! $neo4jClient->getTransport()! ->setAuth('username', 'password')! ->getTransport()->useHttps();
  • 45. Creating a Node and Label $node = new Node($neo4jClient);! ! $label = $neo4jClient->makeLabel('Person');! ! $node->setProperty('name', ‘Jeremy Kendall');! ! $node->save()->addLabels(array($label));
  • 46. Searching // Searching for a label by property! $label = $neo4jClient->makeLabel('Person');! $nodes = $label->getNodes('name', $name);
  • 47. Querying (Cypher) $queryString = ! 'MATCH (p:Person { name: { name }}) RETURN p';! ! $query = new EverymanNeo4jCypherQuery(! $neo4jClient,! $queryString,! ['name' => ‘Jeremy Kendall']! );! ! $result = $query->getResultSet();
  • 49. Named Parameters $queryString = ! 'MATCH (p:Person { name: { name }}) RETURN p';! ! $query = new EverymanNeo4jCypherQuery(! $neo4jClient,! $queryString,! ['name' => ‘Jeremy Kendall']! );! ! $result = $query->getResultSet();
  • 50. Named Parameters $queryString = ! 'MATCH (p:Person { name: { name }}) RETURN p';! ! $query = new EverymanNeo4jCypherQuery(! $neo4jClient,! $queryString,! ['name' => ‘Jeremy Kendall']! );! ! $result = $query->getResultSet();
  • 52. News Feed • Modeled as a list of posts • Newest post first • All subsequent posts follow • Relationships: LASTPOST and NEXTPOST
  • 55. The Content Model class Content! {! public $node;! public $nodeId;! public $contentId;! public $title;! public $url;! public $tagstr;! public $timestamp;! public $userNameForPost;! public $owner = false;! }
  • 56. Adding Content public static function add($username, Content $content)! {! $queryString =<<<CYPHER! MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url:{url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner! CYPHER;! ! $query = new Query(! Neo4jClient::client(),! $queryString,! array(! 'u' => $username,! 'title' => $content->title,! 'url' => $content->url,! 'tagstr' => $content->tagstr,! 'timestamp' => time(),! 'contentId' => uniqid()! )! );! $result = $query->getResultSet();! ! return self::returnMappedContent($result);! }
  • 57. Adding Content public static function add($username, Content $content)! {! $queryString =<<<CYPHER! MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url:{url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner! CYPHER;! ! $query = new Query(! Neo4jClient::client(),! $queryString,! array(! 'u' => $username,! 'title' => $content->title,! 'url' => $content->url,! 'tagstr' => $content->tagstr,! 'timestamp' => time(),! 'contentId' => uniqid()! )! );! $result = $query->getResultSet();! ! return self::returnMappedContent($result);! }
  • 58. Adding Content public static function add($username, Content $content)! {! $queryString =<<<CYPHER! MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url:{url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner! CYPHER;! ! $query = new Query(! Neo4jClient::client(),! $queryString,! array(! 'u' => $username,! 'title' => $content->title,! 'url' => $content->url,! 'tagstr' => $content->tagstr,! 'timestamp' => time(),! 'contentId' => uniqid()! )! );! $result = $query->getResultSet();! ! return self::returnMappedContent($result);! }
  • 59. Adding Content MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url: {url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner
  • 60. Adding Content MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url: {url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner
  • 61. Adding Content MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url: {url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner
  • 62. Adding Content MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url: {url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner
  • 63. Adding Content MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url: {url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner
