neo4j

问题 I figured out how to write this query when I am looking for 2 relationships, but not sure how to add more relationships to the query. Assume you have a book club database with 'reader' and 'book' as nodes. The 'book' nodes have a 'genre' attribute (to define that the book is a Fiction, Non-Fiction, Biography, Reference, etc.) There is a Relationship "HasRead" between 'reader' nodes and 'book' nodes where someone has read a particular book. If I want to find readers that have read both Fiction

问题 I've seen some simple examples text searching STARTS WITH name such as: http://www.jexp.de/blog/html/full-text-and-spatial-search-in-neo4j-3.html https://blog.knoldus.com/2016/12/11/neo4j-with-scala-neo4j-vs-elasticsearch/ But I'm looking for something more along the lines of full-text search across multiple fields: title , content : https://www.digitalocean.com/community/tutorials/how-to-use-full-text-search-in-postgresql-on-ubuntu-16-04 Can I see an example of how this should be done with

问题 I'm following this little write up: https://github.com/Readify/Neo4jClient/wiki/cypher but I'm doing it from Powershell. so what I have so far is [System.Reflection.Assembly]::LoadFrom("C:\...\Newtonsoft.Json.6.0.3\lib\net40\NewtonSoft.Json.dll") [System.Reflection.Assembly]::LoadFrom("C:\...\Neo4jClient.1.0.0.662\lib\net40\Neo4jClient.dll") $neo = new-object Neo4jClient.GraphClient(new-object Uri("http://localhost:7474/db/data")) $q=$neo.Cypher.Match("n").Return({param($m) $m}); with which I

问题 I'm following this little write up: https://github.com/Readify/Neo4jClient/wiki/cypher but I'm doing it from Powershell. so what I have so far is [System.Reflection.Assembly]::LoadFrom("C:\...\Newtonsoft.Json.6.0.3\lib\net40\NewtonSoft.Json.dll") [System.Reflection.Assembly]::LoadFrom("C:\...\Neo4jClient.1.0.0.662\lib\net40\Neo4jClient.dll") $neo = new-object Neo4jClient.GraphClient(new-object Uri("http://localhost:7474/db/data")) $q=$neo.Cypher.Match("n").Return({param($m) $m}); with which I

问题 Today I tried Spring Data Neo4j, I finally got it working somehow ... I'm using: Spring 4.0.2 Spring Data Neo4j 3.0.0 QueryDSL 3.3.1 Neo4j 2.0.1 Here's my config: @Configuration @EnableNeo4jRepositories(includeFilters=@Filter(value=GraphRepository.class, type=FilterType.ASSIGNABLE_TYPE)) public class Neo4jConfig extends Neo4jConfiguration { public Neo4jConfig() { setBasePackage("my.base.package"); } @Bean public GraphDatabaseService graphDatabaseService() { return new GraphDatabaseFactory()

问题 I am trying to use Jackson 2.x annotations on a Spring Data Neo4j 4.0.0RC1 entity but am seeing failures in my application context starting. I have two @NodeEntities that implement an interface and I've annotated the interface as such: @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type") @JsonSubTypes({ @Type(value = SimpleNode.class, name="simple"), @Type(value = OtherNode.class, name="other") }) public interface Node { } I believe this is correct

问题 I'm using Neo4j graph DB and viewing the data on the browser. So whenever I run a code, i need to change database location field in neo4j-server.properties file. When i try to access DB with browser on I'm getting the following error: Exception in thread "main" java.lang.IllegalStateException: Unable to lock store [<DB path>], this is usually a result of some other Neo4j kernel running using the same store. Is it possible to view the database without locking the store? 回答1: There is another

问题 I'm trying to spin up a Neo4j 3.1 instance in a Docker container (through Docker-Compose), running on OSX (El Capitan). All is well, unless I try to increase the max-heap space available to Neo above the default of 512MB. According to the docs, this can be achieved by adding the environment variable NEO4J_dbms_memory_heap_maxSize , which then causes the server wrapper script to update the neo4j.conf file accordingly. I've checked and it is being updated as one would expect. The problem is,

问题 I'm trying to spin up a Neo4j 3.1 instance in a Docker container (through Docker-Compose), running on OSX (El Capitan). All is well, unless I try to increase the max-heap space available to Neo above the default of 512MB. According to the docs, this can be achieved by adding the environment variable NEO4J_dbms_memory_heap_maxSize , which then causes the server wrapper script to update the neo4j.conf file accordingly. I've checked and it is being updated as one would expect. The problem is,

问题 In Neo4j (version 3.0), the following queries return the same results: 1. MATCH (a:Label) WHERE a.property = "Something" RETURN a 2. MATCH (a:Label {property: "Something"}) RETURN a While playing with some large datasets, I noticed (and verified using EXPLAIN and PROFILE ) that for some instances, queries like the second one performs better and faster. While other instances exist where both versions performed equally, I didn't yet see one where the first version performed better. The neo4j