Neo4j realizes social recommendation (V)

Catalog

• Understanding graph database neo4j（ One ）
• Understanding graph database neo4j（ Two ）
• Understanding graph database neo4j（ 3、 ... and ）
• neo4j Make social recommendations （ Four ）

Preface

In the fourth part, the basic social character tags and friend relationship information are established , In this article, we will first add the friends of each character , Enrich our knowledge map and better see the display effect of data 、 Then view common concerns through query statements 、 People you may know 、 Several of my friends have also paid attention to his functions

Realization

Create nodes

Wang Wei's friend ： Zhang Jiuling 、 Liguanian 、 meng haoran 、 CEN Shen 、 Yuan Chang 、 Zen master Shenhui 、 Chao Heng
Li Bai already has a friend of Wang Wei among his friends ： meng haoran
Create remaining friends ： Zhang Jiuling 、 Liguanian 、 CEN Shen 、 Yuan Chang 、 Zen master Shenhui 、 Chao Heng

create (n:SocialUser {
    name:' Zhang Jiuling '}) return n;
create (n:SocialUser {
    name:' Liguanian '}) return n;
create (n:SocialUser {
    name:' CEN Shen '}) return n;
create (n:SocialUser {
    name:' Yuan Chang '}) return n;
create (n:SocialUser {
    name:' Zen master Shenhui '}) return n;
create (n:SocialUser {
    name:' Chao Heng '}) return n;

The above are all Li Bai's friends , So we don't need to filter the pointing relationship , Point directly to the label

match (a:SocialUser {
    name:' Wang wei '}),(b:SocialUser) 
    where b.name in [' Zhang Jiuling ',' Liguanian ',' meng haoran ',' CEN Shen ',' Yuan Chang ',' Zen master Shenhui ',' Chao Heng ']
    merge (a)-[:FRIEND]->(b) 
    return a,b

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