  • 64. Adding Content MATCH (user { username: {u}})! OPTIONAL MATCH (user)-[r:LASTPOST]->(lastpost)! DELETE r! CREATE (user)-[:LASTPOST]->(p:Content { title:{title}, url: {url}, tagstr:{tagstr}, timestamp:{timestamp}, contentId: {contentId} })! WITH p, collect(lastpost) as lastposts! FOREACH (x IN lastposts | CREATE p-[:NEXTPOST]->x)! RETURN p, {u} as username, true as owner
  • 65. Adding Content $query = new Query(! $neo4jClient,! $queryString,! array(! 'u' => $username,! 'title' => $content->title,! 'url' => $content->url,! 'tagstr' => $content->tagstr,! 'timestamp' => time(),! 'contentId' => uniqid()! )! );! ! $result = $query->getResultSet();
  • 66. Retrieving Content public static function getContent($username, $skip)! {! $queryString = <<<CYPHER! MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4! CYPHER;! ! $query = new Query(! Neo4jClient::client(),! $queryString,! array(! 'u' => $username,! 'skip' => $skip,! )! );! ! $result = $query->getResultSet();! ! return self::returnMappedContent($result);! }
  • 67. Retrieving Content MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4
  • 68. Retrieving Content MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4
  • 69. Retrieving Content MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4
  • 70. Retrieving Content MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4
  • 71. Retrieving Content MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4
  • 72. Retrieving Content MATCH (u:User { username: { u }})-[:FOLLOWS*0..1]->f! WITH DISTINCT f, u! MATCH f-[:LASTPOST]-lp-[:NEXTPOST*0..]-p! RETURN p, f.username as username, f = u as owner! ORDER BY p.timestamp desc SKIP { skip } LIMIT 4
  • 73. Editing Content public static function edit(Content $content)! {! $updatedAt = time();! ! $node = $content->node;! $node->setProperty('title', $content->title);! $node->setProperty('url', $content->url);! $node->setProperty('tagstr', $content->tagstr);! $node->setProperty('updated', $updatedAt);! $node->save();! ! $content->updated = $updatedAt;! ! return $content;! }
  • 74. Editing Content public static function edit(Content $content)! {! $updatedAt = time();! ! $node = $content->node;! $node->setProperty('title', $content->title);! $node->setProperty('url', $content->url);! $node->setProperty('tagstr', $content->tagstr);! $node->setProperty('updated', $updatedAt);! $node->save();! ! $content->updated = $updatedAt;! ! return $content;! }
  • 75. Editing Content public static function edit(Content $content)! {! $updatedAt = time();! ! $node = $content->node;! $node->setProperty('title', $content->title);! $node->setProperty('url', $content->url);! $node->setProperty('tagstr', $content->tagstr);! $node->setProperty('updated', $updatedAt);! $node->save();! ! $content->updated = $updatedAt;! ! return $content;! }
  • 76. Editing Content public static function edit(Content $content)! {! $updatedAt = time();! ! $node = $content->node;! $node->setProperty('title', $content->title);! $node->setProperty('url', $content->url);! $node->setProperty('tagstr', $content->tagstr);! $node->setProperty('updated', $updatedAt);! $node->save();! ! $content->updated = $updatedAt;! ! return $content;! }
  • 77. Editing Content public static function edit(Content $content)! {! $updatedAt = time();! ! $node = $content->node;! $node->setProperty('title', $content->title);! $node->setProperty('url', $content->url);! $node->setProperty('tagstr', $content->tagstr);! $node->setProperty('updated', $updatedAt);! $node->save();! ! $content->updated = $updatedAt;! ! return $content;! }
  • 78. Deleting Content public static function delete($username, $contentId)! {! $queryString = self::getDeleteQueryString(! $username, ! $contentId! );! ! $params = array(! 'username' => $username,! 'contentId' => $contentId,! );! ! $query = new Query(! $neo4jClient,! $queryString, ! $params! );! $query->getResultSet();! }
  • 79. Deleting Content public static function delete($username, $contentId)! {! $queryString = self::getDeleteQueryString(! $username, ! $contentId! );! ! $params = array(! 'username' => $username,! 'contentId' => $contentId,! );! ! $query = new Query(! $neo4jClient,! $queryString, ! $params! );! $query->getResultSet();! }
