apoc | Making Cypher queries | Graph Database library
kandi X-RAY | apoc Summary
kandi X-RAY | apoc Summary
An Apoc Cypher file is a plain-text file with a .acf extension, which contains Cypher / ACF queries.
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Lines of Code : 27License : Strong Copyleft (CC BY-SA 4.0)
Copy// same as above
LOAD CSV WITH HEADERS
FROM 'file:///hd.csv' as line
MERGE (per1:person1 {person1: line.p1})
MERGE (per2:person1 {person1: line.p2})
CREATE (per1)-[:knows]->(per2)
// determine which uuid value to use
// if per1 or per2:param data => [{id:11, children:[111, 112, 113]}, {id:12, children:[121, 122, 123]}, {id:13, children:[131,132,133,134]}, {id:14, children:[]}, {id:111, children:[1111]}, {id:112, children:[1121, 1122, 1123]}, {id:122, children:[1221,1Community Discussions
Trending Discussions on apoc
QUESTION
I upload the json file with this code:
...ANSWER
Answered 2022-Mar-31 at 13:21Your problem could be related to Neo4j encoding your URL again. Thoroughly check the error message of Neo4j and check if for example %3D is replaced by %253D. If that's the case, you have to pass unescaped Uri to the apoc call by using for example Uri.UnescapeDataString().
QUESTION
I would like to create/update properties of an existing Neo4j relationship object dynamically from JSON key values (i.e. without listing all SET statements), but this creates a new relationship with a new id on each update pass. What I would like is to keep only one relationship.
JSON object "properties.json"
...ANSWER
Answered 2022-Mar-18 at 13:34This is how you update the properties prop1 and prop2 properly. There is no shortcut.
QUESTION
I have a graph with two types of nodes: Persons and Houses. In this graph, persons can sell houses (SELLS relationship), and houses are bought by persons (IS_BOUGHT_BY relationship). This could be represented as the following diagram:
ANSWER
Answered 2022-Mar-14 at 14:37Currently, Gremlin, outside of perhaps using in-line code (closure/lambda), has no way to inject virtual edges into a query result. This might be a good feature request to open as a Jira ticket for Apache Tinkerpop at this location.
As a short term solution, I think the best you can do is to create the edges for the needs of a visualization and perhaps give them a unique property key and value something like "virtual":true and to delete such edges when no longer needed.
QUESTION
I'm trying to write Cypher queries for Neo4J with params in a Spring Boot project. There are many tutorials showing showing these things, but none of them work for me. One version goes like this:
...ANSWER
Answered 2022-Mar-12 at 21:29Ok, I have figured it out. The right syntax is.... drum roll...
QUESTION
I have deployed a ReactJS (with neo4j database) application on CentOS 7 server. I want to deploy another instance of the same application on the same server using docker. I have installed docker (version 20.10.12) on the server (CentOS 7).
On the server, I have cloned my reactjs project and created following Dockerfile:
...ANSWER
Answered 2022-Mar-03 at 10:06as said in my comment above: You are not using the first container in the Multi-Stage container.
See this article: https://docs.docker.com/develop/develop-images/multistage-build/#name-your-build-stages
And particularly the example code:
QUESTION
I'm currently learning cypher but trying to figure out how to accomplish the following.
My dataI have a set of nodes in Neo4j that have properties. These properties are seldom used and so having actual nodes does not make much sense. My example below is a list of country nodes with a property of name and continent. We don't often use continent, but it's still there for informational purposes.
...ANSWER
Answered 2022-Mar-01 at 07:39With your query, you generate one continent per row and thus 4 of them, that's why you see disconnected continents.
You need to group countries of the same continent together and create on continent only for them
QUESTION
I'm using the neo4j Python driver to run batched data loads on a local Neo4j database. I have the following packages:
ANSWER
Answered 2022-Feb-18 at 13:01Well, the problem disappears when switching from auto-commit transaction to transaction functions. So instead of the approach above, I did:
QUESTION
I created 2 test files following neo4j's documentation for an apoc csv import (configuration file has: apoc.import.file.enabled=true, apoc.export.file.enabled=true, dbms.directories.plugins=plugins , dbms.directories.import=import), the apoc plug in is in the plug in folder, and the physical csv files are in the neo4j import directory for this instance). I am using these test datasets because I'll be using it for a significantly larger dataset(neo4j admin which is essentially similar syntax).
The edgelist csv file is in this format, with no empty cells:
...ANSWER
Answered 2022-Feb-16 at 23:40This is how I did it. I'm using Neo4j 4.2.4 version.
Create the test_nodelist.csv as below.
QUESTION
I have a json in the following format:
...ANSWER
Answered 2022-Feb-16 at 10:24I was able to solve this using
QUESTION
I am trying to create a subgraph of my graph using Cypher projection because I want to use the GDS library. First, I am creating a subgraph using Cypher query which works perfectly fine. Here is the query:
...ANSWER
Answered 2022-Feb-09 at 19:23To access start and end node of a relationship, there is a slightly different syntax that you are using:
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