Neo4j.rb is an Active Model compliant Ruby/JRuby wrapper for the Neo4j graph database. It uses the neo4j-core and active_attr gems.
Neo4j.rb is an Active Model compliant Ruby/JRuby wrapper for the Neo4j graph database.
Questions tagged [neo4j.rb]
175 questions
6
votes
2 answers
How do I remove ActiveRecord from an existing Rails 4 Application?
I started off a Ruby on Rails Project which includes a simple recommender system with ActiveRecord and Neography. Now I found out about neo4j.rb, which is going to simplify my life by a lot. :-)
I learned by now, that I could create a new…
Joe Eifert
- 1,306
- 14
- 29
5
votes
2 answers
Neo4j - pagination from Ruby on Rails
What is the best pagination option from Ruby on Rails when using Neo4j?
I am looking to paginate with Kaminari, will_paginate gem or even Bootstrap.
Any recommendation?
LDB
- 692
- 6
- 18
5
votes
2 answers
Neo4j.rb create unique relationship
Here is my Neo4j Active Node
class User
include Neo4j::ActiveNode
has_many :out, :following, type: :following, model_class: 'User'
end
john = User.find(:name => "John")
tom = User.find(:name => "Tom")
# create following relationship john -->…
Raj Adroit
- 3,828
- 5
- 31
- 44
4
votes
1 answer
Neo4j: How to filter out nodes from a list of IDs?
I am trying to "select all posts" and exclude specific nodes that are in an array of IDs (post authors). With SQL you can use NOT IN (1, 2, 3). How can I create a CYPHER query to do this?
Post <-- author -- User
- ID - ID
Andrew
- 227,796
- 193
- 515
- 708
4
votes
2 answers
Should I use JRuby or Ruby for Rails with Neo4j.rb?
I'm using Neo4j.rb for Integrating Neo4j Graph database with Rails.
Should I use JRuby or Ruby?
What's the difference (any pros/cons) when using neo4j.rb with JRuby and Ruby?
Some of the examples are telling to use JRuby and I'm able to execute the…
Raj Adroit
- 3,828
- 5
- 31
- 44
4
votes
1 answer
Neo4j gem - Querying relationships that do not exist
I don't really have the code for this yet but I have the opposite of what I need
current_user.friends(:f).match_to(event)
This is going to return the friends that have a relationship to my event node. What I need is the ones that don't have this…
Clam
- 935
- 1
- 12
- 24
4
votes
4 answers
rake db:seed is not working using neo4j gem
I have stated working on neo4j with rails using the gem 'neo4j', I want to seed some data in neo4j database. But whenever I am trying to do rake db:seed, it says
rake aborted!
Don't know how to build task 'db:seed'
I have checked all the rake…
Sabyasachi Ghosh
- 2,765
- 22
- 33
4
votes
1 answer
Creating Relationships in Neo4J model with after_save
So I apologize for how noobish these questions may seem. I'm new to rails and as a first task I also brought in Neo4J as it seemed like the best fit if I grow the project.
I'll explain the flow of actions then show some example code. I'm trying to…
Clam
- 935
- 1
- 12
- 24
3
votes
0 answers
Retrieving subgraph using neo4j.rb
Currently have a graph schema defined with a single node type and a single relationship type. My goal is to pass a particular subgraph to a graph visualization utility for display, so I need to get all nodes and all relationships between the nodes.…
bstovall
- 101
- 1
- 8
3
votes
1 answer
Neo4j.rb giving two types of object on same query (randomly)
Neo4j version - 3.1.1
Neo4j.rb - 8.0.13
Rails - 4.2.2
I am using these versions on local, somtimes same query is giving different results, I am noticing this issue from couple of days since I have tried to upgrade my application (Rails) but that's…
Vishal G
- 1,521
- 11
- 30
3
votes
2 answers
Rails 6 and neo4j.rb?
Is there development happening for Rails 6 in Neo4j.rb? In a new rails 6(rc1) project, if I create a couple scaffolds then run 'rake neo4j:migrate:all' I get an error that when I follow it quickly rabbitholes much deeper into the internals of…
metkat
- 464
- 4
- 10
3
votes
1 answer
Neo4j, Capistrano deployment, Authentication error
I want to deploy a Rails application, using Neo4jrb, to production with Capistrano. During deployment the following error shows up:
DEBUG [5a528d81] Finished in 0.057 seconds with exit status 0 (successful).
INFO [acd66fd5] Running…
LimonChillo
- 53
- 4
3
votes
1 answer
neo4j.rb find path between nodes
I would like to find all paths between two nodes in my graph using neo4j.rb
I know how to write a cypher query for the same and the following source https://github.com/neo4jrb/neo4j/wiki/Neo4j%3A%3ACore-Traverse indicates an "outgoing" function.
But…
Artemis Fowl
- 301
- 1
- 10
3
votes
2 answers
Neo4j.rb - index paginated with Kaminari too slow
Here is my controller (index is sorted):
def index
if params[:limit]
@bisacs = Bisac.order(:bisac_code).page(params[:page]).per(params[:limit])
else
@bisacs = Bisac.order(:bisac_code).page(params[:page])
end
end
Here are…
LDB
- 692
- 6
- 18
3
votes
1 answer
Neo4j - Why uuid is null for all nodes but the database keeps indexing them and attempts to use them during searches?
Here is a brief description of the problem:
irb(main):001:0> b = Bisac.first
CYPHER 268ms MATCH (n:`Bisac`) RETURN n ORDER BY n.uuid LIMIT {limit_1} | {:limit_1=>1}
=> #
LDB
- 692
- 6
- 18