neo4j-core | simple unified API that can access both the server | Database library

I need to add the following lines to GemFile

Not knowing too much about neo4j, my guess is that neo4j couldn't find the members themselves.

Since you are running 3 replicas im guessing you need to add the expected members fqdn in the initial__discovery__members variable.

Turns out there were multiple fixes, the core being setting deploy.endpoint_node: dnsrr to prevent the creation of a docker virtual IP. In the end my working swarm file looks like below.

Working = multiple node working neo4j causal cluster of cores (only); working 100% with Neo4J OGM v3 client connection url bolt+routing://neo-1:7687. I wasn't brave enough yet to try fail over the initial connection; so SPF on neo-1 (initially).

For references, this was answered on an issue in the neo4j repo. Copy/pasting here:

There are a few things you could do. The first thing that I would say is that you should never (or at least very rarely) inject data directly into a query string. It can be:

• Buggy if you have inappropriate escaping of strings
• Slow because Neo4j can't optimize a query plan when the query string changes each time
• Unsecure if this data is coming from a user because they could produce Cypher injection attacks

Ideally sqlParametre should be an array so that you can do this:

You might want to read the upgrade guide before reading the rest of this answer.

The rels relationship was not added to the Neo4j::Core::Node objects which replaced the old Node objects in the old API. I believe we also had a rels method in ActiveNode.

If you are using ActiveNode, the replacement is to define an association. Something like: