Spacial match throwing error - Neo4j::Session::CypherError: org.apache.lucene.queryParser.ParseException: Cannot parse 'withinDistance

[payalgupta]

Hello,

I have used neo4j gem and neo4jrb_spatial ruby library in my application. The modal looks as:

class Eatery include Neo4j::ActiveNode include Neo4j::ActiveNode::Spatial

spatial_index 'eateries' property :lat property :lon ...

A dummy eatery in the database looks like this: eatery = Eatery uuid: "1dc225f1-0c74-499c-a9c4-0499becc50c0", budget_for_2: nil, lat: 60.1, lon: 15.2, name: "Chris's Restauarant", sid: 2, smugglr_score: 0, zomato_score: 3.0

added eatery node to spacial index

eatery.add_to_spatial_index

searching for spacial matches

Neo4j::Session.current.query.start('n = node:eateries({location})').params(location: 'withinDistance:[15.2,60.1,100.0]').pluck(:n) # lon/lat are same as above

Above throws an error : Neo4j::Session::CypherError: org.apache.lucene.queryParser.ParseException: Cannot parse 'withinDistance:[15.2,60.1,100.0]': Encountered " "]" "] "" at line 1, column 31. Was expecting one of: "TO" ...

... ... Any help will be appreciated. Thanks, Payal

[maxdemarzi]

Looks like it has a Lucene Index not a Spatial Index... can you verify the spatial index was created and you don't have a lucene index by the same name? See http://maxdemarzi.com/2014/01/31/neo4j-spatial-part-1/ for looking at spatial internal nodes.

[payalgupta]

@maxdemarzi Thanks for your reply. Yes, i dont see any spatial index getting created. If I try to manually create a spacial index Neo4j::Session.current.create_spatial_index('restaurants')

it fails and says: No index provider 'spatial' found. It seems to be installation issue. Do I need to install something additional for spatial?

[maxdemarzi]

Yes, you need the spatial plugin installed. See https://github.com/neo4j-contrib/spatial#using-the-neo4j-spatial-server-plugin for instructions.

[payalgupta]

@maxdemarzi Thanks.
Feeling embarrassed :( for my stupidity. First hack it then read it :dancer:

[maxdemarzi]

No worries, not your fault. That Readme file is like 1000 pages long, nobody reads it, plus install should be the first thing. Once you get it working, maybe you can contribute a quick "TLDR" section to the readme at the top.

[payalgupta]

@maxdemarzi Yes, will get it working and then add a section for reference.

[payalgupta]

@maxdemarzi Wow! Finally got some results upon searching using spatial query :) Have updated the README and submitted pull request for the same.

Thanks for your prompt help.