  • 80. Deleting Content public static function delete($username, $contentId)! {! $queryString = self::getDeleteQueryString(! $username, ! $contentId! );! ! $params = array(! 'username' => $username,! 'contentId' => $contentId,! );! ! $query = new Query(! $neo4jClient,! $queryString, ! $params! );! $query->getResultSet();! }
  • 81. Deleting Content public static function delete($username, $contentId)! {! $queryString = self::getDeleteQueryString(! $username, ! $contentId! );! ! $params = array(! 'username' => $username,! 'contentId' => $contentId,! );! ! $query = new Query(! $neo4jClient,! $queryString, ! $params! );! $query->getResultSet();! }
  • 82. Deleting Content: Leaf // If leaf! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(c:Content { contentId: { contentId }})! WITH c! MATCH (c)-[r]-()! DELETE c, r
  • 83. Deleting Content: Leaf // If leaf! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(c:Content { contentId: { contentId }})! WITH c! MATCH (c)-[r]-()! DELETE c, r
  • 84. Deleting Content: Leaf // If leaf! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(c:Content { contentId: { contentId }})! WITH c! MATCH (c)-[r]-()! DELETE c, r
  • 85. Deleting Content: Leaf // If leaf! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(c:Content { contentId: { contentId }})! WITH c! MATCH (c)-[r]-()! DELETE c, r
  • 86. Deleting Content: Leaf // If leaf! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(c:Content { contentId: { contentId }})! WITH c! MATCH (c)-[r]-()! DELETE c, r
  • 87. Deleting Content: LASTPOST // If last! MATCH (u:User { username: { username }})-[lp:LASTPOST]- >(del:Content { contentId: { contentId }})-[np:NEXTPOST]- >(nextPost)! CREATE UNIQUE (u)-[:LASTPOST]->(nextPost)! DELETE lp, del, np
  • 88. Deleting Content: LASTPOST // If last! MATCH (u:User { username: { username }})-[lp:LASTPOST]- >(del:Content { contentId: { contentId }})-[np:NEXTPOST]- >(nextPost)! CREATE UNIQUE (u)-[:LASTPOST]->(nextPost)! DELETE lp, del, np
  • 89. Deleting Content: LASTPOST // If last! MATCH (u:User { username: { username }})-[lp:LASTPOST]- >(del:Content { contentId: { contentId }})-[np:NEXTPOST]- >(nextPost)! CREATE UNIQUE (u)-[:LASTPOST]->(nextPost)! DELETE lp, del, np
  • 90. Deleting Content: LASTPOST // If last! MATCH (u:User { username: { username }})-[lp:LASTPOST]- >(del:Content { contentId: { contentId }})-[np:NEXTPOST]- >(nextPost)! CREATE UNIQUE (u)-[:LASTPOST]->(nextPost)! DELETE lp, del, np
  • 91. Deleting Content: Other // All other! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(before),! (before)-[delBefore]->(del:Content { contentId: { contentId }})-[delAfter]->(after)! CREATE UNIQUE (before)-[:NEXTPOST]->(after)! DELETE del, delBefore, delAfter
  • 92. Deleting Content: Other // All other! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(before),! (before)-[delBefore]->(del:Content { contentId: { contentId }})-[delAfter]->(after)! CREATE UNIQUE (before)-[:NEXTPOST]->(after)! DELETE del, delBefore, delAfter
  • 93. Deleting Content: Other // All other! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(before),! (before)-[delBefore]->(del:Content { contentId: { contentId }})-[delAfter]->(after)! CREATE UNIQUE (before)-[:NEXTPOST]->(after)! DELETE del, delBefore, delAfter
  • 94. Deleting Content: Other // All other! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(before),! (before)-[delBefore]->(del:Content { contentId: { contentId }})-[delAfter]->(after)! CREATE UNIQUE (before)-[:NEXTPOST]->(after)! DELETE del, delBefore, delAfter
  • 95. Deleting Content: Other // All other! MATCH (u:User { username: { username }})-[:LASTPOST| NEXTPOST*0..]->(before),! (before)-[delBefore]->(del:Content { contentId: { contentId }})-[delAfter]->(after)! CREATE UNIQUE (before)-[:NEXTPOST]->(after)! DELETE del, delBefore, delAfter