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Head's Up! Site migration is underway. Phase 2: migrate recent content

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About the Drivers & Stacks category

All applications using Neo4j depend on drivers to execute statements to update or query data. Neo4j drivers are mostly built on the binary Bolt protocol. Official drivers exist for Java, JavaScript, .Net, Python, and Go and more. Other languages (R, ...

yolande by Community Team
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Using ID in update mutation?

The generated mutation will use the first field listed in schema as the identifier for the mutation, eg type Person { username: String name: String group: String email: String } will generate UpdatePerson( username: String! name: String grou...

li3zhang by Node Link
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Returning a list of labels and counts with GraphQL

Not sure whether this is possible, I tried and couldn't get it to work. I'd like to run a query to return a list of label names and the associated node counts based on this cypher query: MATCH (n) RETURN labels(n), COUNT(labels(n)) I thought I might ...

Resolved! Database crashes after too many queries?

Hi, I'm using Neo4j 4.0.4 with GraphDataScience 1.2.1 library, from python 3.8.3 using the official neo4j python driver. I have a script to call Louvain algorithm from python, but my database keeps crashing with the following error : Traceback (most ...

Django API not returning any nodes

Hi, I created a Django rest framework API to interact with a local Neo4j database, and it works in that I can add nodes, edit nodes, add relationships and what not. However, when I try to assign a MATCH query to a variable and return that variable, ...

Error with params using python neo4j driver and flask app

Hello, I'm newbie here I'm trying to write a little web app with neo4j 4.0 python 3.8 and flask. I followed the doc here when I execute my python code direc...

olivier by Node Link
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Debugging neobolt.exceptions.ServiceUnavailable error

Hello, I seem to be running into the following error and can't pinpoint the cause: neobolt.exceptions.ServiceUnavailable: Failed to read from defunct connection Address(host='localhost', port=7687) (Address(host='', port=7687)) My general wo...

Rogie by Node Link
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Workflow for threads and writing to Neo4j?

I have code that reads data from the web, cleans it up, and stores it in Neo4j. I'm wondering how to "parallelize" this process, since getting the data from web can be slow sometimes. My current setup is something like this: In : from neo4j...

Rogie by Node Link
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Resolved! Java Neo4j 3.5.1 - Loading Dates converts into String

Dear sirs or madams, while loading plain dates with spring-data-neo4j formatted dates get converted into String while loading, please find below the code used for conversion, I was trying with a converter class and without following the the link: for...

MalteR by Node Link
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Transactions with Spring boot

Hi, We are using Spring data Neo4j with spring boot 2 in our project. We faced issues when we were working with spring transaction management w.r.t Neo4j. A method was annotated with @Transactional(rollbackFor = Exception.class), method logic involve...

chandan by Node
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Neo4J OGM querying issue

Hi, I'm Akila and I'm doing a small personal project to build a property searching system. I'm using spring boot with a neo4j database and I'm trying to query from the neo4j database using filters because I need the querying to be dynamic too. In my ...

Uery returning multiple types

Hello, I use sdn rx library but in an imperative way. I have 3 nodes type : @Node("App") public class App { @Id @GeneratedValue Long id; @Property("name") String name; @DynamicLabels List<String> nodeLabels; } @Node("C...

madiskou by Graph Buddy
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