Neo4j

damienthewave · 12-04-2021

Hi, I'm working on a query to find probable siblings of a person in a family tree. MATCH (p: Person) WHERE id(p) = 892 OPTIONAL MATCH (p)-[:IS_CHILD_OF]->()<-[:IS_CHILD_OF]-(prop) OPTIONAL MATCH (p)-[:IS_SIBLING_OF]-(actualSibling)-[:IS_SIBLING_OF*...

damienthewave · 11-26-2021

Hi, in SDN6 Repository, I was trying to write parametrized queries like the one below: @Query("MATCH (person: Person)-[:IS_CHILD_OF*\$degree]->(relative: Person) " + "WHERE id(person) = \$personId " + "RETURN relative") fun getRelativesByDegre...

damienthewave · 11-18-2021

Hi, I have a small inheritance problem in Spring Data Neo4j 6.1.4. Notification is an abstract class and RequestNotification is one of the supertypes. interface NotificationRepository : Neo4jRepository<Notification, Long> { fun findByNotificationI...

damienthewave · 11-12-2021

Hi, yesterday I ran into a problem while creating an account in the application I'm currently developing. The console log says: org.springframework.data.mapping.MappingException: The node with id 5 has a logical cyclic mapping dependency. Its creatio...

damienthewave · 11-06-2021

Hi, I am stuck on a problem where inside spring security's AuthenticationManager's method authenticate() there's an exception being thrown. .n.c.Neo4jPersistenceExceptionTranslator : Don't know how to translate exception of type class org.neo4j.driv...

damienthewave · 12-04-2021

I think I found the solution. Did not know that i could collect(distinct prop)... MATCH (p: Person) WHERE id(p) = 892 OPTIONAL MATCH (p)-[:IS_CHILD_OF]->()<-[:IS_CHILD_OF]-(prop) OPTIONAL MATCH (p)-[:IS_SIBLING_OF]-(actualSibling)-[:IS_SIBLING_OF*1...

damienthewave · 12-02-2021

Thanks for your answer, @gerrit.meier but I must say that it does work with a constant parameter (for instance 3). I do not need to collect relations, as I needed only the properties.

damienthewave · 12-02-2021

I developed the solution - not the clearest but... @Autowired private lateinit var template: Neo4jTemplate ... fun find(personId: Long, type:String, degree: Int) { val query = """ MATCH (person: Person)-[:$type*$degree]->(relative: Person...

damienthewave · 11-19-2021

Thanks for answering, I had seen the mentioned subsection before, but I needed to have a fresh look at it. I solved the issue by adding the "@Node" annotation to the supertype. These classes worked in SDN5 class Notification(...) @Node class Request...

damienthewave · 11-03-2021

Oops! It's querying two times the PARTNER_OF relation. It would be best if the query was: ... OPTIONAL MATCH (n)-[__sr__:`PARTNER_OF`]-(__srn__:`Person`) ... and not: ... OPTIONAL MATCH (n)-[__sr__:`PARTNER_OF`]->(__srn__:`Person`) ... ... OPTIONAL...

Neo4j

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Return distinct values from a merged collection

Custom parametrized queries in SDN6

Inheritance in SDN6

Logical cyclic mapping dependency

AuthenticationManager

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Re: Custom parametrized queries in SDN6

Re: Inheritance in SDN6

Re: Efficient way of storing relations - SDN6